Abstract

A motor operating system includes a parameter-setting module and a control circuit. The parameter-setting module generates a first parameter-setting corresponding to a first operating stage through a user interface, and determines whether a first operating status conforms to a first threshold setting. The control circuit is coupled to a motor, receives the first parameter-setting corresponding to the first operating status, drives the motor according to a first driving signal corresponding to the first parameter-setting, and outputs the first operating status corresponding to the first driving signal. When the first operating status does not conform the first threshold setting, the parameter-setting module generates an adjusted first parameter-setting. When the first operating status conforms the first threshold setting, the parameter-setting module sets the first parameter-setting as a first optimal parameter-setting.

IPC Classes  ?

• H02P 31/00 - Arrangements for regulating or controlling electric motors not provided for in groups , or
• H02P 23/14 - Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
• H02P 23/00 - Arrangements or methods for the control of AC motors characterised by a control method other than vector control

Abstract

A signal transceiving device includes a transceiver and a microprocessor. The transceiver receives a signal from a power line. The microprocessor performs correlation calculation for the signal with a first predetermined pattern to obtain a plurality of first calculation results, performs correlation calculation for the signal with a second predetermined pattern to obtain a plurality of second calculation results, generates a plurality of weighting values according to the first calculation results and determines a position of a synchronization point in the signal according to the weighting values. When the weighting value corresponding to a sample point of the signal satisfies a first condition and the second calculation result corresponding to the sample point satisfies a second condition, the microprocessor determines to use the sample point as the synchronization point.

IPC Classes  ?

• H04L 7/04 - Speed or phase control by synchronisation signals
• H04B 3/54 - Systems for transmission via power distribution lines

Abstract

A short-circuit detection circuit is adapted to a full-bridge driver which includes the first and second high-side transistors respectively coupled from a supply voltage to the first and second output nodes and the first and second low-side transistors respectively coupled from the first and second output nodes to a ground. The short-circuit detection circuit includes the first and second voltage dividers respectively receiving voltages of the first and second output nodes to respectively generate the first and second voltages, the high-side and low-side selectors respectively selecting the first voltage and the second voltage to respectively generate a high-side voltage and a low-side voltage, a high-side comparator generating a high-side short-circuit signal when the high-side voltage is lower than a high-side reference voltage, and a low-side comparator generating a low-side short-circuit signal when the low-side voltage exceeds the low-side reference voltage.

IPC Classes  ?

• H02H 9/00 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
• H03K 17/082 - Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
• G11B 19/28 - Speed controlling, regulating or indicating
• H02P 1/00 - Arrangements for starting electric motors or dynamo-electric converters
• H02P 6/08 - Arrangements for controlling the speed or torque of a single motor
• H02P 7/03 - Arrangements for regulating or controlling the speed or torque of electric DC motors for controlling the direction of rotation of DC motors
• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
• H02H 7/085 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
• H02H 3/08 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current
• H02P 29/024 - Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load

Abstract

A motor operating system includes a parameter-setting module and a control circuit. The parameter-setting module generates a first parameter-setting corresponding to a first operating stage through a user interface, and determines whether a first operating status conforms to a first threshold setting. The control circuit is coupled to a motor, receives the first parameter-setting corresponding to the first operating status, drives the motor according to a first driving signal corresponding to the first parameter-setting, and outputs the first operating status corresponding to the first driving signal. When the first operating status does not conform the first threshold setting, the parameter-setting module generates an adjusted first parameter-setting. When the first operating status conforms the first threshold setting, the parameter-setting module sets the first parameter-setting as a first optimal parameter-setting.

IPC Classes  ?

• H02P 23/14 - Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
• H02P 23/00 - Arrangements or methods for the control of AC motors characterised by a control method other than vector control

Abstract

A current control circuit for a driving circuitry system of an LED component is provided. In the driving circuitry system, a rectifier provides a rectified voltage to an anode of the LED component, and a current module sets a current flowing through the LED component. In the current control circuit, input and output terminals of a voltage regulator are respectively coupled to the input terminal of the current module and a non-inverting input terminal of an operational amplifier. An inverting input terminal of the operational amplifier is coupled to an output terminal of the current module, and an output terminal thereof is coupled to one terminal of a capacitor. An output-terminal voltage of the first operational amplifier is provided as a reference voltage for the current module. One terminal of a resistor is coupled to the inverting input terminal of the operational amplifier.

IPC Classes  ?

• H05B 33/08 - Circuit arrangements for operating electroluminescent light sources
• H05B 37/00 - Circuit arrangements for electric light sources in general

Abstract

A current control circuit is provided for a driving circuit system of LEDs coupled in series. The driving circuit system includes a rectifier and current modules. In the current control circuit, a first voltage-division circuit divides an output voltage of the rectifier to obtain a first voltage. A first operational amplifier has a non-inverting input terminal receiving a reference voltage, an inverting input terminal coupled to a common output terminal, and an output terminal coupled to one terminal of a capacitor and a first input terminal of a multiplier. A first input terminal of the multiplier receives an output voltage of the first operational amplifier, and the second input terminal thereof receives the first voltage. The other terminal of the capacitor is coupled to the ground. One terminal of a resistor is coupled to the common output terminal, and the other terminal thereof is coupled to the ground.

IPC Classes  ?

• H05B 37/00 - Circuit arrangements for electric light sources in general
• H05B 33/08 - Circuit arrangements for operating electroluminescent light sources

Abstract

A LED driving device is provided. The LED driving device includes a multi-segment linear LED driver, first current-compensating device and second current-compensating device. The LED driving device is used to drive a LED device which is composed by a plurality of serial LED modules. The multi-segment linear LED driver selectively provides a first path to a first LED module of the LED modules for flowing a first constant current, or provides a second path to the first LED module and a second LED module of the LED modules for flowing a second constant current. When the first path is provided, first compensating current flows through the first current-compensating device. When the second path is provided, the first current-compensating device stops conducting the first compensating current. When the second path is provided, second compensating current flows through the second current-compensating device.

IPC Classes  ?

• H05B 37/02 - Controlling
• H05B 33/08 - Circuit arrangements for operating electroluminescent light sources

Abstract

A gain controlling system, a sound playback system, and a gain controlling method thereof are disclosed. The gain controlling system includes a main gain control unit, a sub gain control unit, and a logic control unit. The main gain control unit has a first step-by-step adjusting magnitude; the sub gain control unit has a second step-by-step adjusting magnitude; wherein the second step-by-step adjusting magnitude is smaller than the first step-by-step adjusting magnitude. The logic control unit is used for controlling the main and the sub gain control unit to transform an analog signal into a converted signal according to an adjustment command signal and further determining whether an adjusting magnitude required by the adjustment command signal is larger than a maximum gain range of the sub gain control unit. If yes, the logic control unit controls the main control unit and the sub gain control unit repeatedly.

IPC Classes  ?

• H03G 3/00 - Gain control in amplifiers or frequency changers

Abstract

An electrostatic discharge (ESD) protection circuit with electrical overstress (EOS) and latch-up immunity has a main ESD circuit, a voltage detection circuit and an electrostatic driving circuit. The main ESD circuit is coupled between a first rail and a second rail and has a control end. The main ESD circuit is configured to establish an electrical connection between the first rail and the second rail based on a voltage of the control end. The voltage detection circuit is coupled between the first rail and the second rail for setting the voltage of the control end when a voltage of the first rail is greater than a limiting voltage. The electrostatic driving circuit is used to drive the main ESD circuit when an ESD phenomenon occurs.

IPC Classes  ?

• H02H 3/22 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess voltage of short duration, e.g. lightning
• H02H 9/04 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
• H01L 27/02 - Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
• H01L 27/092 - Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only the components being field-effect transistors with insulated gate complementary MIS field-effect transistors

Abstract

A LED driving apparatus includes: an output transistor, having a drain coupled to the LED; a node, coupled to a source of the output transistor; a ground transistor, having a drain coupled to the node, and a source coupled to the ground; an operational amplifier, including: a first input end and a second input end, for respectively receiving a driving signal and a feedback signal; and an output end, for outputting an output signal to a gate of the output transistor; a compensating capacitor, including a first end and a second end; and a switching unit, for switching between a first connection mode and a second connection mode, so as to offset a bias difference to the node for compensating the bias difference of the operational amplifier.

IPC Classes  ?

• G05F 1/46 - Regulating voltage or current wherein the variable actually regulated by the final control device is DC
• H05B 33/08 - Circuit arrangements for operating electroluminescent light sources

Abstract

A lighting system includes: a rectifier full-wave rectified an AC voltage to generate an output voltage; first and second LED groups connected to each other in series, wherein an input terminal of the first LED group is coupled to the output voltage; first terminals of first and second switches respectively coupled to output terminals of the first and second LED groups; a first resistor having a first terminal connected to the second terminal of the first switch and the second switch and a second terminal connected to a ground voltage; and first and second operational amplifiers having output terminals respectively coupled to control terminals of the first and second switches, and inverting input terminals respectively coupled to the first terminal of the first resistor, and non-inverting input terminals respectively coupled to the first and second reference voltages.

IPC Classes  ?

• H05B 37/02 - Controlling
• H05B 33/08 - Circuit arrangements for operating electroluminescent light sources

Abstract

The present invention discloses an interface transmission method including: enabling a first command string including a first sub-command to be transmitted to a storage device from a processing device during a first period; enabling a second command string including a second sub-command to be transmitted to the storage device from the processing device during a second period, wherein the first sub-command and the second sub-command constitute a command; when the command is a write command, enabling a write data string to be transmitted to the storage device from the processing device during a third period, wherein the write data string includes write data; and when the command is a read command, enabling a read data string to be transmitted to the processing device from the storage device during the third period, wherein the read data string includes read data.

IPC Classes  ?

• G06F 12/00 - Accessing, addressing or allocating within memory systems or architectures
• G06F 13/42 - Bus transfer protocol, e.g. handshakeSynchronisation
• G06F 12/0879 - Burst mode

Abstract

A touch sensing circuit is provided. The touch sensing circuit includes: a touch capacitor, for being touched; a touch capacitor frequency detection unit, coupled to the touch capacitor, for detecting an output frequency from the touch capacitor; a reference frequency generation unit, for generating a reference frequency; a calculation unit, coupled to the touch capacitor frequency detection unit and the reference frequency generation unit, for calculating the variation of the difference between the output frequency from the touch capacitor and the reference frequency; and a determination unit, coupled to the calculation unit, for determining whether the touch capacitor is being touched based on whether the variation of the difference is greater than a criterion value.

IPC Classes  ?

• G01R 23/00 - Arrangements for measuring frequenciesArrangements for analysing frequency spectra
• G01R 27/26 - Measuring inductance or capacitanceMeasuring quality factor, e.g. by using the resonance methodMeasuring loss factorMeasuring dielectric constants
• G06F 3/044 - Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
• G06F 3/02 - Input arrangements using manually operated switches, e.g. using keyboards or dials
• G06F 3/041 - Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• H03K 17/96 - Touch switches

Abstract

A current mirror circuit, receiving an input current and outputting a plurality of mirroring currents, comprising: a first transistor, wherein a control terminal and a first terminal of the first transistor are connected to a first mirroring current of the input current; at least one second transistor, wherein a control terminal and a first terminal of the at least one second transistor are connected to the at least one second mirroring current of the input current; and a plurality of third transistors, outputting the plurality of mirroring currents from first terminals of the plurality of third transistors, wherein control terminals of the plurality of third transistors are connected to control terminals of the first transistor and the at least one second transistor. The first transistor, the at least one second transistor and the plurality of third transistors are identical.

IPC Classes  ?

• G05F 3/16 - Regulating voltage or current wherein the variable is DC using uncontrolled devices with non-linear characteristics being semiconductor devices
• G05F 3/26 - Current mirrors

Abstract

The present invention discloses a touch-sensing method, applied to a touch-sensing circuit, wherein the touch-sensing circuit includes a detection circuit and a comparison circuit. The touch-sensing method includes: enabling a receiving node to be coupled to a ground during a first discharge period, wherein the receiving node is coupled between the detection circuit and the comparison circuit; enabling the receiving node to obtain a first reference voltage during a first charge period; enabling the receiving node to be coupled to the ground during a second discharge period; and enabling the receiving node to obtain a second reference voltage and producing a sensing result according to the first reference voltage and the second reference voltage by the comparison circuit during a second charge period, wherein the sensing result represents whether a touch event occurs at a first node of the touch-sensing circuit.

IPC Classes  ?

• G06F 3/044 - Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
• H03K 17/96 - Touch switches

Abstract

A system for dual chirp modulation includes a transmission unit, a receiving unit, and a transmission channel. A modulation module of the transmission unit is configured to receive binary data and modulate the binary data by a first dual chirp sequence and a second dual chirp sequence for generating an output signal. Then the output signal is converted from digital form to analog form by a digital to analog converter. A transmission channel is configured to receive the output signal converted to analog form, wherein the output signal converted to analog folio passes the transmission channel for generating a received signal. An analog to digital converter converts the received signal from analog form to digital form and a demodulation module demodulates the received signal with digital form, by the first dual chirp sequence and the second dial chirp sequence, for recovering the binary data.

IPC Classes  ?

• H04B 1/00 - Details of transmission systems, not covered by a single one of groups Details of transmission systems not characterised by the medium used for transmission
• H04L 27/10 - Frequency-modulated carrier systems, i.e. using frequency-shift keying

Abstract

A class-D power amplifier capable of reducing electromagnetic interference includes an integrator, a triangular wave generator, a comparator, a gate driver, a feedback circuit, and an output stage circuit. The integrator is used for receiving an input signal and potential of ground, and outputting a first voltage. The comparator is used for comparing the first voltage with a triangular wave generated by the triangular wave generator to output a pulse-width modulation signal. The gate driver is used for driving the output stage circuit to output an output voltage according to the pulse-width modulation signal. Therefore, the class-D power amplifier reduces the electromagnetic interference by the triangular wave.

IPC Classes  ?

• H03F 3/38 - DC amplifiers with modulator at input and demodulator at outputModulators or demodulators specially adapted for use in such amplifiers
• H03F 3/217 - Class D power amplifiersSwitching amplifiers
• H03K 4/06 - Generating pulses having essentially a finite slope or stepped portions having triangular shape

Abstract

An amplifying circuit capable of suppressing spikes of an audio signal includes an integration module, a comparison module, an output module, a feedback module, and a limiting module. The integration module is used for receiving an input signal and generating a first voltage signal corresponding to the input signal. The comparison module is coupled to the integration module for receiving the first voltage signal and a reference signal, and generating a comparison signal. The output module is coupled to the comparison module for generating an audio signal according to the comparison signal. The feedback module is coupled between the output module and the integration module for feeding back an output signal to the integration module. The limiting module is coupled between the feedback module and the integration module for limiting the comparison signal to be within a predetermined range.

IPC Classes  ?

• H03F 1/34 - Negative-feedback-circuit arrangements with or without positive feedback
• H03F 3/217 - Class D power amplifiersSwitching amplifiers
• H03F 3/38 - DC amplifiers with modulator at input and demodulator at outputModulators or demodulators specially adapted for use in such amplifiers
• H03F 1/02 - Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
• H03F 1/52 - Circuit arrangements for protecting such amplifiers
• H03F 3/185 - Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only with field-effect devices
• H03F 1/32 - Modifications of amplifiers to reduce non-linear distortion
• H03K 7/08 - Duration or width modulation

Abstract

A voltage clamping module is disposed at an output terminal of a gain amplifying module, so that a voltage level of an amplifying signal outputted by the gain amplifying module can be clamped within a predetermined range. The voltage clamping module includes an upper bound voltage clamping module, which is utilized for limiting the voltage level of the amplifying signal to be lower than an upper bound voltage level, and a lower bound voltage clamping module, which is utilized for limiting the voltage level of the amplifying signal to be higher than a lower bound voltage level.

IPC Classes  ?

• H03G 3/10 - Manually-operated control in untuned amplifiers having semiconductor devices
• H03F 1/26 - Modifications of amplifiers to reduce influence of noise generated by amplifying elements
• H03G 11/00 - Limiting amplitudeLimiting rate of change of amplitude

Abstract

A voltage detecting device applied to a driving device of a light-emitting diode device is provided. The detecting device includes a voltage inspecting device, an isolating/connecting control device and a comparing device. The voltage inspecting device is coupled to an output terminal of the driving device to inspect a status of an output voltage of the driving device and outputs an inspecting signal. The isolating/connecting control device, coupled between the voltage inspecting device and the driving device, isolates or connects the output terminal of the driving device according to the inspecting signal. The comparing device, composed of low voltage elements, is coupled to the isolating/connecting control device, and compares the output voltage of the driving device with a reference voltage and generates a detecting signal according to the comparing result.

IPC Classes  ?

• H05B 37/02 - Controlling

Abstract

A light emitting diode (LED) driving circuit is provided. The LED driving circuit includes: at least one LED driving module, coupled to the at least one LED series, for driving the corresponding LED series; and a voltage regulating module, coupled to the at least one LED driving module, for providing a regulation signal according to an output signal from the at least one LED driving module, wherein an input voltage of the at least one LED series is regulated according to the regulation signal.

IPC Classes  ?

• H05B 37/00 - Circuit arrangements for electric light sources in general
• H05B 33/08 - Circuit arrangements for operating electroluminescent light sources

Abstract

A current generating circuit for providing a plurality of load current is provided. The current generating circuit includes: a plurality of operational amplifier, coupled to a reference voltage source, wherein each positive input end of the a plurality of operational amplifier receives the reference voltage source; a plurality of semiconductor switch, used for controlling the output of a plurality of load current, wherein each semiconductor switch is respectively coupled to a corresponding operational amplifier and a load, and the semiconductor switch operates according to signals outputted from the output end of the corresponding operational amplifier to output the corresponding load current; and a control unit, coupled to a plurality of operational amplifier, for outputting a control signal to control the operation of a plurality of operational amplifier.

IPC Classes  ?

• H05B 37/02 - Controlling

Abstract

In a controlling circuit, a photo coupler is used for isolating noises, and a general purpose amplifier is used for adjusting a gain, so that a logic tester may test analog signals in cooperation with relays having different specifications and operating voltage level differences in an analog measurement module. A shift register of each controlling circuit of a controlling module also transmits a test data signal to a next stage controlling circuit, so that a logic tester may simultaneously output a plurality of bits to multiple controlling circuits and multiple analog measurement modules by using merely one I/O port.

IPC Classes  ?

• H03L 5/00 - Automatic control of voltage, current, or power
• G01R 15/22 - Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-emitting devices, e.g. LED, optocouplers

Abstract

A one-shot circuit capable of being integrated into a chip generates a frequency-dividing signal according to a reference clock signal of a clock signal generator by means of a frequency-dividing circuit. In this way, the order of the magnitude of the cycle length of the frequency-dividing signal can be raised up by increasing the frequency-dividing times in the frequency-dividing circuit, so that the resistance and the capacitance of an RC oscillator of the clock signal generator are effectively reduced. Therefore, the circuited area occupied by the RC oscillator of the clock signal generator is reduced, so that the one shot circuit can be integrated into a chip without increasing the cost.

IPC Classes  ?

• H03L 7/06 - Automatic control of frequency or phaseSynchronisation using a reference signal applied to a frequency- or phase-locked loop

Abstract

General speaking, a resistor of high resistivity has a negative-temperature-coefficient and a resistor of low resistivity has a positive-temperature-coefficient. Utilizing this characteristic, an appropriate proportion between the above resistors can be found to make a combined resistor with an approximate zero-temperature-coefficient. The combined resistor can be used to design a circuit for generating voltage and current with approximate zero-temperature-coefficients.

IPC Classes  ?

• H01L 35/00 - SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR - Details thereof

Abstract

An electrostatic discharge protection device is disclosed. The electrostatic discharge protection device preferably includes a first transistor, a second transistor, and an electrostatic discharge clamping circuit. The first transistor includes a first drain electrically connected to an input/output pin of a chip, a first source electrically connected to a first voltage input pin of the chip, and a first gate. The first drain is preferably an internally shrunk drain. The second transistor includes a second drain electrically connected to the input/output pin of the chip, a second source electrically connected to a second voltage input pin and a second gate. The electrostatic discharge clamping circuit is electrically connected to the first voltage input pin and the second voltage input pin.

IPC Classes  ?

• H01L 23/62 - Protection against overcurrent or overload, e.g. fuses, shunts
• H01L 21/336 - Field-effect transistors with an insulated gate

Abstract

By classifying an electro-phoretic display integrated circuit (EPD IC) into a digital routine module, a digital non-routine module, and an analog routine module, and by switching off the digital non-routine module and the analog routine module, power consumption of the EPD IC may be effectively reduced, and an available time of an integrated circuit card utilizing the EPD IC may also be lengthened.

IPC Classes  ?

• G06F 1/32 - Means for saving power

Abstract

An oscillation circuit including a first transistor, a second transistor, a current source, a first inverter, and an impedance unit is disclosed. The first transistor has a first source receiving a first operation voltage, a first drain, and a first gate coupled to the first drain. The second transistor has a second source receiving the first operation voltage, a second drain, and a second gate coupled to the first gate. The current source is coupled between the first drain and a grounding voltage. The first inverter generates an oscillation signal and has a first input terminal, a first output terminal, and a first power terminal coupled to the second drain. The impedance unit is coupled between the first input terminal and the first output terminal.

IPC Classes  ?

• H03L 7/00 - Automatic control of frequency or phaseSynchronisation

Abstract

A testing apparatus includes a public test board, a single DUT (device under test) test board and a holder. The public test board includes a plurality of public test channel sets each having a plurality of public signal terminals for receiving test signals. On the single DUT test board, a plurality first signal terminals are arranged according to the pin layout of a DUT, a plurality second signal terminals are arranged according to the terminal layout of a public channel set, and a plurality traces are arranged for electrically connecting corresponding first and second signal terminals. The holder can connect the pins of the DUT to corresponding first signal terminals.

IPC Classes  ?

• G01R 31/00 - Arrangements for testing electric propertiesArrangements for locating electric faultsArrangements for electrical testing characterised by what is being tested not provided for elsewhere

Abstract

An output driving circuit is disclosed, providing an output signal at an output node and comprises an inverter and an output driver. A first P-type transistor and a first N-type transistor of the inverter are coupled in series between high and low voltage sources and controlled respectively by first and second driving signals. A gate oxide layer of the first N-type transistor is thinner than that of the first P-type transistor. The inverter generates a first driving signal. A second P-type transistor and a second N-type transistor of the output driver are coupled in series at the output node between the high and low voltage sources. The second P-type transistor and the second N-type transistor are controlled respectively by the first driving signal and a second driving signal. A falling time of the first driving signal is longer than a falling time of the second driving signal.

IPC Classes  ?

• H03B 1/00 - GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNERGENERATION OF NOISE BY SUCH CIRCUITS Details
• H03K 3/00 - Circuits for generating electric pulsesMonostable, bistable or multistable circuits

Abstract

A power supply device with power conversion capabilities is disclosed. The power supply device comprises an input module, a power converter, and an output module. The input module is used for receiving an alternating current power. The power converter is coupled to the input module for converting the alternating current power to a direct current power. The output module is coupled to the power converter for outputting the direct current power.

IPC Classes  ?

• H02M 1/12 - Arrangements for reducing harmonics from AC input or output

Abstract

A power source circuit for an oscillator is provided comprising a multiplexer, a plurality of transmission gates, a plurality of resistors, a current source circuit, and an output circuit. The multiplexer inputs a digital signal and outputs one or more control signals. The transmission gates is individually coupled to the multiplexer and receives the one or more control signals, wherein each of the plurality of transmission gates are turned on or off according to the one or more control signals. The plurality of resistors is coupled in series and individually coupled to the plurality of transmission gates. The current source circuit is coupled to the plurality of resistors and provides a current source. The output circuit is coupled to the current source and provides output power for the oscillator according to the current source and the operation of the transmission gates.

IPC Classes  ?

• H03B 5/24 - Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator active element in amplifier being semiconductor device
• H03K 3/03 - Astable circuits
• H03L 1/00 - Stabilisation of generator output against variations of physical values, e.g. power supply

Abstract

A frequency stabilizing device of an oscillator is disclosed. The frequency stabilizing device of an oscillator is used for stabilizing the frequency of an oscillator to keep the frequency in constant when input voltage is changed. The frequency stabilizing device comprises a plurality of transmission gates for receiving an input voltage and generating a current and a plurality of resistors for control the value of the current, wherein the current is positive in relation to the input voltage and the frequency of the oscillator is determined by the current.

IPC Classes  ?

• H03L 5/02 - Automatic control of voltage, current, or power of power

Abstract

A stabilizing current source circuit is provided. The stabilizing current source circuit is used for stabilizing a current provided by a current source, and the current of the current source increases when temperature rises. The stabilizing current source circuit comprises a current source circuit and an adjustment circuit. The current source circuit provides a current that increases when temperature rises. The adjustment circuit is coupled to the current source circuit and provides an input current that increases when temperature rises. The current of the current source is subtracted from the input current to generate a current source current which does not vary with temperature.

IPC Classes  ?

• G05F 3/26 - Current mirrors

Abstract

An audio control apparatus. The audio control apparatus comprises a processing module, an amplification module, and a control module. The processing module receives and processes an audio signal according to a control signal, and generates a processed signal. The amplification module coupled to the processing module, amplifies the processed signal to generate an output signal. The control module coupled to the processing module and the amplification module, receives the output signal to generate the control signal.

IPC Classes  ?

• H03G 3/00 - Gain control in amplifiers or frequency changers

Abstract

A clock device is provided for generating a real-time clock. The clock device includes a frequency generator, a measuring module, a setting module and a timing module. The frequency generator generates a frequency signal. The measuring module is coupled to the frequency generator for measuring the frequency signal and generating a measuring frequency value. The setting module is coupled to the measuring module for generating an error setting value corresponding to the measuring frequency value. The timing module is coupled to the frequency generator and the setting module for compensating the frequency signal according to the error setting value and generating the real-time clock.

IPC Classes  ?

• G04B 18/00 - Mechanisms for setting frequency

Abstract

A level shifter including a first boost circuit, an inverter, a second boost circuit and a level shift circuit is disclosed. The first boost circuit receives an input signal, and a first amplification factor for the input signal is determined based on a control signal. The inverter receives the input signal to generate an inverted input signal. The second boost circuit is coupled to an output terminal of the inverter to receive the inverted input signal, and a second amplification factor for the inverted input signal is determined based on the control signal. The level shift circuit has a first input terminal and a second input terminal respectively coupled to output terminals of the first boost circuit and second boost circuit to change the voltage level of output signals from the first boost circuit and second boost circuit to a first voltage level.

IPC Classes  ?

• H03L 5/00 - Automatic control of voltage, current, or power

Abstract

The invention provides display control circuits for Vacuum Fluorescent Displays (VFDs). The display control circuit controls a plurality of display units of the VFD and comprises an image signal generator generating a plurality of image signals, a clock signal generator generating a clock signal, and a plurality of control signal generators. Each control signal generator receives one of the image signals and the clock signal, generates a control signal for one of the display unit, and determines the duty cycle of the control signal according to the received image signal and the clock signal. The brightness of one display unit varies with the duty cycles of the corresponding control signal. The clock signal generator comprises a plurality of flip-flops coupled in series and a plurality of logic gates.

IPC Classes  ?

• G09G 3/22 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix using controlled light sources

Abstract

A method for arranging electronic elements is provided. The method is suitable for a set of N electronic elements in which N is an odd number. The set of N electronic elements include a first electronic element subset and a second electronic element subset. The electronic elements of the first electronic element subset are arranged according a first predetermined method and the electronic elements of the second electronic element subset are arranged according to a second predetermined method, wherein the second electronic element subset is adjacent to the first electronic element subset.

IPC Classes  ?

• H03B 1/00 - GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNERGENERATION OF NOISE BY SUCH CIRCUITS Details

Abstract

A control circuit for controlling a motor. The control circuit includes a control module, a current transformation module and a comparison module. The control module generates a control current and a comparison voltage according to a first current, a first voltage and an input voltage. The current transformation module, coupled to the control module, generates a first output voltage from a first output terminal and a second output voltage from a second output terminal. The comparison module, coupled to the control module and the current transformation module, compares a threshold voltage, the first output voltage, the second output voltage, and the comparison voltage and generates a plurality of control signals to control the motor.

IPC Classes  ?

• H03K 4/02 - Generating pulses having essentially a finite slope or stepped portions having stepped portions, e.g. staircase waveform

Abstract

After coupling a first voltage source to a voltage supply circuit, a second voltage source having a same electrical level but an opposite electrical pole with said first voltage source is generated. An audio amplifier is then driven by both the first voltage source and the second voltage source, where said audio amplifier requires a pair of voltage sources having the same electrical level but opposite electrical poles to be driven. The voltage supply circuit generates the second voltage source from the first voltage source by simultaneously switching two sets of switches, where said both sets of switches have non-synchronous statuses in switching.

IPC Classes  ?

• H03F 3/04 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only

Abstract

A transmitter IC provided with a SAW-based oscillator with an external SAW device. The transmitter IC comprises an oscillating circuit. The oscillating circuit comprises an inverter stage, a first capacitor, a second capacitor, and a resistor. The inverter stage has input and output terminals respectively coupled to two ends of the external SAW device. The first and second capacitors are respectively coupled between the input/output terminal and a ground. The resistor is coupled between the input and output terminals of the inverter stage.

IPC Classes  ?

• H04B 7/00 - Radio transmission systems, i.e. using radiation field
• H04B 1/16 - Circuits

Abstract

A receiver IC provided with a SAW-based oscillator with an external SAW device. The receiver IC comprises an oscillating circuit. The oscillating circuit comprises an inverter stage, a first capacitor, a second capacitor, and a resistor. The inverter stage has input and output terminals respectively coupled to two ends of the external SAW device. The first and second capacitors are respectively coupled between the input/output terminal and a ground. The resistor is coupled between the input and output terminals of the inverter stage.

IPC Classes  ?

• H04B 7/00 - Radio transmission systems, i.e. using radiation field
• H04B 1/16 - Circuits

Abstract

An audio amplifier includes a plurality of sub-audio amplifier sets, a clock source, and a speaker. When the audio amplifier is under an audio amplify mode, the plurality of sub-audio amplifier sets is operated under a synchronic operating frequency with a same clock signal generated by the clock source. When the audio amplifier is under a self-oscillation mode, the clock signal is isolated from being input to the plurality of sub-audio amplifier sets. A higher distortion is prevented by repeatedly charging and discharging an oscillating capacitor of a sub-audio amplifier in a sub-audio amplifier set.

IPC Classes  ?

• H04R 5/00 - Stereophonic arrangements

Abstract

The invention discloses a Gamma transform unit. The Gamma transform unit has a lookup table. The lookup table stores a plurality of difference values corresponding to a plurality of predetermined input values. Each of the difference values substantially equals a difference between an ideal output value and a Gamma function output value, both of which correspond to one of the predetermined input values. After the Gamma transform unit has received an input value, it generates a required Gamma function output value corresponding to the received input value through referring to the lookup table.

IPC Classes  ?

• H04N 5/202 - Gamma control
• H04N 9/69 - Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits for modifying the colour signals by gamma correction

Abstract

When electric current is provided to a scan line of a display panel, electric current flowing from an initial end to a final end of the scan line is gradually reduced because of resistance consumption, resulting in lower brightness on both left and right sides of the display panel. Therefore, data line driving signals provided to the display panel are compensated for solving such a problem.

IPC Classes  ?

• G09G 3/32 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]

Abstract

A single-ended input to differential-ended output amplifier circuit comprises an amplifier for amplifying an input signal into an amplified signal comprises an input for receiving the input signal; and a first input and a single-ended input to differential-ended output conversion circuit to convert the amplified signal to a differential signal pair, comprising a first transistor for receiving the amplified signal having a first gate coupled to the first output, a first first terminal coupled to a second output, and a first second terminal coupled to a first node; a second transistor having a second gate, a second first terminal coupled to a third input, and a second second terminal coupled to the first node; a second capacitor coupled between the second output and the second gate; a first and a second resistors and the voltage source; and a current source coupled between the first node and a ground.

IPC Classes  ?

• H03F 3/04 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only

Abstract

A system for controlling illumination of a fluorescent lamp includes a silicon controlled rectifier (SCR) control circuit receiving a first signal of a power source and generating an adjustment signal. A charge pump circuit receives a charge pump signal, a second signal of the power source and the adjustment signal to generate a direct current (DC) power signal. An RC attenuator attenuates the adjustment signal to generate an attenuated DC signal. A control circuit receives the attenuated DC signal and generates first and second output signals according to a first reference voltage, a second reference voltage and a power feedback signal of the fluorescent lamp. A half bridge driving circuit receives the first output signal, the second output signal and the DC power signal to generate an illuminating signal and the charge pump signal. The illumination of the fluorescent lamp is adjustable by the illuminating signal.

IPC Classes  ?

• H05B 37/00 - Circuit arrangements for electric light sources in general

Abstract

A charging circuit for a bridge tied load (BTL) including an amplifier and a load driven by the amplifier according to a voice signal and a reference voltage stored in a reference capacitor. The charging circuit comprises a power supply and a comparison unit. The power supply provides one of a first voltage and a second voltage to the reference capacitor according to a control signal. The reference voltage is generated by the reference capacitor according to the first voltage and the second voltage. The comparison unit deactivates the control signal and provides the first voltage to the reference capacitor when the reference voltage is less than a first predetermined value. The comparison unit activates the control signal and provides the second voltage to the reference capacitor when the reference voltage is less than a second predetermined value and exceeds or equals the first predetermined value.

IPC Classes  ?

• G05F 1/00 - Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems

Goods & Services

Chips, namely, computer chips and silicon chips; electronic chips for the manufacturer of integrated circuits; semi-conductors; micro-circuits, namely micronetworks for use in the design integrated circuits; integrated circuits; electronic integrated circuits; electronic circuit cards and electronic circuit boards; semi-conductor chips; integrated semiconductor components in the nature of semiconductor chips; micro-processor chips; very large scale integrated circuits