Abrégé

A self-oscillating amplifier system comprising at least two integrator stages connected to receive an input signal and provide a reference signal, a comparator configured to provide a modulation signal based on the reference 5 signal and a modulation feedback signal, and a switching stage connected to form a switching output signal. The system further comprises a voltage limiting circuit connected between the input signal and the reference signal, for limiting a voltage across the at least two integrator stages. By connecting one single voltage limiting circuit across all integrator stages, the modulation signal will be limited to the voltage limit of this voltage limiting circuit.

Classes IPC  ?

• H03F 3/183 - Amplificateurs à basse fréquence, p. ex. préamplificateurs à fréquence musicale comportant uniquement des dispositifs à semi-conducteurs

Abrégé

A self-oscillating amplifier system comprising at least two integrator stages connected to receive an input signal and provide a reference signal, acomparator configured to provide a modulation signal based on the reference 5signal and a modulation feedback signal, and a switching stage connected to form a switching output signal. The system further comprises a voltage limiting circuit connected between the input signal and the reference signal, for limiting a voltage across the at least two integrator stages.By connecting one single voltage limiting circuit across all integrator stages, the modulation signal will be limited to the voltage limit of this voltage limiting circuit.

Classes IPC  ?

• H03F 3/183 - Amplificateurs à basse fréquence, p. ex. préamplificateurs à fréquence musicale comportant uniquement des dispositifs à semi-conducteurs
• H03F 3/217 - Amplificateurs de puissance de classe DAmplificateurs à commutation

Produits et services

Electric and electronic apparatus and equipment, not included in other classes, for analogue, digital or optical reception, processing, reproduction, control, amplification or distribution of light, audio or image signals, audiovisual equipment relating thereto, not included in other classes; amplifier, power amplifiers; TV apparatus, TV apparatus with in-built VCR player, DVD player, amplifier, radio receiver or unit for accessing global computer networks; audio equipment, not included in other classes, containing an amplifier; amplifiers, loudspeakers, loudspeakers with build in amplifiers; speaker enclosures; electronic control units for regulation of sound signals; radio receivers; compact disc players and recorders, mini-discs, recorders and tapes and digital media; radios for vehicles; amplifiers for vehicles, power amplifiers for vehicles, audio equipment for vehicles; headphones; remote control apparatus; cable installations; control units and related installations; software for the remote control of light-, sound- or picture signals; electric and electronic apparatus and equipment, not included in other classes, for data processing and data input, output and storage; computers; computers, magnetic and optical data carriers, computer programmes recorded on tapes, cards, discs or other media, disc storage, word processors and word processing equipment; software for electric and electronic apparatus and equipment; parts and fittings (not included in other classes) for all the aforesaid goods; microelectronic components; optical electronic components; audio devices and radio receivers; components for use in audio apparatus and radio receivers; integrated circuit chips; electronic chips for the manufacturer of integrated circuits; electronic chips; chipsets for audio apparatus. Professional consultancy (non-business) relating to technological know-how in relation to the production and development of electric and electronic apparatus and equipment for analogue, digital or optical reception, processing, reproduction, control, amplification or distribution of light, audio or image signals, including in particular in relation to the production and development of audio amplifiers, power supplies and components therefor; technological consultation services; research relating to technology; consultancy in the field of technological design; technological analysis services; development and design of software and hardware for audio and video equipment; technical data analysis services; providing of technical information relating to audio apparatus. Licensing of intellectual property and know-how; professional consultancy (non-business) relating to industrial property rights.

Produits et services

Electric and electronic apparatus and equipment for analogue, digital or optical reception, processing, reproduction, control, amplification or distribution of light, audio or image signals, and audiovisual equipment relating thereto, namely, radios, radio receivers, players and recorders for CDs, compact disc players, DVD players, video cassette players, tape recorders, loud speaker systems, power transformers for amplification, loudspeakers, headphones, and earphones; amplifiers, power amplifiers; TV apparatus in the nature of TV sets, TV apparatus in the nature of television sets with in-built VCR players, DVD players, amplifier, radio receiver and computer hardware for accessing global computer networks; audio equipment being amplifiers, power supplies for audio equipment, audio speakers, headphones, headsets, personal stereos, audio mixers, electronic effects pedals for use with sound amplifiers, subwoofers, audio processors being signal processors for audio speakers, audio switchers being electronic switchers for audio and video signals, audio projectors and audio receivers, and also containing an amplifier; loudspeakers, loudspeakers with build in amplifiers; speaker enclosures; electronic controllers for use with amplifiers, power amplifiers, loud speakers, headphones, and earphones for the regulation of sound signals; radio receivers; compact disc players and recorders; mini-disc, tape, and digital media recorders; radios for vehicles; amplifiers for vehicles, power amplifiers for vehicles, audio equipment for vehicles, namely, electrical power supplies; headphones; remote control apparatus, namely, remote controls for amplifiers, loudspeakers, headphones, and earphones; cable installations, namely, electrical cable installations in the nature of electric cables for use in connections for audio equipment; control units and related installations, namely, electronic control units for regulation of sound signals; downloadable and recorded software for the remote control of light-, sound- or picture signals; electric and electronic apparatus and equipment for data processing and data input, output and storage, namely, central processing units for processing data and sound, central processing units (CPU), field programmable gate arrays being integrated circuits, digital signal processors (DSP), computer hardware in the nature of application specific integrated circuit (ASIC), and microcontrollers; computers; blank magnetic and optical data carriers; computer programmes recorded on tapes, cards, discs, and other digital media for use in amplifiers and transformers for amplification; disc storage containers, word processors and word processing equipment; downloadable and recorded software for electric and electronic apparatus and equipment, namely, software to control and improve audio and video equipment sound quality; replacement parts and fittings for all the aforesaid goods; microelectronic components, namely, transistors, optical couplers, data processing equipment in the nature of couplers, integrated circuit modules, electronic integrated circuits, amplifiers, voltage regulators, semi-conductors, and encoded integrated circuits containing programming used for digital control, monitoring, regulating, signal reproduction, and signal enhancement in electronic circuits; optical electronic components, namely, transistors, optical couplers, data processing equipment in the nature of couplers, integrated circuit modules, electronic integrated circuits, amplifiers, voltage regulators, semi-conductors, and encoded integrated circuits containing programming used for digital control, monitoring, regulating, signal reproduction, and signal enhancement in electronic circuits; audio devices, namely, telecommunications and data networking hardware for transporting and aggregating voice, data and video communications across multiple network infrastructures and communications protocols; components for use in audio apparatus and radio receivers, namely, transistors, optical couplers, data processing equipment in the nature of couplers, integrated circuit modules, electronic integrated circuits, amplifiers, voltage regulators, semi-conductors, and encoded integrated circuits containing programming used for digital control, monitoring, regulating, signal reproduction, and signal enhancement in electronic circuits; integrated circuit chips; electronic chips for the manufacturer of integrated circuits; electronic chips for the manufacture of integrated circuits; chipsets for audio apparatus Professional technological consultancy relating to technological know-how in relation to the production and development of electric and electronic apparatus and equipment for analogue, digital or optical reception, processing, reproduction, control, amplification or distribution of light, audio or image signals, in technology field of the production and development of audio amplifiers, power supplies and components therefor; technological consultation services in the technology field of sound transmission and amplification; research relating to technology, namely, technological research in the fields of the production and development of audio amplifiers, power supplies and components therefor; consultancy in the field of technological design of audio amplifiers, power supplies and components therefor; scientific and technological services, namely, technological analysis services in the field of the production and development of audio amplifiers, power supplies and components therefor; development and design of software and hardware for audio and video equipment; scientific and technological services, namely technical data analysis services in the field of sound transmission and amplification; providing of technical information in the field of designing and engineering audio apparatus Licensing of intellectual property; professional consultancy relating to industrial property rights

Produits et services

(1) Electric and electronic audio equipment, namely, printed circuit boards with mounted components for audio circuits, circuit boards for audio equipment, embedded operating software for use in audio equipment and application programming interface (API) software for audio equipment to facilitate audio processing and control of graphic user interfaces, recorded and downloadable application programming interface software to control, adjust, change and delay sound for use in audio equipment, power supplies for audio equipment and high-frequency switching power supplies for audio equipment and audiovisual equipment relating thereto, namely, radios, radio receivers, players and recorders for CDs, and MP3 files, compact disc players, DVD players, video cassette players, tape recorders, loud speaker systems, power transformers for amplification, loudspeakers, headphones, and earphones; amplifiers, namely, audio amplifiers, sound amplifiers, musical instrument amplifiers; power amplifiers; TV apparatus in the nature of TV sets, TV apparatus in the nature of television sets with in-built VCR players, DVD players, audio amplifiers, sound amplifiers, musical instrument amplifiers, radio receiver and computer hardware for accessing global computer networks; audio equipment containing audio amplifiers, sound amplifiers and musical instrument amplifiers; loudspeakers, loudspeakers with build in amplifiers; speaker enclosures; electronic controllers for use with audio amplifiers, sound amplifiers, musical instrument amplifiers, power amplifiers, loud speakers, headphones, and earphones for the regulation of sound signals; radio receivers; compact disc players and recorders; blank mini-compact disc, blank audio tape, and digital media recorders namely compact disc recorders; radios for vehicles; amplifiers, namely, audio amplifiers, sound amplifiers, music amplifiers for vehicles, power amplifiers for vehicle audio equipment for vehicles, namely, electrical power supplies for audio amplifiers; headphones; remote control apparatus, namely, remote controls for audio amplifiers, sound amplifiers, musical instrument amplifiers, loudspeakers, headphones, and earphones; cable installations, namely, electrical cables; control units and related installations, namely, electronic controls for regulation of sound signals; downloadable and recorded software for the remote control of light-, sound- and digital and analog signals, namely, software implemented on integrated chip (IC), central processing units (CPU), field programmable gate arrays (FPGA), digital signal processors (DSP), application specific integrated circuit (ASIC), and microcontrollers (MCU) system on a chip (SoC) for monitors, flat screens, liquid crystal display screens, touch screens, QLED screens, plasma screens, televisions, computers, laptops, tablets, smart phones and flat panel display screens, liquid crystal display screens, televisions, computers, laptops, tablets and smart phones; electric and electronic apparatus and equipment for data processing and data input, output and storage, namely, central processing units for processing data and sound, central processing units (CPU), integrated chip (IC), microcontrollers (MCU), system on a chip (SoC), field programmable gate arrays (FPGA), digital signal processors (DSP), application specific integrated circuit (ASIC), optocouplers and microcontrollers; computers; blank magnetic and optical data carriers, namely, blank audio tapes, blank audio discs; computer programmes recorded on tapes, cards, discs, other digital media for use in audio amplifiers, sound amplifiers, musical instrument amplifiers and transformers for amplification; disc storage containers, word processors and word processing equipment; downloadable and recorded software for electric and electronic apparatus and equipment, namely, software to control and improve audio and video equipment sound quality; replacement parts and fittings for circuit boards, audio amplifiers, sound amplifiers, musical instrument amplifiers, power amplifiers, TV sets, television sets with built in VCR players, DVD players, radio receivers and computer hardware, loud speakers, loud speakers with built in amplifiers, speaker enclosures, electronic controllers for use with audio amplifiers, sound amplifiers, musical instrument amplifiers, power amplifiers, loud speakers, headphones, and ear phones for the regulation of sound signals, radio receivers, compact disc players and recorders, audio amplifiers, electronic controls for regulation of sound signals, central processing units, optocouplers and microcontrollers, computers; microelectronic components, namely, transistors, optical couplers, data processing equipment in the nature of couplers, integrated circuit modules, electronic integrated circuits, optical, signal, sound, stereo and mono, analog and digital audio amplifiers, voltage regulators, semi-conductors, and encoded integrated circuits containing programming used for digital control, monitoring, regulating, signal reproduction, and signal enhancement in electronic circuits; optical electronic components, namely, transistors, optical couplers, data processing equipment in the nature of couplers, integrated circuit modules, electronic integrated circuits, audio amplifiers, sound amplifiers, musical instrument amplifiers, voltage regulators, semi-conductors, and encoded integrated circuits containing programming used for digital control, monitoring, regulating, signal reproduction, and signal enhancement in electronic circuits; audio devices, namely, data networking audio amplifier, data networking power supply, data networking electronic circuit, LAN audio amplifier, LAN power supply, LAN electrical circuit, network audio processing amplifier, network audio processing power supply, network audio processing electronic circuit, power over ethernet audio amplifier, power over ethernet power supply, power over ethernet audio electronic circuits, audio over IP amplifier, audio over IP power supply, audio over IP electronic circuits, audio over network amplifier, audio over network power supply, audio over network electronic circuit, wireless audio processing amplifier, wireless audio processing power supply, wireless audio electronic circuits, remote controlled audio over network amplifier, remote controlled audio over network power supply, remote controlled audio over network electronic circuits for transporting and aggregating voice, data and video communications across multiple network infrastructures and communications protocols; components for use in audio apparatus and radio receivers, namely, transistors, optical couplers, data processing equipment in the nature of couplers, integrated circuit modules, electronic integrated circuits, audio amplifiers, sound amplifiers, and musical instrument amplifiers, voltage regulators, semi-conductors, and encoded integrated circuits containing programming used for digital control, monitoring, regulating, signal reproduction, and signal enhancement in electronic circuits; electronic chips for the manufacturer of integrated circuits; chipsets for audio products, namely, audio amplifiers, sound amplifiers, musical instrument amplifiers, power amplifiers, TV sets, television sets with built in VCR players, DVD players, radio receivers and computers, loud speakers, loud speakers with built in amplifiers, speaker enclosures, electronic controllers for use with audio amplifiers, sound amplifiers, musical instrument amplifiers, power amplifiers, loud speakers, headphones, and ear phones for the regulation of sound signals, radio receivers, compact disc players and recorders, audio amplifiers, electronic controls for regulation of sound signals, equipment, namely, central processing units, optocouplers and microcontrollers, computers printed circuit boards, and electrical circuits used for audio, sound, music and signals. (1) Professional technological consultancy relating to technological know-how in relation to the production and development of electric and electronic apparatus and equipment for analogue, digital and optical reception, processing, reproduction, control, amplification and distribution of light, audio and image signals, in the technology field of the production and development of audio amplifiers, power supplies and components therefor; technological consultation services in the field of sound transmission and amplification; research relating to technology, namely, technological research in the fields of the production and development of audio amplifiers, power supplies and components therefor; consultancy in the field of technological design of audio amplifiers, power supplies and components therefor; scientific and technological services, namely, technological analysis services in the field of the production and development of audio amplifiers, power supplies and components therefor; development and design of software and hardware for audio and video equipment; technical data analysis services, namely, sound transmission and amplification data analysis; providing of technical information in the field of designing and electrical engineering of audio apparatus namely, audio power supplies, audio electronic circuits, speakers, loudspeakers, automatic voltage regulators, stereos, subwoofers, amplifiers, tuners, receivers, network processor boards, effect pedals, projectors, televisions, computers, laptops, tablets, headphones, headsets, audio processors, digital signal processors, digital mix processors, digital mixers, analog mixers, audio mixers, audio switchers, audio converters and extractors, audio transformers and isolators. (2) Licensing of intellectual property; professional consultancy relating to industrial property rights.

Produits et services

Electric and electronic apparatus and equipment, not included in other classes, for analogue, digital or optical reception, processing, reproduction, control, amplification or distribution of light, audio or image signals, audiovisual equipment relating thereto, not included in other classes; Amplifier, power amplifiers; TV apparatus, TV apparatus with in-built VCR player, DVD player, amplifier, radio receiver or unit for accessing global computer networks; Audio equipment, not included in other classes, containing an amplifier; Amplifiers, loudspeakers, loudspeakers with build in amplifiers; Speaker enclosures; Electronic control units for regulation of sound signals; Radio receivers; Compact disc players and recorders, mini-discs, recorders and tapes and digital media; Radios for vehicles; Amplifiers for vehicles, power amplifiers for vehicles, audio equipment for vehicles; Headphones; Remote control apparatus; Cable installations; Control units and related installations; software for the remote control of light-, sound- or picture signals; Electric and electronic apparatus and equipment, not included in other classes, for data processing and data input, output and storage; Computers; Computers, magnetic and optical data carriers, computer programmes recorded on tapes, cards, discs or other media, disc storage, word processors and word processing equipment; Software for electric and electronic apparatus and equipment; Parts and fittings (not included in other classes) for all the aforesaid goods; Microelectronic components; Optical electronic components; Audio devices and radio receivers; Components for use in audio apparatus and radio receivers; Integrated circuit chips; Electronic chips for the manufacturer of integrated circuits; Electronic chips; Chipsets for audio apparatus. Professional consultancy (non-business) relating to technological know-how in relation to the production and development of electric and electronic apparatus and equipment for analogue, digital or optical reception, processing, reproduction, control, amplification or distribution of light, audio or image signals, including in particular in relation to the production and development of audio amplifiers, power supplies and components therefor; Technological consultation services; Research relating to technology; Consultancy in the field of technological design; Technological analysis services; Development and design of software and hardware for audio and video equipment; Technical data analysis services; Providing of technical information relating to audio apparatus. Licensing of intellectual property and know-how; Professional consultancy (non-business) relating to industrial property rights.

Abrégé

A new and improved self-oscillating amplifier system is presented, suitable for use in high fidelity audio applications. The self-oscillating amplifier system comprises a feedback path and a forward path including a pulse modulator, a switching power amplification stage and a demodulation filter. The forward path further includes a pair of parallel forward filters preceding the pulse modulators, a differentiating forward filter and an integrating forward filter. The differentiating forward filter is utilized for controlling a switching frequency of the system while the integrating forward filter is utilized for controlling the behavior of the amplifier system within an operating frequency band (e.g. audio band). The self-oscillating amplifier system exhibits improved performance in terms of open loop gain, reduced phase turn and improved robustness as compared to other previously known self-oscillating amplifier systems.

Classes IPC  ?

• H03F 3/38 - Amplificateurs de courant continu, comportant un modulateur à l'entrée et un démodulateur à la sortieModulateurs ou démodulateurs spécialement conçus pour être utilisés dans de tels amplificateurs
• H03F 3/217 - Amplificateurs de puissance de classe DAmplificateurs à commutation
• H03F 3/183 - Amplificateurs à basse fréquence, p. ex. préamplificateurs à fréquence musicale comportant uniquement des dispositifs à semi-conducteurs
• H03F 1/02 - Modifications des amplificateurs pour augmenter leur rendement, p. ex. étages classe A à pente glissante, utilisation d'une oscillation auxiliaire
• H03F 1/08 - Modifications des amplificateurs pour réduire l'influence défavorable de l'impédance interne des éléments amplificateurs

Abrégé

The invention relates to a compensator device for compensating signal dependent delay variations, including dead time and reverse recovery time, causing un-linearity in a Class-D amplifier where the compensator device comprises: a first input terminal for receiving an input pulse width modulated input PWM signal comprising pulses with falling flanks corresponding to a falling level transition and rising flanks corresponding to a rising level transition; and a second input terminal configured to receive the signal provided at an output switching node of a Class-D amplifier; an output terminal for providing a compensated output signal; and controllable delay means configured to receive and delay the pulse modulated input signal, thereby providing a delayed version of the input signal to said output terminal of the compensator device. The compensator device further comprises time measuring means configured for measuring the time between a transition of the signal provided at the output terminal of the compensator device and the corresponding transition of the signal at the output switching node of a Class-D amplifier and based on these measurements providing a control signal to the controllable delay means. An advantageous effect of the present invention is that the rising and falling level transition delays will be substantially similar thus substantially removing non-linearity and obtaining substantially correct pulse widths. The invention further relates to a corresponding method, a driver device and a Class-D amplifier.

Classes IPC  ?

• H03F 3/217 - Amplificateurs de puissance de classe DAmplificateurs à commutation
• H03K 5/151 - Dispositions dans lesquelles des impulsions sont délivrées à plusieurs sorties à des instants différents, c.-à-d. distributeurs d'impulsions avec deux sorties complémentaires
• H03K 17/16 - Modifications pour éliminer les tensions ou courants parasites

Abrégé

A power conversion system comprising an amplifier input for receiving an analog input signal and an amplifier output for providing a switching output signal is disclosed. The system is applicable for use in high definition switching audio amplification. The power conversion system further comprises a clipper for clipping the analog input signal having a predefined range limited by a clipping level, a pulse modulator and a switching power stage. The system further has a feedback path to the clipper including a duty cycle measuring unit and a clip level filter which generates a clip level signal and where the clipping level of the clipper is controlled by the clip level signal. Hereby it is e.g. possible to clip an analog input signal with good precision and reliability in a switching power conversion system.

Classes IPC  ?

• H03F 3/38 - Amplificateurs de courant continu, comportant un modulateur à l'entrée et un démodulateur à la sortieModulateurs ou démodulateurs spécialement conçus pour être utilisés dans de tels amplificateurs
• H03F 3/217 - Amplificateurs de puissance de classe DAmplificateurs à commutation
• H03F 3/181 - Amplificateurs à basse fréquence, p. ex. préamplificateurs à fréquence musicale
• H03F 1/52 - Circuits pour la protection de ces amplificateurs

Abrégé

A switching power conversion system and a method for start-up pop minimization in an audio amplifier assembly are disclosed. The switching power conversion system comprises a forward path including a compensator, a switching power stage and a demodulation filter. The system further comprises a DC-servo and a pre-charging circuit and a sequence control unit configured for providing a start-up sequence where the compensator and DC-servo are correctly biased and a bootstrap capacitor within the switching power stage is charged before the switching power stage is started. Hereby, it is e.g. possible to minimize the audible start-up pop in audio amplifier assemblies.

Classes IPC  ?

• H03F 1/30 - Modifications des amplificateurs pour réduire l'influence des variations de la température ou de la tension d'alimentation
• H03F 3/183 - Amplificateurs à basse fréquence, p. ex. préamplificateurs à fréquence musicale comportant uniquement des dispositifs à semi-conducteurs
• H03F 3/217 - Amplificateurs de puissance de classe DAmplificateurs à commutation

Abrégé

A self-oscillating amplifier system is disclosed. The system comprises a pulse modulator, a switching power amplification stage and a demodulation filter. Moreover, the system comprises a compensator including a forward filter which is a high order filter including a second order pole pair and a second order zero pair. Hereby it is possible to decrease the phase turn at low frequencies for better stability and increasing the gain of the control loop within the desired bandwidth.

Classes IPC  ?

• H03F 1/26 - Modifications des amplificateurs pour réduire l'influence du bruit provoqué par les éléments amplificateurs
• H03F 3/217 - Amplificateurs de puissance de classe DAmplificateurs à commutation
• H03F 3/183 - Amplificateurs à basse fréquence, p. ex. préamplificateurs à fréquence musicale comportant uniquement des dispositifs à semi-conducteurs

Abrégé

A close-down pop reduction system and a method for close-down pop reduction in an audio amplifier assembly are disclosed. The switching power conversion system comprises a forward path having a compensator and a switching power stage and a signal path from an output of a comparator in the switching power stage to a sequence control unit. The signal path includes a close-down timing circuit configured to provide a timing signal. The sequence control unit is configured to eliminate the input signal, increase the switch frequency of the close-down pop reduction system and disable the switching power stage at a moment in time within a PWM pulse of the switching power stage. Hereby, it is e.g. possible to minimize the audible pop during close-down of audio amplifier assemblies.

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 1/30 - Modifications des amplificateurs pour réduire l'influence des variations de la température ou de la tension d'alimentation
• H03F 3/183 - Amplificateurs à basse fréquence, p. ex. préamplificateurs à fréquence musicale comportant uniquement des dispositifs à semi-conducteurs
• H03G 3/30 - Commande automatique dans des amplificateurs comportant des dispositifs semi-conducteurs
• H03F 3/217 - Amplificateurs de puissance de classe DAmplificateurs à commutation
• H03F 1/02 - Modifications des amplificateurs pour augmenter leur rendement, p. ex. étages classe A à pente glissante, utilisation d'une oscillation auxiliaire

Produits et services

Electric and electronic apparatus and equipment, not included in other classes, for analogue, digital or optical reception, processing, reproduction, control, amplification or distribution of light, audio or image signals, audiovisual equipment relating thereto, not included in other classes; amplifiers, power amplifiers; tv apparatus, tv apparatus with built-in vcr players, dvd players, amplifiers, radio receivers or units for accessing global computer networks; audio equipment, not included in other classes, containing amplifiers; amplifiers, loudspeakers, loudspeakers with built in amplifiers; loudspeaker cabinets; electronic control units for regulation of sound signals; radio receivers; cd players and recorders, mini-discs, recorders and tapes and digital media; radios for vehicles; amplifiers for vehicles, power amplifiers for vehicles, audio equipment for vehicles; headphones; remote control units; cable installations; control units and related installations; software for the remote control of light-, sound- or picture signals; electric and electronic apparatus and equipment, not included in other classes, for data processing and data input, output and storage; computers; magnetic and optical data carriers, computer programmes recorded on tapes, cards, discs or other media, disc storage; software for electric and electronic apparatus and equipment; parts and fittings (not included in other classes) for all the aforesaid goods; microelectronic components; optical electronic components; audio devices and radio receivers; components for use in audio apparatus and radio receivers; integrated circuit chips; electronic chips for the manufacturer of integrated circuits; electronic chips; chipsets for audio apparatus.

Produits et services

Electric and electronic apparatus and equipment, not included in other classes, for analogue, digital or optical reception, processing, reproduction, control, amplification or distribution of light, audio or image signals, audiovisual equipment relating thereto, not included in other classes; amplifiers, power amplifiers; tv apparatus, tv apparatus with built-in vcr players, dvd players, amplifiers, radio receivers or units for accessing global computer networks; audio equipment, not included in other classes, containing amplifiers; amplifiers, loudspeakers, loudspeakers with built in amplifiers; loudspeaker cabinets; electronic control units for regulation of sound signals; radio receivers; cd players and recorders, mini-discs, recorders and tapes and digital media; radios for vehicles; amplifiers for vehicles, power amplifiers for vehicles, audio equipment for vehicles; headphones; remote control units; cable installations; control units and related installations; software for the remote control of light-, sound- or picture signals; electric and electronic apparatus and equipment, not included in other classes, for data processing and data input, output and storage; computers; magnetic and optical data carriers, computer programmes recorded on tapes, cards, discs or other media, disc storage; software for electric and electronic apparatus and equipment; parts and fittings (not included in other classes) for all the aforesaid goods; microelectronic components; optical electronic components; audio devices and radio receivers; components for use in audio apparatus and radio receivers; integrated circuit chips; electronic chips for the manufacturer of integrated circuits; electronic chips; chipsets for audio apparatus.

Produits et services

Electric and electronic apparatus and equipment, not included in other classes, for analogue, digital or optical control and amplification of audio signals, namely, audio switching apparatus and self-oscillating audio amplifiers; amplifiers, power amplifiers; televisions, televisions with built-in VCR-players, DVD players, radio receivers or units for accessing global computer networks, namely, computers, tablets and mobile phones; loudspeakers, loudspeakers with built in amplifiers; loudspeaker cabinets; electronic control units for regulation of sound signals; CD players and recorders; radios for vehicles; amplifiers for vehicles, power amplifiers for vehicles; headphones; remote control units for audio amplifiers; control units for audio amplifiers; software for the remote control of light, sound or picture signals; [ computer programmes recorded on tapes, cards, discs or other media for use in amplifiers and transformers for audio enhancement; ] disc storage containers; [ software for electric and electronic apparatus and equipment, namely, software to control and improve audio and video equipment sound quality; ] microelectronic components, namely, central processing units, gate array integrated circuits, digital signal processors, application specific integrated circuits, and microcontrollers; integrated circuit chips; electronic chips for the manufacturer of integrated circuits; chipsets for audio apparatus

Produits et services

[ Electric and electronic apparatus and equipment, not included in other classes, for analogue, digital or optical control and amplification of audio signals, namely, audio switching apparatus and self-oscillating audio amplifiers; amplifiers, power amplifiers; televisions, televisions with built-in VCR-players, DVD players, radio receivers or units for accessing global computer networks, namely, computers, tablets and mobile phones; loudspeakers, loudspeakers with built in amplifiers; loudspeaker cabinets; electronic control units for regulation of sound signals; CD players and recorders; radios for vehicles; amplifiers for vehicles, power amplifiers for vehicles; headphones; remote control units for audio amplifiers; control units for audio amplifiers; ] software for the remote control of light, sound or picture signals; computer programmes recorded on tapes, cards, discs or other media for use in amplifiers and transformers for audio enhancement; [ disc storage containers; ] software for electric and electronic apparatus and equipment, namely, software to control and improve audio and video equipment sound quality [ ; microelectronic components, namely, central processing units, gate array integrated circuits, digital signal processors, application specific integrated circuits, and microcontrollers; integrated circuit chips; electronic chips for the manufacturer of integrated circuits; chipsets for audio apparatus ]

Produits et services

Electric and electronic apparatus and equipment, not included in other classes, for analogue, digital or optical reception, processing, reproduction, control, amplification or distribution of light, audio or image signals, audiovisual equipment relating thereto, not included in other classes; Amplifiers, power amplifiers; TV apparatus, TV apparatus with built-in VCR players, DVD players, amplifiers, radio receivers or units for accessing global computer networks; Audio equipment, not included in other classes, containing amplifiers; Amplifiers, loudspeakers, loudspeakers with builtin amplifiers; Loudspeaker cabinets; Electronic control units for regulation of sound signals; Radio receivers; CD players and recorders, mini-discs, recorders and tapes and digital media; Radios for vehicles; Amplifiers for vehicles, power amplifiers for vehicles, audio equipment for vehicles; Headphones; Remote control units; Cable installations; Control units and related installations; software for the remote control of light-, sound- or picture signals; Electric and electronic apparatus and equipment, not included in other classes, for data processing and data input, output and storage; Computers; magnetic and optical data carriers, computer programmes recorded on tapes, cards, discs or other media, disc storage; Software for electric and electronic apparatus and equipment; Parts and fittings (not included in other classes) for all the aforesaid goods; Microelectronic components; Optical electronic components; Audio devices and radio receivers; Components for use in audio apparatus and radio receivers; Integrated circuit chips; Electronic chips for the manufacturer of integrated circuits; Electronic chips; Chipsets for audio apparatus.

Produits et services

Electric and electronic apparatus and equipment, not included in other classes, for analogue, digital or optical reception, processing, reproduction, control, amplification or distribution of light, audio or image signals, audiovisual equipment relating thereto, not included in other classes; amplifiers, power amplifiers; TV apparatus, TV apparatus with in-built VCR players, DVD players, amplifiers, radio receivers or units for accessing global computer networks; audio equipment, not included in other classes, containing amplifiers; amplifiers, loudspeakers, loudspeakers with build in amplifiers; loudspeaker cabinets; electronic control units for regulation of sound signals; radio receivers; CD players and recorders, mini-discs, records and tapes and digital media; radios for vehicles; amplifiers for vehicles, power amplifiers for vehicles, audio equipment for vehicles; headphones; remote control units; cable installations; control units and related installations; software for the remote control of light-, sound- or picture signals; electric and electronic apparatus and equipment, not included in other classes, for data processing and data input, output and storage; computers; magnetic and optical data carriers, computer programmes recorded on tapes, cards, discs or other media, disc storage, software for electric and electronic apparatus and equipment; parts and fittings (not included in other classes) for all the aforesaid goods; microelectronic components; optical electronic components; audio devices and radio receivers; components for use in audio apparatus and radio receivers; integrated circuit chips; electronic chips for the manufacture of integrated circuits; electronic chips; chipsets for audio apparatus. Professional consultancy (non-business) relating to technological know-how in relation to the production and development of electric and electronic apparatus and equipment for analogue, digital or optical reception, processing, reproduction, control, amplification or distribution of light, audio or image signals, including in particular in relation to the production and development of audio amplifiers, power supplies and components therefor; technological consultation services; research relating to technology; consultancy in the field of technological design; technological analysis services; development and design of software and hardware for audio and video equipment; technical data analysis services; providing of technical information relating to audio apparatus. Licensing of intellectual property and know-how; professional consultancy (non-business) relating to industrial property rights.

Abrégé

The invention relates to a compensator device for compensating signal dependent delay variations, including dead time and reverse recovery time, causing un-linearity in a Class-D amplifier where the compensator device comprises: a first input terminal for receiving an input pulse width modulated input PWM signal comprising pulses with falling flanks corresponding to a falling level transition and rising flanks corresponding to a rising level transition; and a second input terminal configured to receive the signal provided at an output switching node of a Class-D amplifier; an output terminal for providing a compensated output signal; and controllable delay means configured to receive and delay the pulse modulated input signal, thereby providing a delayed version of the input signal to said output terminal of the compensator device. The compensator device further comprises time measuring means configured for measuring the time between a transition of the signal provided at the output terminal of the compensator device and the corresponding transition of the signal at the output switching node of a Class- D amplifier and based on these measurements providing a control signal to the controllable delay means. An advantageous effect of the present invention is that the rising and falling level transition delays will be substantially similar thus substantially removing non-linearity and obtaining substantially correct pulse widths. The invention further relates to a corresponding method, a driver device and a Class-D amplifier.

Classes IPC  ?

• H03F 3/217 - Amplificateurs de puissance de classe DAmplificateurs à commutation
• H03K 5/151 - Dispositions dans lesquelles des impulsions sont délivrées à plusieurs sorties à des instants différents, c.-à-d. distributeurs d'impulsions avec deux sorties complémentaires
• H03K 17/16 - Modifications pour éliminer les tensions ou courants parasites

Abrégé

The invention relates to a precise fast temperature measuring system for a switching power conversion systems in general and more specifically Class D power amplifiers, where the power conversion system comprises a switching device, and a temperature sensor (18, 34, 59) providing a temperature signal and means (20; 54, 55, 56, 57, 58) for differentiating the temperature signal from the temperature sensor, such that the temperature of the switching element can be determined as a sum of the sensor temperature signal and a constant times the time derivative of the sensor temperature signal. The invention further relates to a gate driver in which the fast temperature measuring system is applied and to a method for precise and fast temperature measurements in switching power conversion systems and devices.

Classes IPC  ?

• H03F 1/52 - Circuits pour la protection de ces amplificateurs
• H03F 3/217 - Amplificateurs de puissance de classe DAmplificateurs à commutation
• G01R 31/36 - Dispositions pour le test, la mesure ou la surveillance de l’état électrique d’accumulateurs ou de batteries, p. ex. de la capacité ou de l’état de charge
• G01K 7/42 - Circuits pour la compensation de l’inertie thermiqueCircuits pour prévoir la valeur stationnaire de la température

Abrégé

A power conversion system comprising an amplifier input for receiving an analogue input signal and an amplifier output for providing a switching output signal is disclosed. The system is applicable for use in high definition switching audio amplification. The power conversion system further comprises a clipper for clipping the analogue input signal having a predefined range limited by a clipping level, a pulse modulator and a switching power stage. The system further has a feedback path to the clipper including a duty cycle measuring unit and a clip level filter which generates a clip level signal and where the clipping level of the clipper is controlled by the clip level signal. Hereby it is e.g. possible to clip an analogue input signal with good precision and reliability in a switching power conversion system.

Classes IPC  ?

• H03F 3/181 - Amplificateurs à basse fréquence, p. ex. préamplificateurs à fréquence musicale
• H03F 3/217 - Amplificateurs de puissance de classe DAmplificateurs à commutation

Abrégé

A self-oscillating amplifier system is disclosed. The system comprises a pulse modulator, a switching power amplification stage and a demodulation filter. Moreover, the system comprises a compensator including a forward filter which is a high order filter including a second order pole pair and a second order zero pair. Hereby it is possible to decrease the phase turn at low frequencies for better stability and increasing the gain of the control loop within the desired bandwidth.

Classes IPC  ?

• H03F 3/217 - Amplificateurs de puissance de classe DAmplificateurs à commutation

Abrégé

A close-down pop reduction system and a method for close-down pop reduction in an audio amplifier assembly are disclosed. The switching power conversion system comprises a forward path having a compensator and a switching power stage and a signal path from an output of a comparator in the switching power stage to a sequence control unit. The signal path includes a close-down timing circuit configured to provide a timing signal. The sequence control unit is configured to eliminate the input signal, increase the switch frequency of the close-down pop reduction system and disable the switching power stage at a moment in time within a PWM pulse of the switching power stage. Hereby, it is e.g. possible to minimize the audible pop during close- down of audio amplifier assemblies.

Classes IPC  ?

• H03F 3/187 - Amplificateurs à basse fréquence, p. ex. préamplificateurs à fréquence musicale comportant uniquement des dispositifs à semi-conducteurs dans des circuits intégrés
• H03F 3/217 - Amplificateurs de puissance de classe DAmplificateurs à commutation
• H03F 1/30 - Modifications des amplificateurs pour réduire l'influence des variations de la température ou de la tension d'alimentation
• H03F 3/45 - Amplificateurs différentiels
• H03G 3/34 - Commande automatique dans des amplificateurs comportant des dispositifs semi-conducteurs rendant l'amplificateur muet en l'absence de signal

Abrégé

A switching power conversion system and a method for start-up pop minimization in an audio amplifier assembly are disclosed. The switching power conversion system comprises a forward path including a compensator, a switching power stage and a demodulation filter. The system further comprises a DC-servo and a pre-charging circuit and a sequence control unit configured for providing a start-up sequence where the compensator and DC-servo are correctly biased and a bootstrap capacitor within the switching power stage is charged before the switching power stage is started. Hereby, it is e.g. possible to minimize the audible start-up pop in audio amplifier assemblies.

Classes IPC  ?

• H03F 1/30 - Modifications des amplificateurs pour réduire l'influence des variations de la température ou de la tension d'alimentation
• H03F 3/217 - Amplificateurs de puissance de classe DAmplificateurs à commutation
• H03F 1/34 - Circuits à contre-réaction avec ou sans réaction

Produits et services

Electric and electronic apparatus and equipment, not included in other classes, for analogue, digital or optical reception, processing, reproduction, control, amplification or distribution of light, audio or image signals, audiovisual equipment relating thereto, not included in other classes; Amplifiers, power amplifiers; TV apparatus, TV apparatus with built-in VCR players, DVD players, amplifiers, radio receivers or units for accessing global computer networks; Audio equipment, not included in other classes, containing amplifiers; Amplifiers, loudspeakers, loudspeakers with builtin amplifiers; Loudspeaker cabinets; Electronic control units for regulation of sound signals; Radio receivers; CD players and recorders, mini-discs, recorders and tapes and digital media; Radios for vehicles; Amplifiers for vehicles, power amplifiers for vehicles, audio equipment for vehicles; Headphones; Remote control units; Cable installations; Control units and related installations; software for the remote control of light-, sound- or picture signals; Electric and electronic apparatus and equipment, not included in other classes, for data processing and data input, output and storage; Computers; magnetic and optical data carriers, disc storage; Parts and fittings (not included in other classes) for all the aforesaid goods; Microelectronic components; Optical electronic components; Audio devices and radio receivers; Components for use in audio apparatus and radio receivers; Integrated circuit chips; Electronic chips for the manufacturer of integrated circuits; Electronic chips; Chipsets for audio apparatus.

Produits et services

Electric and electronic apparatus and equipment, not included in other classes, for analogue, digital or optical reception, processing, reproduction, control, amplification or distribution of light, audio or image signals, audiovisual equipment relating thereto, not included in other classes; Amplifiers, power amplifiers; TV apparatus, TV apparatus with in-built VCR players, DVD players, amplifiers, radio receivers or units for accessing global computer networks; Audio equipment, not included in other classes, containing amplifiers; Amplifiers, loudspeakers, loudspeakers with build in amplifiers; Loudspeaker cabinets; Electronic control units for regulation of sound signals; Radio receivers; CD players and recorders, mini-discs, recorders and tapes and digital media; Radios for vehicles; Amplifiers for vehicles, power amplifiers for vehicles, audio equipment for vehicles; Headphones; Remote control units; Cable installations; Control units and related installations; software for the remote control of light-, sound- or picture signals; Electric and electronic apparatus and equipment, not included in other classes, for data processing and data input, output and storage; Computers; magnetic and optical data carriers, computer programmes recorded on tapes, cards, discs or other media, disc storage, Software for electric and electronic apparatus and equipment; Parts and fittings (not included in other classes) for all the aforesaid goods; Microelectronic components; Optical electronic components; Audio devices and radio receivers; Components for use in audio apparatus and radio receivers; Integrated circuit chips; Electronic chips for the manufacturer of integrated circuits; Electronic chips; Chipsets for audio apparatus. Professional consultancy (non-business) relating to technological know-how in relation to the production and development of electric and electronic apparatus and equipment for analogue, digital or optical reception, processing, reproduction, control, amplification or distribution of light, audio or image signals, including in particular in relation to the production and development of audio amplifiers, power supplies and components therefor; Technological consultation services; Research relating to technology; Consultancy in the field of technological design; Technological analysis services; Development and design of software and hardware for audio and video equipment; Technical data analysis services; Providing of technical information relating to audio apparatus. Licensing of intellectual property and know-how; Professional consultancy (non-business) relating to industrial property rights.

Produits et services

Electric and electronic apparatus and appliances for analogue, digital or optical reception, processing, reproduction, regulation, amplification or distribution of light, sound or picture signals, audiovisual equipment attached hereto; amplifiers, power transformers for amplification; television sets; television sets with built-in VCR players, DVD-players, amplifiers, radio receivers, or units for acquiring access to global computer networks; audio equipment comprising amplifiers; loudspeakers, loudspeakers with built in amplifiers, loudspeaker cabinets, electronic control units for regulation of sound signals, radio receivers, players and recorders for CDs, mini-discs, records and tapes and digital media; radios for vehicles, amplifiers for vehicles; power transformers for amplification for vehicles, audio equipment for vehicles; headphones; remote control units; cable installations, control units and appurtenant installations; software for remote regulation of light, sound or picture signals; telephones, telephones with built-in answering machines, answering machines, telephones with built-in cameras and monitors and telephone apparatus for data transmission via the Internet or other networks; telecommunication equipment; carriers of stored signals, electric and electronic apparatus and appliances for data processing and for input, output and storage of data; computers, magnetic and optical data carriers, computer programmes recorded on tapes, cards, discs or other media; disc storage units, word processors and word processing equipment, software for electric and electronic apparatus and appliances; parts, spare parts and fittings to all the aforementioned goods included in this class. Musical instruments, musical instruments with built-in amplifiers. Licensing services within the field of industrial property and technological know-how, professional consultancy services within the field of industrial property, professional consultancy services within the field of know-how.

Produits et services

[ Electric and electronic apparatus and appliances for analogue, digital or optical reception, namely, audio and video recording, reproduction and transmission equipment, namely, radios, radio receivers, players and recorders for CDs, mini-discs and MP3 files, compact disc players, DVD players, video cassette players, tape recorders, bud speaker systems, ] power transformers for amplification loudspeakers, headphones, earphones and remote controls thereof; [ television sets; radio receiving sets; radios for automobiles; ] amplifiers, [ loudspeakers, loudspeakers with built-in amplifiers; cabinets for loudspeakers; electronic control units for regulation of sound signals; tape, record or disc recorders or players, telephones, telephones with built-in answering machines, telephone answering machines; telephones with built-in cameras and monitors, telephones for transmission of data through the Internet and other networks; telecommunication equipment, namely, telecommunication cables, telecommunication exchangers, telecommunication switches, telecommunications and data networking hardware, namely, devices for transporting and aggregating voice, data and video communications across multiple network infrastructures and communications protocols, telecommunications transmitters; electrical cable installations; electric and electronic apparatus and appliances for data processing and for input, output and storage of data, namely, central processing units for processing information, data, sound or images; blank magnetic and optical data carriers, computer programs recorded on tapes, cards, discs or other media for use in amplifiers and transformers for amplification; disc storage containers, ] software for electric and electronic apparatus and appliances, namely, software to control and improve audio and video equipment sound quality [, downloadable applications services provider software for the uploading and downloading of digital files such as music files from a database to personal computer, MP3 players and mobile telephones, and software for use in linking audio and video equipment and parts therefor ] [ Musical instruments; musical instruments with built in amplifiers ] Licensing services within the field of industrial property and technological know-how; professional consultancy services within the field of industrial property; professional consultancy services within the field of industrial property and technological know-how

Produits et services

Electric and electronic apparatus and appliances for analogue, digital or optical reception, processing, reproduction, regulation, amplifying or distribution of light, sound or picture signals, audio-visual equipment attached thereto; amplifiers, power transformers for amplification; television sets, television sets with built in VCR players, DVD-players, amplifiers, tuners and/or Internet connections; audio equipment comprising one or several of the following: amplifiers, loudspeakers, radio receivers, players and recorders for CDs, mini-discs, records and tapes and digital media; loudspeakers, loudspeakers with built in amplifiers, headphones; remote control units; cable installations, control units and appurtenant installations as well as software for remote regulation of light, sound or picture signals, telephones, telephones with built in answering machines, answering machines, telephones with built-in cameras and monitors and telephone apparatus for data transmission via the Internet or other networks; telecommunication equipment; carriers of stored signals, electric and electronic apparatus and appliances for data processing and for input, output and storage of data; computers, magnetic and optical data carriers, computer programmes recorded on tapes, cards, discs or other media, disc storage, word processors and word processing equipment; software for electric and electronic apparatus and appliances; parts, spare parts and fittings for all the aforementioned goods included in this class. Musical instruments; musical instruments with built in amplifiers. Licensing services within the field of industrial property and technological know-how; professional consultancy services within the field of industrial property; professional consultancy services within the field of technological know-how.

Produits et services

(1) Amplifiers, power transformers for amplification; television sets, television sets with built in VCR players, DVD-players, amplifiers, tuners and/or internet connection; audio equipment comprising one or several of the following: amplifiers, loudspeakers, radio receivers, players and recorders for CDs, mini-discs, records and tapes and digital media; loudspeakers, loudspeakers with built in amplifiers, headphones; remote control units; software for remote regulation of light, sound or picture signals, telephones, telephones with built in answering machines; answering machines, telephones with built-in cameras and monitors and telephone apparatus for data transmission via the internet or other networks; computers, disc storage, word processors and word processing equipment; parts, spareparts and fittings to all the aforementioned goods. (2) Electrical musical instruments with built in amplifiers, namely keyboards and guitars. (1) Licensing services within the field of industrial property and technological know-how; professional consultancy services within the field industrial property.

Produits et services

Electric and electronic apparatus and appliances for analogue, digital or optical reception, processing, reproduction, regulation, amplifying or distribution of light, sound or picture signals, audiovisual equipment attached hereto; amplifiers, power transformers for amplification; television sets; television sets with built in VCR players, DVD-players, amplifiers, radio receivers, or units for aquiring access to global computer networks; audio equipment comprising amplifiers; loud speakers; loudspeakers with built in amplifiers; loudspeaker cabinets, electronic control units for regulation of sound signals, radio receivers; players and recorders for CDs, mini-discs, records and tapes and digital media; radios for vehicles; headphones; remote control units; cable installations, control units and appurtenant installations; software for remote regulation of light, sound or picture signals; telephones, telephones with built-in answering machines, answering machines, telephones with built-in cameras and monitors and telephone apparatus for data transmission via the Internet or other networks; telecommunication equipment; carriers of stored signals, electric and electronic apparatus and appliances for data processing and for input, output and storage of data; computers, magnetic and optical data carriers, computer programmes recorded on tapes, cards, discs or other media; disc storage units; word processors and word processing equipment; software for electric and electronic apparatus and appliances; parts, spareparts and fittings to all the aforementioned goods included in this class. Musical instruments; musical instruments with built in amplifiers. Licensing services within the field of industrial property and know-how; professional consultancy services within the field of industrial property; professional consultancy services within the field of technological know-how.

Produits et services

(1) Amplifiers, power transformers for amplification; television sets, television sets with built in VCR players, DVD-players; amplifiers, tuners and/or modems; audio equipment comprising one or several of the following: amplifiers, loud speakers, radio receivers, players and recorders for CDs, mini-discs, records and tapes and digital media; loudspeakers, loudspeakers with built in amplifiers, headphones; remote control units; software for remote regulation of light, sound or picture signals, telephones, telephones with built in answering machines, answering machines, telephones with built-in cameras and monitors and telephone apparatus for data transmission via the internet or other networks; computers, disc storage, word processors and word processing equipment; parts, spareparts and fittings to all the aforementioned goods. (2) Electrical musical instruments with built in amplifiers, namely keyboards and guitars. (1) Licensing services within the field of industrial property and technological know-how; professional consultancy services within the field of industrial property.

Produits et services

Electric and electronic apparatus and appliances for analogue, digital or optical reception, processing, reproduction, regulation, amplifying or distribution of light, sound or picture signals, audio-visual equipment attached hereto; amplifiers, power transformers for amplification; television sets, television sets with built in VCR players, DVD-players, amplifiers, tuners and/or Internet connection; audio equipment comprising one or several of the following: amplifiers, loudspeakers, radio receivers, players and recorders for CDs, mini-discs, records and tapes and digital media; loudspeakers, loudspeakers with built in amplifiers, headphones; remote control units; cable installations, control units and appurtenant installations as well as software for remote regulation of light, sound or picture signals, telephones, telephones with built in answering machines, answering machines, telephones with built-in cameras and monitors and telephone apparatus for data transmission via the Internet or other networks; telecommunication equipment; carriers of stored signals, electric and electronic apparatus and appliances for data processing and for input, output and storage of data; computers, magnetic and optical data carriers, computer programmes recorded on tapes, cards, discs or other media, disc storage, word processors and word processing equipment; software for electric and electronic apparatus and appliances; parts, spare parts and fittings for all the aforementioned goods included in this class. Musical instruments; musical instruments with built in amplifiers. Licensing services within the field of industrial property and technological know-how; professional consultancy services within the field of industrial property; professional consultancy services within the field of know-how.

Produits et services

amplifiers and power transformers for amplification

Produits et services

Scientific and electrical apparatus and instruments as well as apparatus and instruments for signalling, checking (supervision) and teaching, apparatus for recording, transmission and reproduction of sound or images, calculating machines; data processing equipement and computers. Musical instruments. Telecommunications.