| Patents for H03F 1 - Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements (30,272) |
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| 05/02/2013 | WO2013060376A1 Receiver circuit, phased-array receiver and radar system |
| 05/02/2013 | WO2012033801A3 Radio frequency communications system |
| 05/02/2013 | US20130106514 High voltage driver amplifier for piezo haptics |
| 05/02/2013 | US20130106510 Audio-output amplifier circuit for audio device, audio device, electronic device including audio device, and output control method for audio device |
| 05/02/2013 | US20130106509 Power Amplifier Linearization Using Cancellation-Based Feed Forward Methods and Systems |
| 05/02/2013 | US20130106507 Systems and methods for performing multi-modal power amplification |
| 05/02/2013 | DE19841677B4 Integrierte, aktive Intergrator-Filterschaltung Built-in active integrator filter circuit |
| 05/01/2013 | EP2587666A2 High-frequency amplifier |
| 05/01/2013 | EP2587665A1 Amplifier apparatus |
| 05/01/2013 | EP2413499B1 Switched capacitor circuit |
| 05/01/2013 | CN202918247U Digital short-circuit protection device of audio power amplifier |
| 05/01/2013 | CN202918246U Preposed charge amplifier with low noise |
| 05/01/2013 | CN202918245U Low noise amplifier |
| 05/01/2013 | CN103078596A Fully-differential low-power-consumption low-noise amplifier |
| 05/01/2013 | CN103078595A Low phase noise frequency scale switching, distributing and amplifying equipment |
| 05/01/2013 | CN103078594A Radio-frequency front-end circuit for multiplexing current |
| 05/01/2013 | CN102158178B Complementary metal oxide semiconductor (CMOS) physiological signal amplifier adopting T-type capacitance network feedback structure |
| 05/01/2013 | CN102142818B Class-AB amplifier and over-temperature protection circuit thereof |
| 05/01/2013 | CN101931372B D type amplifier with second-order noise filtering circuit |
| 05/01/2013 | CN101651448B Method and system for protecting data information of power amplifier |
| 04/30/2013 | US8433545 Compensation of electromagnetic interfering fields |
| 04/30/2013 | US8433543 Digital oscilloscope module with glitch detection |
| 04/30/2013 | US8433078 High perceived audio quality class D amplifier |
| 04/30/2013 | US8432226 Amplifier circuits and methods for cancelling Miller capacitance |
| 04/30/2013 | US8432220 Linearization device for a power amplifier |
| 04/30/2013 | US8432217 Amplifier |
| 04/30/2013 | DE202013001075U1 Audio-Codierer und Decodierer mit Lautheits-Verarbeitugszustands-Metadaten Audio encoder and decoder with loudness Verarbeitugszustands metadata |
| 04/25/2013 | WO2013058048A1 High frequency amplifier |
| 04/25/2013 | WO2013056660A1 Predistortion circuit, wireless communication unit and method for coefficient estimation |
| 04/25/2013 | WO2013056632A1 System and method for a multi-band power-amplifier |
| 04/25/2013 | WO2013022241A3 Radio frequency amplifier in communication system and method of controlling the same |
| 04/25/2013 | US20130099865 Low-stress cascode structure |
| 04/25/2013 | US20130099862 Linearization of broadband power amplifiers |
| 04/25/2013 | US20130099858 Dual primary switched transformer for impedance and power scaling |
| 04/25/2013 | US20130099797 Variable Impedance Device |
| 04/24/2013 | EP2584698A1 High-frequency amplifier circuit |
| 04/24/2013 | CN202907071U Mute circuit realizing starting up by using MOS (metal oxide semiconductor) transistors and television provided with mute circuit |
| 04/24/2013 | CN202906845U Anti-cracking voice circuit for D-class power amplifier chip |
| 04/24/2013 | CN202906840U Circuit capable of avoiding radio frequency power amplifier collector electrode or drain electrode power control saturation failure |
| 04/24/2013 | CN202906839U High frequency bandwidth amplifier circuit |
| 04/24/2013 | CN202906838U High frequency bandwidth amplifier circuit |
| 04/24/2013 | CN103067032A Low noise decimetric wave signal frequency conversion amplification receiving system |
| 04/24/2013 | CN103066930A Circuit for reducing chopping amplifier output ripple, measuring device and signal measuring method |
| 04/24/2013 | CN103066929A High-speed transimpedance amplifier |
| 04/24/2013 | CN103066928A Nonlinear power amplifier |
| 04/24/2013 | CN103066927A Method of and device for digital pre-rectifying distortion of amplifier |
| 04/24/2013 | CN103066926A Automatic digital zeroing circuit for integral circuit |
| 04/24/2013 | CN103066925A Low noise power amplification method and device and satellite navigation receiving device |
| 04/24/2013 | CN103066924A Ultra-wide band and low noise amplifier |
| 04/24/2013 | CN103066923A Fourth order double balanced power amplificatory circuit |
| 04/24/2013 | CN102176657B Positive-feedback-broadband LNA (low noise amplifier) for millimeter wave frequency range |
| 04/24/2013 | CN102158180B Switch-type operation amplifier with low power consumption |
| 04/24/2013 | CN102122925B Constant transconductance operational amplifier and method for operation |
| 04/24/2013 | CN102064777B Amplification circuit |
| 04/24/2013 | CN101939908B Multi-mode high efficiency linear power amplifier |
| 04/24/2013 | CN101807889B Class d amplifier |
| 04/24/2013 | CN101320980B Transmitter and signal transmission method |
| 04/23/2013 | US8427234 Method and apparatus for predistorting a signal |
| 04/23/2013 | US8427233 Method and apparatus to linearize transconductors by predistortion |
| 04/23/2013 | CA2595241C Non-linear processing of signals |
| 04/18/2013 | WO2013056257A1 Adaptive transmitter pre-distortion reusing existing receiver for feedback |
| 04/18/2013 | WO2013055171A1 Apparatus and method for modulating supply for a power amplifier |
| 04/18/2013 | WO2013055170A1 Apparatus and method for improving efficiency in power amplifier |
| 04/18/2013 | WO2013055090A1 Apparatus and method for calibration of supply modulation in transmitter |
| 04/18/2013 | WO2013054601A1 Front-end amplifier |
| 04/18/2013 | WO2013054553A1 Distortion compensation circuit and transmission device using distortion compensation circuit and high-frequency power amplifier |
| 04/18/2013 | WO2013053713A1 Envelope tracking power amplifier with low impedance supply feed |
| 04/18/2013 | WO2013053661A1 A low-noise amplifier circuit |
| 04/18/2013 | WO2013053557A1 Control system for a power amplifier |
| 04/18/2013 | US20130093520 Power amplifier with low noise figure and voltage variable gain |
| 04/18/2013 | US20130093510 High-frequency signal amplifier |
| 04/18/2013 | DE102012216840A1 HF-Bauelement mit Ausgleichsresonatoranpassungstopologie RF device with Ausgleichsresonatoranpassungstopologie |
| 04/18/2013 | CA2851555A1 Control system for a power amplifier |
| 04/17/2013 | EP2582043A1 Control system for a power amplifier |
| 04/17/2013 | EP2582042A1 A low-noise amplifier circuit |
| 04/17/2013 | EP2582041A2 Apparatus and Method for Interleaving Switching in Power Amplifier |
| 04/17/2013 | EP2582040A2 Apparatus and method for expanding operation region of power amplifier |
| 04/17/2013 | EP2582039A2 System and method for generating a radio frequency pulse-width modulated signal |
| 04/17/2013 | EP2582038A1 Methods and apparatus for power control |
| 04/17/2013 | EP2582037A1 Device and method for reproducing an audio signal |
| 04/17/2013 | EP2582004A1 Power converter system for mobile devices |
| 04/17/2013 | EP2580861A1 Integrated circuit including a differential power amplifier with a single ended output and an integrated balun |
| 04/17/2013 | CN202889291U Power amplifier protective circuit |
| 04/17/2013 | CN202889290U Vehicle-mounted high fidelity micro digitized audio power amplifier |
| 04/17/2013 | CN202889289U Layout structure for reducing direct current offset voltage of cascading amplifying circuit |
| 04/17/2013 | CN202888384U LTCC (Low-Temperature Co-Fired Ceramic) pipe shell of integrated coupler |
| 04/17/2013 | CN103051298A Programmable gain amplification circuit and programmable gain amplifier |
| 04/17/2013 | CN103051296A Multi-stage digitally-controlled power amplifier, emitter and related method thereof |
| 04/17/2013 | CN103051293A Pre-distortion processing method and system for radio frequency amplifier |
| 04/17/2013 | CN103051292A Radio frequency transmitter, gain compensation circuit and method |
| 04/17/2013 | CN103051291A Stage-matching-adjustable CMOS (complementary metal oxide semiconductor) ultra-wideband low-noise amplifier circuit |
| 04/17/2013 | CN103051290A Peak value holding driving method |
| 04/17/2013 | CN103051289A Preliminary amplifier with low clock crosstalk, dynamic comparator and circuit |
| 04/17/2013 | CN101895971B Method, apparatus and system for adjusting power amplifier voltage and controlling time slot |
| 04/17/2013 | CN101795113B Amplifier circuit with first and second output lines |
| 04/16/2013 | US8421802 Peak visualization enhancement display system for use with a compressed waveform display on a non-destructive inspection instrument |
| 04/16/2013 | US8421534 Predistorter for compensating for nonlinear distortion and method thereof |
| 04/16/2013 | US8421533 Adaptive digital predistortion device and method |
| 04/16/2013 | US8421531 Low dissipation amplifier |
| 04/11/2013 | WO2013051861A1 Digital predistortion apparatus and method using the sum of absolute input signals for a non-identical number of delays |