Abrégé

A constant current charging device is configured to charge a device to be charged and includes: a reference current source configured to provide a reference current; a current mirror electrically coupled to the reference current source and configured to output a mirror current; a current adjustment control unit electrically coupled to the current mirror and the device to be charged wherein the current adjustment control unit is configured to output a charging current according to the mirror current to charge the device to be charged; and a current compensation unit electrically coupled to the current mirror and the current adjustment control unit. The current adjustment control unit includes a voltage follower unit, and the current adjustment control unit tracks a charging voltage through the voltage follower unit to stabilize the charging current.

Classes IPC  ?

• H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries

Abrégé

A constant current charging device is configured to charge a device to be charged and includes: a reference current source; a current mirror electrically coupled to the reference current source and configured to output a mirror current; a current adjustment control unit electrically coupled to the current mirror and the device to be charged; and a current compensation unit electrically coupled to the current mirror and the current adjustment control unit. The current adjustment control unit includes a control transistor and a control contact connected to an output terminal of the current compensation unit and the control transistor, wherein the current adjustment control unit controls the control transistor according to a charging voltage to reduce current flows through the control contact.

Classes IPC  ?

• H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
• G05F 3/16 - Régulation de la tension ou du courant là où la tension ou le courant sont continus utilisant des dispositifs non commandés à caractéristiques non linéaires consistant en des dispositifs à semi-conducteurs

Abrégé

A writing identification system includes a touch control panel, an identification device, and a pairing device. The identification device includes a housing assembly detachably attached to a writing instrument. A trigger sensor is disposed in a first cover of the housing assembly for sensing displacement of the writing instrument. A wireless transmission module is disposed in the first cover. When the trigger sensor senses the displacement and a writing head of the writing instrument contacts a writing board, the wireless transmission module transmits a first identification signal. A power module is disposed in the housing assembly. The pairing device is configured to receive the first identification signal and a handwriting touch signal to generate a first pairing signal and transmit the first pairing signal to a user device.

Classes IPC  ?

• G06F 3/04883 - Techniques d’interaction fondées sur les interfaces utilisateur graphiques [GUI] utilisant des caractéristiques spécifiques fournies par le périphérique d’entrée, p. ex. des fonctions commandées par la rotation d’une souris à deux capteurs, ou par la nature du périphérique d’entrée, p. ex. des gestes en fonction de la pression exercée enregistrée par une tablette numérique utilisant un écran tactile ou une tablette numérique, p. ex. entrée de commandes par des tracés gestuels pour l’entrée de données par calligraphie, p. ex. sous forme de gestes ou de texte
• G06F 3/0354 - Dispositifs de pointage déplacés ou positionnés par l'utilisateurLeurs accessoires avec détection des mouvements relatifs en deux dimensions [2D] entre le dispositif de pointage ou une partie agissante dudit dispositif, et un plan ou une surface, p. ex. souris 2D, boules traçantes, crayons ou palets
• G06F 3/041 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction
• G06F 3/044 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens capacitifs

Abrégé

A haptic feedback method for an electronic system includes pairing an electronic device with a first wireless communication module and an input device with a second wireless communication module and a haptic feedback motor unit, inputting a control signal to the electronic device through the input device, and sending a wireless motor driving signal to the second wireless communication module of the input device by the first wireless communication module of the electronic device according to the control signal, so that the second wireless communication module generates a wired motor driving signal according to the wireless motor driving signal and directly transmits the wired motor driving signal to the haptic feedback motor unit to directly enable vibration of the haptic feedback motor unit.

Classes IPC  ?

• G06F 3/01 - Dispositions d'entrée ou dispositions d'entrée et de sortie combinées pour l'interaction entre l'utilisateur et le calculateur
• H04W 76/14 - Établissement de la connexion en mode direct

Abrégé

An electronic wake-up device and a wake-up method thereof are provided. The electronic wake-up device includes: a power switch device, an electronic device, a gravity sensor, and a wake-up circuit. The wake-up circuit is coupled to the gravity sensor and the electronic device. The wake-up circuit is configured to generate an execution signal according to a sensing activation signal, and generate an electronic device control signal according to the execution signal and a gravity signal to wake up the electronic device.

Classes IPC  ?

• G06F 1/26 - Alimentation en énergie électrique, p. ex. régulation à cet effet
• G06F 1/32 - Moyens destinés à économiser de l'énergie
• G06F 1/3231 - Surveillance de la présence, de l’absence ou du mouvement des utilisateurs
• G06F 1/3296 - Économie d’énergie caractérisée par l'action entreprise par diminution de la tension d’alimentation ou de la tension de fonctionnement

Abrégé

A stylus and a touch interactive device is provided. The stylus includes a pen holder, a cover plate, and a circuit control assembly. The pen holder includes a pen head, a pen wall, and an accommodating space. A groove is defined in the pen wall and communicates with the accommodating space. The pen head is arranged at one end of the pen holder. The cover plate is arranged corresponding to the groove and covers the groove. The circuit control assembly is received in the accommodating space. The circuit control assembly includes a mainboard and a touch sensing module connected to the mainboard. The touch sensing module is attached to the pen wall or a first inner wall of the cover plate to form a touch sensing area. The touch sensing module is used to receive and sense at least one touch command of fingers in the touch sensing area.

Classes IPC  ?

• G06F 3/0354 - Dispositifs de pointage déplacés ou positionnés par l'utilisateurLeurs accessoires avec détection des mouvements relatifs en deux dimensions [2D] entre le dispositif de pointage ou une partie agissante dudit dispositif, et un plan ou une surface, p. ex. souris 2D, boules traçantes, crayons ou palets

Abrégé

An interactive control system includes: an active pen; and an electronic device configured to wirelessly control the active pen, receive a user command, and generate a control command according to the user command, wherein at least one of the active pen and the electronic device is configured to execute a control function according to the control command.

Classes IPC  ?

• G06F 3/0354 - Dispositifs de pointage déplacés ou positionnés par l'utilisateurLeurs accessoires avec détection des mouvements relatifs en deux dimensions [2D] entre le dispositif de pointage ou une partie agissante dudit dispositif, et un plan ou une surface, p. ex. souris 2D, boules traçantes, crayons ou palets
• G06F 3/038 - Dispositions de commande et d'interface à cet effet, p. ex. circuits d'attaque ou circuits de contrôle incorporés dans le dispositif
• G06F 3/041 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction
• H04M 1/72412 - Interfaces utilisateur spécialement adaptées aux téléphones sans fil ou mobiles avec des moyens de soutien local des applications accroissant la fonctionnalité par interfaçage avec des accessoires externes utilisant des interfaces sans fil bidirectionnelles à courte portée

Produits et services

(Based on Intent to Use) Semiconductors; Computer hardware; Computer memories; Computer operating programs, recorded; Downloadable computer operating programs; Downloadable computer operating software; Downloadable computer software and firmware for operating system programs; Electronic chips for the manufacture of integrated circuits; Integrated circuits; Interfaces for computers; Printed circuit boards(Based on 44(d) Priority Application) Semiconductors; Computer hardware; Computer memories; Computer operating programs, recorded; Downloadable computer operating programs; Downloadable computer operating software; Downloadable computer software and firmware for operating system programs; Electronic chips for the manufacture of integrated circuits; Integrated circuits; Interfaces for computers; Printed circuit boards (Based on Intent to Use) Computer programming; Computer software design; Computer system design; Consultancy in the design and development of computer hardware; Design of integrated circuits; Product research and development; Software engineering services for data processing; Writing of computer code(Based on 44(d) Priority Application) Computer programming; Computer software design; Computer system design; Consultancy in the design and development of computer hardware; Design of integrated circuits; Product research and development; Software engineering services for data processing; Writing of computer code

Abrégé

A touch control system includes: a touch panel; an active pen having a plurality of functions, the functions being used for controlling the active pen or the touch panel and initiated only by at least one voice signal, the active pen including: a voice receiving module configured to receive the at least one voice signal; a voice analyzing module configured to analyze the at least one voice signal to generate a controlling command; and a control module configured to determine that the controlling command is configured to control the active pen or the touch panel; and a touch controller electrically connected to the touch panel and receive, in response to the controlling command being configured to control the touch panel, the controlling command.

Classes IPC  ?

• G06F 3/038 - Dispositions de commande et d'interface à cet effet, p. ex. circuits d'attaque ou circuits de contrôle incorporés dans le dispositif
• G06F 3/0354 - Dispositifs de pointage déplacés ou positionnés par l'utilisateurLeurs accessoires avec détection des mouvements relatifs en deux dimensions [2D] entre le dispositif de pointage ou une partie agissante dudit dispositif, et un plan ou une surface, p. ex. souris 2D, boules traçantes, crayons ou palets
• G06F 3/041 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction
• G06F 3/16 - Entrée acoustiqueSortie acoustique
• G06F 3/044 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens capacitifs

Abrégé

The present invention discloses a noise reduction touch light adjustment device including a light adjustment film, a capacitive touch panel, a noise reduction film, a glass substrate, a control circuit module, and an alternating current (AC) transformer. The noise reduction film is disposed between the light adjustment film and the capacitive touch panel to lower noise inputted from the AC transformer into the light adjustment film such that the capacitive touch panel is ensured to be operated precisely.

Classes IPC  ?

• G06F 3/044 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens capacitifs
• G06F 3/041 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction

Abrégé

A digital audio array circuit is provided. The digital audio array circuit includes at least two digital audio units and a system master unit. Each of the digital audio units is configured to transform a received sound wave to a digital audio signal. Each of the digital audio units includes a left/right channel configuration input terminal. The system master unit is connected to the at least two digital audio units in time division multiplexing to receive the digital audio signals. The left/right channel configuration input terminal of each of the digital audio units is configured to receive a same synchronizing signal.

Classes IPC  ?

• H04S 7/00 - Dispositions pour l'indicationDispositions pour la commande, p. ex. pour la commande de l'équilibrage
• H04S 1/00 - Systèmes à deux canaux
• H04R 5/04 - Circuits

Abrégé

A constant current charging device is configured to charge a device to be charged and includes: a current regulating unit electrically coupled to the device to be charged and configured to provide a regulating current and a charging current according to a reference voltage; a current-to-voltage converting unit electrically coupled to the current regulating unit and configured to output a regulating voltage according to the regulating current; and a first operational amplifier electrically coupled to the current regulating unit, the current-to-voltage converting unit, and the device to be charged and configured to regulate the regulating current.

Classes IPC  ?

• H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries

Abrégé

A constant current charging device is configured to charge a device to be charged and includes: a reference current source configured to provide a reference current; a current mirror electrically coupled to the reference current source and configured to output a mirror current; a current adjusting unit electrically coupled to the current mirror and the device to be charged and configured to output a charging current according to the mirror current to charge the device to be charged; and a current compensation unit electrically coupled to the current mirror and the current adjusting unit and configured to adjust the charging current according to a reference voltage.

Classes IPC  ?

• G05F 3/26 - Miroirs de courant
• H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries

Abrégé

The present disclosure provides an audio data processing circuit and an audio data processing method. The audio data processing circuit includes a word select interface, a clock signal interface and an audio data interface. The word select interface is configured to receive a word select signal. The clock signal interface is configured to receive a clock signal, and generating an audio data interface signal according to a number of clocks of the clock signal in one period of the word select signal. The audio data interface is configured to transmit the audio data to a processing unit through a first transmission protocol or a second transmission protocol.

Classes IPC  ?

• G06F 3/16 - Entrée acoustiqueSortie acoustique
• G06F 1/04 - Génération ou distribution de signaux d'horloge ou de signaux dérivés directement de ceux-ci

Abrégé

A touch electrode structure and a capacitive touch system are provided. The touch electrode structure includes: a substrate; a plurality of first electrode series each including a plurality of first electrodes; a plurality of second electrode series each including a plurality of second electrodes; and at least one connecting wire. Each of the second electrode series includes at least one electrode group, and the at least one electrode group includes two of the second electrodes. The two of the second electrodes are electrically connected to each other on a first surface of the substrate, and at least one of the two of the second electrodes is electrically connected to one of the second electrodes adjacent to the at least one of the two of the second electrodes.

Classes IPC  ?

• G06F 3/044 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens capacitifs

Abrégé

A device for detecting an audio interface includes a processing unit, a first audio interface transmitting circuit, and a second audio interface transmitting circuit. The processing unit is utilized to generate a clock signal and a word select (WS) signal. The first audio interface transmitting circuit is utilized to generate a first audio data according to the clock signal. The second audio interface transmitting circuit is utilized to generate a second audio data according to the clock signal and the WS signal. The processing unit switches to the first audio interface transmitting circuit if a voltage potential of the WS signal remains at a high voltage level or remains at a low voltage level longer than a predetermined period. The processing unit switches to the second audio interface transmitting circuit if the voltage potential of the WS signal changes during the predetermined period.

Classes IPC  ?

• G06F 3/16 - Entrée acoustiqueSortie acoustique
• H04B 14/02 - Systèmes de transmission non caractérisés par le milieu utilisé pour la transmission caractérisés par l'utilisation de la modulation par impulsions
• G06F 1/06 - Générateurs d'horloge produisant plusieurs signaux d'horloge

Abrégé

A frequency detector is used for detecting a frequency difference of a signal to be tested from a first time point to a second time point. The frequency detector includes: an alternating current coupled capacitor configured to receive the signal to be tested; a rectifying circuit electrically connected to the alternating current coupled capacitor; an analog-to-digital converter electrically connected to the rectifying circuit; a control unit electrically connected to the analog-to-digital converter; and a counter electrically connected to the rectifying circuit and the control unit, wherein the control unit is configured to calculate the frequency difference of the signal to be tested from the first time point to the second time point according to outputs of the analog-to-digital converter and outputs of the counter.

Classes IPC  ?

• H03D 13/00 - Circuits de comparaison de phase ou de fréquence de deux oscillations mutuellement indépendantes
• H03L 7/093 - Détails de la boucle verrouillée en phase concernant principalement l'agencement de détection de phase ou de fréquence, y compris le filtrage ou l'amplification de son signal de sortie utilisant des caractéristiques de filtrage ou d'amplification particulières dans la boucle
• G04F 10/00 - Appareils pour mesurer des intervalles de temps inconnus par des moyens électriques
• H01L 29/872 - Diodes Schottky

Abrégé

A touch system includes a touch panel; an active pen configured to generate a signal; and a touch controller electrically connected to the touch panel and configured to detect the signal. When the touch controller supports at least two protocols, a protocol of the touch controller is automatically switched to one of the at least two protocols. The active pen automatically detects the one of the at least two protocols, and a protocol of the active pen is switched to the one of the at least two protocols.

Classes IPC  ?

• G06F 3/041 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction
• G06F 3/044 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens capacitifs
• G06F 3/0354 - Dispositifs de pointage déplacés ou positionnés par l'utilisateurLeurs accessoires avec détection des mouvements relatifs en deux dimensions [2D] entre le dispositif de pointage ou une partie agissante dudit dispositif, et un plan ou une surface, p. ex. souris 2D, boules traçantes, crayons ou palets

Abrégé

A bidirectional active stylus and a sensing system are provided. The stylus includes a receiving electrode, a first emitting diode and a second emitting diode. The receiving electrode is configured to receive a synchronous signal from a touch pad. The receiving electrode is disposed at a position closer to the touch pad with respect to the first emitting diode and the second emitting diode. The strength of received signals is improved.

Classes IPC  ?

• G06F 3/0354 - Dispositifs de pointage déplacés ou positionnés par l'utilisateurLeurs accessoires avec détection des mouvements relatifs en deux dimensions [2D] entre le dispositif de pointage ou une partie agissante dudit dispositif, et un plan ou une surface, p. ex. souris 2D, boules traçantes, crayons ou palets
• G06F 3/038 - Dispositions de commande et d'interface à cet effet, p. ex. circuits d'attaque ou circuits de contrôle incorporés dans le dispositif
• G06F 3/044 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens capacitifs

Abrégé

A configurable amplifier module is disclosed. The configurable amplifier module includes a first amplifier having a non-inverting input, an inverting input, and a first output; a second amplifier having a non-inverting input, an inverting input, and a second output; a first resistor; a second resistor; a third resistor; a detecting unit connected to the second output of the second amplifier and configured to detect whether a current flows through the detecting unit; and a control unit connected to the second resistor and the detecting unit and configured to control the second resistor to be connected to the third resistor or a direct current signal.

Classes IPC  ?

• H03F 1/07 - Amplificateurs du type Doherty
• H03F 1/02 - Modifications des amplificateurs pour augmenter leur rendement, p. ex. étages classe A à pente glissante, utilisation d'une oscillation auxiliaire

Abrégé

An analog microphone and a control method thereof are disclosed. The analog microphone includes a sensor configured to sense an audio signal and convert the audio signal into an electrical signal; a charge pump configured to provide a bias voltage for the sensor to drive the sensor; a source follower configured to receive the electrical signal and convert the electrical signal into a source follower signal; a gain adjustable amplifier configured to receive the source follower signal, multiply the source follower signal by an amplifying factor, and output an amplified signal; and a detecting module configured to adaptively control the bias voltage of the charge pump and the amplified signal of the gain adjustable amplifier in response to the source follower signal of the source follower.

Classes IPC  ?

• H03G 3/30 - Commande automatique dans des amplificateurs comportant des dispositifs semi-conducteurs
• H03F 3/45 - Amplificateurs différentiels
• H04R 3/00 - Circuits pour transducteurs

Abrégé

A method for identifying tap events on a touch panel includes measuring vibration signals for tap events on the touch panel to collect the tap events and record types of the tap events as samples; generating a sample set including a plurality of samples; using the sample set to train a deep neural network to determine an optimized weighting parameter group; taking the deep neural network and the optimized weighting parameter group as a tapping classifier and deploying it to a touch-controlled end product; and obtaining a predicted tap type based on a vibration signal and an image formed by touch sensing values detected by the touch-controlled end product to which a tap operation is performed. The present disclosure also provides a system corresponding to the identifying method, and a touch-controlled end product.

Classes IPC  ?

• G06F 3/041 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction
• G06F 3/01 - Dispositions d'entrée ou dispositions d'entrée et de sortie combinées pour l'interaction entre l'utilisateur et le calculateur
• G06F 3/0488 - Techniques d’interaction fondées sur les interfaces utilisateur graphiques [GUI] utilisant des caractéristiques spécifiques fournies par le périphérique d’entrée, p. ex. des fonctions commandées par la rotation d’une souris à deux capteurs, ou par la nature du périphérique d’entrée, p. ex. des gestes en fonction de la pression exercée enregistrée par une tablette numérique utilisant un écran tactile ou une tablette numérique, p. ex. entrée de commandes par des tracés gestuels
• G06N 3/02 - Réseaux neuronaux

Abrégé

A novel method is proposed to operate a stylus product. In this method, inertial measurement unit (IMU) signals are used to estimate a tilted angle of the stylus product. On the other hand, acceleration signals measured when a finger taps a stylus are collected to train a deep neural network as a tap classifier. A combination of the tilted angle and the tap classifier allows a user to interact with a peripheral device (e.g. a touchscreen) by rotating and taping the stylus product. A tap classifying system and a stylus product are also provided.

Classes IPC  ?

• G06F 3/0346 - Dispositifs de pointage déplacés ou positionnés par l'utilisateurLeurs accessoires avec détection de l’orientation ou du mouvement libre du dispositif dans un espace en trois dimensions [3D], p. ex. souris 3D, dispositifs de pointage à six degrés de liberté [6-DOF] utilisant des capteurs gyroscopiques, accéléromètres ou d’inclinaison
• G06F 3/041 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction
• G06F 3/0354 - Dispositifs de pointage déplacés ou positionnés par l'utilisateurLeurs accessoires avec détection des mouvements relatifs en deux dimensions [2D] entre le dispositif de pointage ou une partie agissante dudit dispositif, et un plan ou une surface, p. ex. souris 2D, boules traçantes, crayons ou palets
• G05B 13/00 - Systèmes de commande adaptatifs, c.-à-d. systèmes se réglant eux-mêmes automatiquement pour obtenir un rendement optimal suivant un critère prédéterminé
• G06N 3/02 - Réseaux neuronaux

Abrégé

A circuit for touch sensing includes a driving unit, a self-capacitive sensor circuit, a mutual-capacitive sensor circuit and a control circuit. The driving is configured to generate a driving signal. The self-capacitive sensor circuit is configured to generate a self-capacitance sensing result. The mutual-capacitive sensor circuit is configured to receive the driving signal in order to generate a mutual-capacitance sensing result when the voltage of a node between the self-capacitive sensor circuit and the mutual-capacitive sensor circuit reaches a reference voltage. The control circuit receives and computes the self-capacitance sensing result and the mutual-capacitance sensing result in order to generate a sensing result. By utilizing the circuit for touch sensing of present disclosure, the accuracy and the efficiency of touch sensing can be enhanced.

Classes IPC  ?

• G06F 3/041 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction
• G06F 3/044 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens capacitifs

Abrégé

A capacitive touch system and a sensing method thereof are disclosed. The capacitive touch system includes a touch panel including a plurality of driving electrodes and a plurality of sensing electrodes; a touch control chip; and an external device configured to transmit data to the touch control chip. In a position detection mode, the touch control chip drives the driving electrodes, reads a sensing signal from the sensing electrodes, and determines a position of a touch according to the sensing signal. In a data receiving mode, the touch control chip receives the data transmitted by the external device after a time delay period. In the capacitive touch system and the sensing method thereof, the position detection mode and the data receiving mode can be sequentially performed by delaying the time period.

Classes IPC  ?

• G06F 3/044 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens capacitifs
• G06F 3/047 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction utilisant un ensemble de fils conducteurs, p. ex. des fils conducteurs croisés
• G06F 3/041 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction
• G06F 3/0354 - Dispositifs de pointage déplacés ou positionnés par l'utilisateurLeurs accessoires avec détection des mouvements relatifs en deux dimensions [2D] entre le dispositif de pointage ou une partie agissante dudit dispositif, et un plan ou une surface, p. ex. souris 2D, boules traçantes, crayons ou palets

Abrégé

A capacitive touch system and a sensing method thereof are disclosed. The capacitive touch system includes a touch panel; a touch control chip; and an active pen which includes a receiving part, a transmitting part, a control unit, and a pressure sensing element. The control unit controls the transmitting unit to output a pen driving signal according to a pen sensing signal. The pressure sensing element detects a pen pressure signal. The control unit outputs a voltage signal in responsive to the pen pressure signal after a time delay period. In the capacitive touch system and the sensing method thereof, the active pan is not required to be paired with the touch panel.

Classes IPC  ?

• G06F 3/044 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens capacitifs
• G06F 3/041 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction
• G06F 3/0354 - Dispositifs de pointage déplacés ou positionnés par l'utilisateurLeurs accessoires avec détection des mouvements relatifs en deux dimensions [2D] entre le dispositif de pointage ou une partie agissante dudit dispositif, et un plan ou une surface, p. ex. souris 2D, boules traçantes, crayons ou palets

Abrégé

An active stylus pen comprises a touch component and a pressure sensing module. One end of the touch component is disposed at a nib part of the active stylus pen, wherein the touch component is configured to receive an external pressure. The pressure sensing module is connected to the touch component, wherein the pressure sensing module is configured to generate an oscillation signal, wherein the oscillation signal has a first frequency when the touch component receives the external pressure and the external pressure reaches a first threshold value, and wherein the oscillation signal is adjusted to have a second frequency when the touch component receives the external pressure and the external pressure does not reach the first threshold value; wherein a difference of the first frequency and the second frequency is larger than a second threshold value.

Classes IPC  ?

• G06F 3/038 - Dispositions de commande et d'interface à cet effet, p. ex. circuits d'attaque ou circuits de contrôle incorporés dans le dispositif
• G06F 3/041 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction
• G06F 3/0354 - Dispositifs de pointage déplacés ou positionnés par l'utilisateurLeurs accessoires avec détection des mouvements relatifs en deux dimensions [2D] entre le dispositif de pointage ou une partie agissante dudit dispositif, et un plan ou une surface, p. ex. souris 2D, boules traçantes, crayons ou palets

Abrégé

th boosting circuit to a second clock terminal or to the ground terminal according to the control signal of the control circuit.

Classes IPC  ?

• H02M 3/07 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des résistances ou des capacités, p. ex. diviseur de tension utilisant des capacités chargées et déchargées alternativement par des dispositifs à semi-conducteurs avec électrode de commande

Abrégé

A sensing device comprises a charge pump, a MEMS sensor, a source follower and a PGA. The charge pump is configured to provide a pump voltage. The MEMS sensor is electrically connected to the charge pump and configured to generate an input voltage according to environment variations. The source follower is electrically connected to the MEMS sensor and configured to generate a followed reference voltage according to the pump voltage and to generate a followed input voltage according to the input voltage. The PGA has an input end of the PGA electrically connected to the source follower and is configured to generate two-ended differential output voltages outputted through a first output end and a second output end according to a difference between the followed reference voltage and the followed input voltage.

Classes IPC  ?

• H04R 3/00 - Circuits pour transducteurs
• H04R 19/00 - Transducteurs électrostatiques
• H04R 19/04 - Microphones

Abrégé

A source follower includes a first transistor, a first output module, a second transistor, a second output module and a feedback module. The first terminal and the control terminal of the first transistor are configured to respectively receive a first base voltage and a first control voltage. The second terminal of the first transistor and the first output module are electrically connected to a first output terminal. The first terminal and the control terminal of the second transistor are configured to respectively receive a first base voltage and a second control voltage. The second terminal of the second transistor and the second output module are electrically connected to a second output terminal. The feedback module is electrically connected to the control terminal of the first transistor, the control terminal of the second transistor and a reference node of the second output module.

Classes IPC  ?

• H03F 1/14 - Modifications des amplificateurs pour réduire l'influence défavorable de l'impédance interne des éléments amplificateurs par utilisation de moyens de neutrodynage
• H03F 1/34 - Circuits à contre-réaction avec ou sans réaction
• H03F 1/32 - Modifications des amplificateurs pour réduire la distorsion non linéaire
• H03F 3/345 - Amplificateurs de courant continu dans lesquels tous les étages sont couplés en courant continu comportant uniquement des dispositifs à semi-conducteurs comportant des dispositifs à effet de champ
• H03F 3/50 - Amplificateurs dans lesquels le signal d'entrée est appliqué — ou le signal de sortie est recueilli — sur une impédance commune aux circuits d'entrée et de sortie de l'élément amplificateur, p. ex. amplificateurs dits "cathodynes"
• H03K 5/02 - Mise en forme d'impulsions par amplification
• H03F 3/347 - Amplificateurs de courant continu dans lesquels tous les étages sont couplés en courant continu comportant uniquement des dispositifs à semi-conducteurs dans des circuits intégrés

Abrégé

A sensing device includes a MEMS sensor and an adjustable amplifier. The MEMS sensor is configured to generate an input signal according to environmental changes. The adjustable amplifier has a first input terminal, a second input terminal, a third input terminal, a fourth input terminal and a first output terminal. The first input terminal is electrically connected to the MEMS sensor for receiving the input signal. The second input terminal is electrically connected to a first signal terminal for receiving a first common-mode signal. The third input terminal is electrically connected to the first output terminal. The fourth input terminal is electrically connected to a second signal terminal. An electric potential of a first output signal output by the first output terminal of the adjustable amplifier is related to electric potentials of the input signal, the first signal terminal and the second signal terminal.

Classes IPC  ?

• B81B 7/00 - Systèmes à microstructure
• B81B 7/02 - Systèmes à microstructure comportant des dispositifs électriques ou optiques distincts dont la fonction a une importance particulière, p. ex. systèmes micro-électromécaniques [SMEM, MEMS]
• B81C 1/00 - Fabrication ou traitement de dispositifs ou de systèmes dans ou sur un substrat
• G05F 3/02 - Régulation de la tension ou du courant
• H02M 3/07 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des résistances ou des capacités, p. ex. diviseur de tension utilisant des capacités chargées et déchargées alternativement par des dispositifs à semi-conducteurs avec électrode de commande
• H03H 9/10 - Montage dans des boîtiers
• G06G 7/184 - Dispositions pour l'exécution d'opérations de calcul, p. ex. amplificateurs spécialement adaptés à cet effet pour l'intégration ou la différentiation utilisant des éléments capacitifs
• G01N 27/414 - Transistors à effet de champ sensibles aux ions ou chimiques, c.-à-d. ISFETS ou CHEMFETS
• G01P 15/125 - Mesure de l'accélérationMesure de la décélérationMesure des chocs, c.-à-d. d'une variation brusque de l'accélération en ayant recours aux forces d'inertie avec conversion en valeurs électriques ou magnétiques au moyen de capteurs à capacité

Abrégé

A programmable gain amplifier includes an active load module, a first differential pair, a second differential pair and a power source module. The first and second differential pairs are electrically connected to the active load module. The power source module is electrically connected to the first current source end of the first differential pair and the second current source end of the second differential pair. The power source module supplies a first current to the first differential pair through the first current source end. The power source module supplies a second current to the second differential pair through the second current source end. The power source module adjusts the potential of the first current, the potential of the second current, or both.

Classes IPC  ?

• H03G 1/00 - Détails des dispositions pour le réglage de l'amplification
• H03F 1/02 - Modifications des amplificateurs pour augmenter leur rendement, p. ex. étages classe A à pente glissante, utilisation d'une oscillation auxiliaire
• H03F 1/26 - Modifications des amplificateurs pour réduire l'influence du bruit provoqué par les éléments amplificateurs
• H03F 3/45 - Amplificateurs différentiels
• H03G 3/00 - Commande de gain dans les amplificateurs ou les changeurs de fréquence

Abrégé

A sensing device includes a micro-electromechanical sensor, a source follower and an amplifier. The source follower includes a first output module including a first transistor and a second transistor. The micro-electromechanical sensor is configured to generate an input signal. A first terminal of the first transistor is configured to receive a first reference voltage. A second terminal and a control of the first transistor are electrically connected to the first output terminal and to a first current source respectively. A first terminal and a second terminal of the second transistor are electrically connected to the second terminal and the control terminal of the first transistor respectively. A control terminal of the second transistor is configured to receive the input signal. A first input terminal and a second input terminal of the amplifier are electrically connected to a first output terminal configured to receive a common-mode voltage respectively.

Classes IPC  ?

• B81B 7/00 - Systèmes à microstructure
• B81B 7/04 - Réseaux ou matrices de dispositifs à microstructure semblables
• H04R 3/04 - Circuits pour transducteurs pour corriger la fréquence de réponse
• G01R 17/04 - Dispositions dans lesquelles la valeur à mesurer est automatiquement comparée à une valeur de référence dans lesquelles la valeur de référence est l'objet d'un balayage continu ou périodique dans l'intervalle des valeurs à mesurer
• H02M 3/07 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des résistances ou des capacités, p. ex. diviseur de tension utilisant des capacités chargées et déchargées alternativement par des dispositifs à semi-conducteurs avec électrode de commande

Abrégé

A touch detection method is applied to a touch panel including sensing units and includes: detecting sensing values corresponding to the sensing units; selecting a first sensing value that is a local maximum among the sensing values; determining a first sensing unit corresponding to the first sensing value among the sensing units; selecting from the sensing units a second sensing unit located at the first side of the first sensing unit; selecting from the sensing values a second sensing value corresponding to the second sensing unit; and generating a touch coordinate according to the first sensing value, the second sensing value, a touch sensing value distribution model, and the coordinate of the first sensing unit.

Classes IPC  ?

• G06F 3/045 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction utilisant des éléments résistifs, p. ex. une seule surface uniforme ou deux surfaces parallèles mises en contact
• G06F 3/041 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction
• G06F 3/044 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens capacitifs

Abrégé

An encoding-locked method for audio processing for audio receiving device includes the following steps: inserting a first encryption key into a first digital signal stream so as to obtain a second digital signal stream, checking whether there is the first encryption key in a received digital signal stream so as to determine whether the received digital signal stream is the second digital signal stream, and when the received digital signal stream is not the second digital signal stream, no processing the received digital signal stream.

Classes IPC  ?

• G06F 21/60 - Protection de données
• H04L 29/06 - Commande de la communication; Traitement de la communication caractérisés par un protocole
• G06F 21/72 - Protection de composants spécifiques internes ou périphériques, où la protection d'un composant mène à la protection de tout le calculateur pour assurer la sécurité du calcul ou du traitement de l’information dans les circuits de cryptographie
• H04L 9/14 - Dispositions pour les communications secrètes ou protégéesProtocoles réseaux de sécurité utilisant plusieurs clés ou algorithmes
• G10L 25/84 - Détection de la présence ou de l’absence de signaux de voix pour différencier la parole du bruit
• G11B 20/00 - Traitement du signal, non spécifique du procédé d'enregistrement ou de reproductionCircuits correspondants

Abrégé

The disclosure provides an active stylus pen and signal transmission methods for the active stylus pen and a touch panel. The stylus has a touch module, a switching module, a signal comparison module, a control module and a pressure sensing module. The stylus determines a first signal generated by a touch panel, and compares an intensity of the first signal and a reference value through a first transmission path. When the intensity of the first signal exceeds the reference value, the stylus outputs a second signal to the touch panel. After the stylus outputs the second signal to the touch panel, the stylus switches to a second transmission path from the first transmission path. The stylus outputs a header signal to the touch panel. When determining a first time sequential distribution, the stylus outputs at least one bit of a pressure signal according to a second time sequential distribution.

Classes IPC  ?

• G06F 3/038 - Dispositions de commande et d'interface à cet effet, p. ex. circuits d'attaque ou circuits de contrôle incorporés dans le dispositif
• G06F 3/041 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction
• G06F 3/044 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens capacitifs
• G06F 3/0354 - Dispositifs de pointage déplacés ou positionnés par l'utilisateurLeurs accessoires avec détection des mouvements relatifs en deux dimensions [2D] entre le dispositif de pointage ou une partie agissante dudit dispositif, et un plan ou une surface, p. ex. souris 2D, boules traçantes, crayons ou palets

Abrégé

A power management apparatus and a power management method are provided. The method includes the following steps. Conduct a first current path during a first period. Provide a first voltage to an operation end when the first current path conducts and a microprocessor is disabled. The first voltage is used to selectively conduct a second path during the first period. Provide a second voltage to the microprocessor when the second current path conducts. The second voltage is used to turn on the microprocessor. Provide a third voltage to the operation end by the microprocessor when the microprocessor is turned on. The third voltage is used to keep the second current path conducted.

Classes IPC  ?

• G06F 1/00 - Détails non couverts par les groupes et
• G06F 1/32 - Moyens destinés à économiser de l'énergie

Abrégé

An on-chip temperature sensing device is disclosed. The disclosed on-chip temperature sensing device is capable of sensing an environmental temperature of the chip. The device comprises a reference generating circuit, a first oscillator, a second oscillator, and an arithmetic logic unit. The reference generating circuit is configured to generate a first control voltage to control the first oscillator and the second oscillator. The bias current of the first oscillator and the bias current of the second oscillator are both controlled by the first control voltage so that the bias current of the first oscillator is directly proportional the bias current of the second oscillator regardless the environmental temperature. The first oscillator generates a first oscillation signal, while the second oscillator generates a second oscillation signal. The arithmetic logic unit may calculate the environmental temperature according to the first oscillation signal and the second oscillation signal.

Classes IPC  ?

• G01K 7/01 - Mesure de la température basée sur l'utilisation d'éléments électriques ou magnétiques directement sensibles à la chaleur utilisant des éléments semi-conducteurs à jonctions PN
• H03K 3/03 - Circuits astables
• H03K 3/0231 - Circuits astables

Abrégé

A capacitive touch device and a sensing method thereof are disclosed. The capacitive touch device includes a touch panel, at least one touch detection unit and a processing unit. The touch detection unit scans the touch panel, obtains an N-bit sensed data and compresses the N-bit sensed data to an L-bit sensed data. The processing unit receives the L-bit sensed data, decompresses the L-bit sensed data to the N-bit sensed data and calculates a coordinate of a touch according to the N-bit sensed data. The present invention is capable of decreasing the time for transmitting the sensed data, the power consumption and the requirements for the memory capacity of the touch detection unit and the memory capacity of the processing unit.

Classes IPC  ?

• G06F 3/044 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens capacitifs
• G06F 3/041 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction

Abrégé

A capacitive touch device and a sensing method thereof are disclosed. The capacitive touch device includes a touch panel and a plurality of touch detection units. The touch panel includes first sensing lines and second sensing lines. The position of a touch between a last one of the first sensing lines and a first one of the second sensing lines is calculated according to sensed values respectively corresponding to a first sensing line prior to the last one of the first sensing lines, the last one of the first sensing lines and the first one of the second sensing lines. The present invention is capable of avoiding the problem that the frame rate is reduced significantly because of the data transmission between the first and second touch detection units.

Classes IPC  ?

• G06F 3/045 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction utilisant des éléments résistifs, p. ex. une seule surface uniforme ou deux surfaces parallèles mises en contact
• G06F 3/044 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens capacitifs
• G06F 3/041 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction

Abrégé

A touch input device provided in the present invention includes a pen tip, a pressure sensing module, a control unit and a PWM generator. The pen tip is utilized to touch a capacitive touchscreen and conduct a touchscreen driving signal. The pressure sensing module is utilized to generate a pressure sensing signal which corresponds to a pressure of the pen tip on the capacitive touchscreen. The control unit is utilized to receive the touchscreen driving signal and the pressure sensing signal, and then to generate a PWM control signal according to the pressure sensing signal. Further, a pulse width of the PWM control signal is proportional to the pressure. The PWM generator is utilized to provide a PWM signal to the pen tip according to the PWM control signal. A touch input system is further provided in the present invention.

Classes IPC  ?

• G06F 3/044 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens capacitifs
• G06F 3/0354 - Dispositifs de pointage déplacés ou positionnés par l'utilisateurLeurs accessoires avec détection des mouvements relatifs en deux dimensions [2D] entre le dispositif de pointage ou une partie agissante dudit dispositif, et un plan ou une surface, p. ex. souris 2D, boules traçantes, crayons ou palets

Abrégé

An apparatus and method for multiplying frequency of a clock signal are provided, wherein the apparatus provides an initial oscillator signal, compares the initial oscillator signal with a reference signal to generate a first control signal, selectively outputs one of at least one lower threshold value and at least one upper threshold value from a threshold value generation circuit to a clock output circuit according to at least the first control signal, and updates an output clock signal through a digital and logical module processing the comparison of the initial oscillator signal and the selected one of the at least one upper and lower threshold values and the comparison of the initial oscillator signal and a low level signal.

Classes IPC  ?

• H03K 21/00 - Détails de compteurs d'impulsions ou de diviseurs de fréquence
• H03K 23/00 - Compteurs d'impulsions comportant des chaînes de comptageDiviseurs de fréquence comportant des chaînes de comptage
• H03K 25/00 - Compteurs d'impulsions avec intégration pas à pas et accumulation statiqueDiviseurs de fréquence analogues

Abrégé

An automatic self-calibrated oscillation method and an apparatus using the same are provided. After a static time tuning (STT) table and a run time tuning (RTT) table have been established, the apparatus converts an output clock signal to generate a current RTT value at every predefined time and then compares the current RTT value with a reference RTT value generated in response to a STT value of the STT table, or with an interpolated result generated in response to the reference RTT value to generate a deviation value. Thus, through the deviation value, the output clock signal may be calibrated to address the target frequency without the assistance of external reference clock unit or locked loop unit after the STT table and the RTT table are established.

Classes IPC  ?

• H03L 7/00 - Commande automatique de fréquence ou de phaseSynchronisation

Abrégé

A method of reducing computation of water tolerance by projecting touch data is disclosed, targeting the handheld devices. The method targets first at obtaining a difference array, followed by extracting minimum values of rows and columns of the difference array to obtain a row projection list and a column projection list respectively. By repeated implementing of mutual capacitance detection, ghost water blocks can be wiped out from the multiple water blocks. Once integrating with a local spatial boundary detection algorithm, the sensed signals of intended input located within a rectangular water block yet beyond a real water block are consequently detected. The computational algorithm of the water tolerance of this invention is successfully built into the touch panel controller due to its substantially reduced computation.

Classes IPC  ?

• G06F 3/045 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction utilisant des éléments résistifs, p. ex. une seule surface uniforme ou deux surfaces parallèles mises en contact
• G06F 3/041 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction
• G06F 3/044 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens capacitifs

Abrégé

A sensing device placed in a touch sensing system of a display device includes a selector, a sensing module, and a detection module for determining touch signals generated by the touch sensing system. The selector selects two of the touch signals according to at least one selection control signal. The sensing module comprises a first differential amplifier for comparing the selected touch signals and producing a first differential signal according to first control signals. According to second control signals, the detection module receives the first differential signal, generates an averaged sensing value and a reference value, and compares the averaged sensing value with the reference value to produce a second differential signal. Thereby, the touch sensing system uses the second differential signal to generate the first control signals and the second control signals to control the operation of the touch sensing system.

Classes IPC  ?

• G06F 3/041 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction

Abrégé

A method for calculating a touch coordinate on a touch panel is provided, the touch panel having a plurality of points, said method comprising: determining a group of candidate points when a touch occurs on the touch panel, each candidate point having one sensing value; assigning weights to the sensing values of the respective candidate points to obtain weighted sensing values; and calculating a coordinate by utilizing the weighted sensing values and positions of the respective candidate points. By using said method, the calculation result of the touch coordinate will be more stable.

Classes IPC  ?

• G06F 3/041 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction

Abrégé

A ghost cancellation method for the multi-touch sensitive device is disclosed. The multi-touch sensitive device includes a sensing array having multiple lines of a first axis and multiple lines of a second axis intersecting with each other. All the lines of the sensing array are scanned to determine which ones of the lines are touched, so as to determine touch point candidates. For each touch point candidate, a driving signal is applied to the line of the first axis, and the line of the second axis is detected to check if the touch point candidate is actually touched.

Classes IPC  ?

• G06F 3/041 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction

Abrégé

A touch sensing method for detecting positions of touching is disclosed. In the present invention, a reference touch profile is provided. A variable ideal combination profile indicating multiple touches is obtained by synthesizing a plurality of reference touch profiles at different positions. The variable ideal combination profile is matched with a sensing signal. Actual touch positions can be identified from the sensing signal when the matching of the variable ideal combination profile with the sensing signal is optimal.

Classes IPC  ?

• G06F 3/045 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction utilisant des éléments résistifs, p. ex. une seule surface uniforme ou deux surfaces parallèles mises en contact

Abrégé

A touch display apparatus is disclosed. Without additional touch device, either the reversed AM structure or a conventional PM structure is provided to combine with the human body's conductive properties and the noise-immune sensing circuit design, thereby to achieve the purpose of displaying images and performing multi-touch detection simultaneously. Thus, the hardware cost and the power consumption are reduced.

Classes IPC  ?

• G06F 3/041 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction

Abrégé

An electronic device includes a touch panel, a driving circuit, and a sensing circuit. The driving circuit generates a driving signal, and superposes phase information on the driving signal. The touch panel includes multiple crossing conductors, for providing a sensing signal in response to a contact of an object on one of the sensing conductors and to a driving signal applied on the sensing element. The sensing circuit includes a signal extractor and a tag detector. The signal extractor generates a demodulation signal based on the period of the driving signal, width of the phase information, and for demodulating the sensing signal by using the demodulation signal to determine a sensing value. The tag detector enables the signal extractor as soon as a magnitude of the sensing signal is over a predetermined threshold. The signal demodulates the sensing signal by using a demodulation signal whose period is the same as the driving signal to determine the sensing value. The present electronic device can determine a touch position by processing of analog signal using the demodulation signal without phase compensation.

Classes IPC  ?

• G06F 3/041 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction

Abrégé

A touch detecting device comprises at least one driving circuit, a plurality of conductive lines and at least one sensing circuit. The originally available conductive lines of a touch panel are used to detect a finger touch by means of detecting a current leakage through the finger to the ground. Thus, the invention can reduce the hardware cost, avoid noise interference and correctly respond to a finger touch.

Classes IPC  ?

• G06F 3/041 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction
• G06F 3/033 - Dispositifs de pointage déplacés ou positionnés par l'utilisateurLeurs accessoires
• G06F 3/044 - Numériseurs, p. ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens capacitifs
• G09G 5/00 - Dispositions ou circuits de commande de l'affichage communs à l'affichage utilisant des tubes à rayons cathodiques et à l'affichage utilisant d'autres moyens de visualisation
• G08C 21/00 - Systèmes de transmission de position d'un objet par rapport à un système de références prédéterminé, p. ex. système téléautographique

Abrégé

An ESD protection circuit is disclosed. The ESD protection circuit includes a stacked MOS circuit and a trigger current generating circuit. The trigger current generating circuit will generate trigger signal(s) to turn on the stacked MOS circuit under ESD stress condition. The ESD voltage can thus be discharged through the current path formed by the stacked MOS circuit. A lower trigger voltage is achieved by technologies disclosed, which will make an integrated circuit more sensitive to ESD.

Classes IPC  ?

• H02H 3/22 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à un excès de tension de courte durée, p. ex. foudre

Abrégé

A diversity receiver includes N number of Fourier transform circuits, N number of channel estimators, N number of match filters, N number of soft demappers, a combination/selection unit, and a channel decoder. The diversity receiver merges the square of the absolute value of estimate channel frequency response and transmission data into a demodulation signal and then outputs the demodulation signal by means of the match filter.

Classes IPC  ?

• H04K 1/02 - Communications secrètes par addition d'un second signal pour rendre le signal désiré inintelligible
• H04L 1/00 - Dispositions pour détecter ou empêcher les erreurs dans l'information reçue

Abrégé

The invention relates to an ESD protection with ability to enhance trigger-on speed of a low voltage Triggered PNP (LVTPNP) unit for protecting internal circuits of an integrated circuit from attack of an ESD stress. The ESD protection unit incorporates either detection circuit or power clamp circuit to efficiently trigger on a trigger node as a heavily doped region of LVTPNP devices among an I/O pad, a VDD pin and a VSS pin. As soon as the trigger node of each LVTPNP device receives a trigger signal from either the ESD detection circuit or power clamp circuit, the threshold voltage of the LVTPNP devices are capable of being therefore reduced to enhance trigger-on speed of the LVTPNP devices that discharge ESD current.

Classes IPC  ?

• H02H 9/00 - Circuits de protection de sécurité pour limiter l'excès de courant ou de tension sans déconnexion

Abrégé

The present invention discloses re-configurable data transmission ports with data-integrity transaction controlling unit in a computerized computer and the method for performing the same. The controlling unit further includes a port-configuration detecting mechanism and a buffer-configuration subunit. The port-configuration detecting mechanism can inspect configuration status of all of the first ports on variance of data transmission bandwidths, e.g. “merge” or “spilt” status. The buffer-configuration subunit upon different configuration status of each first port configures each retry buffer. When a specific first port is configured on “merge” status, the buffer-configuration subunit can follows up to configure the retry buffer owned by the specific first port and the retry buffers owned but disused by the other first ports to constitute a buffer group with merging of storing spaces of said configured retry buffers. The controlling unit sequentially backs up a data on the buffer group upon the data is transmitted from the specific first port to a corresponding second port. If the specific first port receives a non-acknowledge (NAK) message or nothing from the corresponding second port within a specific time, the data is retransmitted from the buffer group to the corresponding second port. If the specific first port exactly receives an acknowledge (ACK) message from the corresponding second port, the data is cleaned from the buffer group.

Classes IPC  ?

• G06F 11/00 - Détection d'erreursCorrection d'erreursContrôle de fonctionnement

Abrégé

A rate control method with region of interesting support, which coding macroblocks in a current picture with different priority. The rate control method calculates a weighted macroblock activity according to the priority and a macroblock activity and a picture activity for the current picture according to the weighted macroblock activity. Then, the method allocates a bit budget for each macroblock according to the priority and calculates an estimated complexity for the current picture according to a complexity of a previously coded picture, an activity of the previously coded picture and the weighted macroblock activity. The method also calculates an estimated quantizer scale according to the estimated complexity and the bit budget, an initial virtual buffer occupancy according to an reaction factor and the estimated quantizer scale and a macroblock quantizer scale according to a virtual buffer occupancy of a previously coded macroblock, the priority and the reaction factor. The method codes each macroblock according to the macroblock quantizer scale and updates a virtual buffer occupancy of the current coded macroblock according to a used bit of the coded macroblock, the virtual buffer occupancy of the previously coded macroblock and the bit budget of current coded macroblock.

Classes IPC  ?

• H04N 7/12 - Systèmes dans lesquels le signal de télévision est transmis par un canal ou une pluralité de canaux parallèles, la bande passante de chaque canal étant inférieure à la largeur de bande du signal de télévision

Abrégé

A metric generation scheme for use in OFDM receivers. In a preferred embodiment, an OFDM receiver of the invention includes a dynamic quantizer to compress a series of channel-state information values. Also, a bit de-interleaver is provided to de-interleave a series of symbol-based data inverse to interleaving operations at a transmitter end. The de-interleaved symbol-based data is further compressed by another dynamic quantizer to yield a complex signal according to a constellation scheme. Then a metric generator calculates a bit metric of a zero group and a bit metric of a one group for each received bit in which the constellation is divided into the one group and the zero group for each bit location.

Classes IPC  ?

• H03M 13/00 - Codage, décodage ou conversion de code pour détecter ou corriger des erreursHypothèses de base sur la théorie du codageLimites de codageMéthodes d'évaluation de la probabilité d'erreurModèles de canauxSimulation ou test des codes
• H03K 9/00 - Démodulation d'impulsions qui ont été modulées par un signal à variation continue
• H04L 27/06 - Circuits de démodulationCircuits récepteurs

Abrégé

A frequency offset compensation estimation system and method for a wireless local area network. First, a preamble sequence of a frequency package is sent to a frequency offset estimation (FOE) device so that an initial frequency offset signal amount is obtained and sent to the frequency offset compensation (FOE) device for compensation. Then, the compensated signal is sent to a frequency offset residual phase estimation (FOS RPE) device so as to calculate an offset amount of the frequency and send it to the frequency offset residual phase compensation (FOS RPC) device for compensation. The present invention mainly employs a residual frequency offset estimation device (Residual FOE device) to estimate the residual frequency offset signal of each of the frequency signals compensated by the frequency compensation device and feedback it to the frequency compensation device for compensation. Therefore, the operation load of the frequency offset residual phase compensation (FOS RPC) device will be reduced so as to improve the operation efficiency of the system.

Classes IPC  ?

• H04L 27/06 - Circuits de démodulationCircuits récepteurs

Abrégé

A quantization matrix adjusting method for quality improvement by scaling down the default quantization matrix. The adjusting method comprises the steps of: updating a used bits BB_X and an average quantizer scale Avg_Q; allocating a bit budget BB_C for a current picture; calculating an estimated quantizer scale EstQ_C according to the used bits BB_X, the average quantizer scale Avg_Q and the bit budget BB_C deciding the operation mode, when the estimated quantizer scale EstQ_C is smaller than a threshold Th_Q, assigning the operation mode as an adjusting mode, otherwise remaining at normal mode; scaling down a default quantization matrix as a new quantization matrix when the operation mode is the adjusting mode; and coding the current picture using the new quantization matrix and default quantization matrix in the adjusting mode and normal mode, respectively.

Classes IPC  ?

• G06K 9/36 - Prétraitement de l'image, c. à d. traitement de l'information image sans se préoccuper de l'identité de l'image
• G06K 9/38 - Quantification du signal image analogique
• H04B 1/66 - Détails des systèmes de transmission, non couverts par l'un des groupes Détails des systèmes de transmission non caractérisés par le milieu utilisé pour la transmission pour réduire la largeur de bande des signauxDétails des systèmes de transmission, non couverts par l'un des groupes Détails des systèmes de transmission non caractérisés par le milieu utilisé pour la transmission pour améliorer l'efficacité de la transmission

Abrégé

A method of mode detection for OFDM signals. The method comprises the steps of delaying the OFDM signal for a first and second number of samples, multiplying the two delayed signals by coefficient signals, and deriving a sum of the two products, deriving an error signal by subtracting the sum of the two products from the OFDM signal, extracting amplitudes of the coefficient signals, and accordingly deriving step size signals, updating the coefficient signals according to the error signal and step size signals, detecting edges of the amplitudes of the coefficient signals, and determining the guard interval length and transmission mode according to the detected edges.

Classes IPC  ?

• H04J 11/00 - Systèmes multiplex orthogonaux

Abrégé

A frequency synchronization apparatus and method for OFDM systems. The frequency synchronization apparatus is comprised of a digital mixer, a first synchronizer and a second synchronizer. The digital mixer acquires a baseband signal by means of a local frequency and adjusts the local frequency in response to an integer frequency offset and a fractional frequency offset. The first synchronizer takes a sequence of received samples derived from the baseband signal in a time domain to estimate the fractional frequency offset. The fractional frequency offset is fed back to the digital mixer. After that, the second synchronizer takes a sequence of demodulated symbols derived from the baseband signal in a frequency domain. The second synchronizer yields the integer frequency offset through a coarse search stage and a fine search stage. Then, the integer frequency offset is fed back to the digital mixer.

Classes IPC  ?

• H04L 7/00 - Dispositions pour synchroniser le récepteur avec l'émetteur
• H04J 3/06 - Dispositions de synchronisation
• H04J 11/00 - Systèmes multiplex orthogonaux

Abrégé

A method for estimating channels of an OFDM signal. The method comprises the steps of deriving responses of pilot channels, deriving responses of first data channels by time and frequency domain combined linear interpolation among the responses of the pilot channels, deriving each response of boundary channels by frequency domain linear interpolation between the responses of the nearest pilot and first data channels, and deriving responses of second data channels by frequency domain extrapolation using the responses of the pilot and first data channels.

Classes IPC  ?

• H04K 1/10 - Communications secrètes en utilisant deux signaux transmis simultanément ou successivement
• H04L 27/28 - Systèmes utilisant des codes à fréquences multiples à émission simultanée de fréquences différentes, chacune représentant un élément de code

Produits et services

Chips and chipsets.