| 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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| 09/03/2009 | CA2712383A1 Electronic device for microwave apparatuses onboard a satellite |
| 09/02/2009 | EP2095502A1 Transconductance amplifier with improved linearity |
| 09/02/2009 | EP2095501A1 Transconductance amplifier with a filter for rejecting noise outside the useful band |
| 09/02/2009 | EP1776754B1 Method and system for linearizing the characteristic curve of a power amplifier |
| 09/02/2009 | CN201303314Y Efficiency adjusting device of AB type LDMOS linear power amplifier |
| 09/02/2009 | CN101521507A Multiband voltage controlled oscillator |
| 09/02/2009 | CN101521489A Amplifier and class AB amplifier |
| 09/02/2009 | CN101521488A Voice drive circuit for reducing sonic boom when switching on and shutting down |
| 09/02/2009 | CN101521487A Pre-posing circuit in audio power amplifier |
| 09/02/2009 | CN101521486A Bias circuit of power amplifier |
| 09/02/2009 | CN101520666A Wideband digital predistortion power amplifier temperature compensation method and system |
| 09/02/2009 | CN100536325C Transimpedance amplifier with negative impedance compensation function |
| 09/02/2009 | CN100536324C High output amplifier |
| 09/02/2009 | CN100536323C Power amplifier module |
| 09/02/2009 | CN100536322C Method for increasing linearity of feedforward power amplifier using carrier leakage effect |
| 09/02/2009 | CN100536321C TDD RF high power LDMOS amplifier gate voltage control circuit |
| 09/02/2009 | CN100536320C Self-adaptive grid-voltage compensator and its compensation |
| 09/02/2009 | CN100536319C Drive circuit able to gradually increase and reduce voltage |
| 09/02/2009 | CN100536318C Low noise amplifier with low noise and high gain |
| 09/02/2009 | CN100536317C Television switch module |
| 09/01/2009 | USRE40900 Amplifier circuit |
| 09/01/2009 | US7584009 Multi-chip PWM synchronization and communication |
| 09/01/2009 | US7583754 Method and system for broadband predistortion linearization |
| 09/01/2009 | US7583166 Inductor Q factor enhancement apparatus has bias circuit that is coupled to negative resistance generator for providing bias signal |
| 09/01/2009 | US7583148 Transconductance control circuit, method of controlling transconductance, and a power amplifier |
| 09/01/2009 | US7583139 Power-efficient automatic gain control |
| 09/01/2009 | US7583137 Power supply compensation |
| 08/27/2009 | WO2009105696A1 Feedback technique and filter and method |
| 08/27/2009 | WO2009081106A4 Linearised power amplifier |
| 08/27/2009 | WO2009058702A3 Automatic power source configuration |
| 08/27/2009 | US20090212870 Cascode-cascade power amplifier assembly |
| 08/27/2009 | US20090212860 Integrated circuit device and electronic instrument |
| 08/27/2009 | US20090212858 Integrated Doherty type amplifier arrangement with high power efficiency |
| 08/27/2009 | US20090212856 Analog amplifier having dc offset cancellation circuit and method of offset cancellation for analog amplifiers |
| 08/27/2009 | DE102009008753A1 Automatisches Vorspannen eines Verstärkers Automatic pre-amplifier of a |
| 08/26/2009 | EP2093879A1 Feedforward amplifier and control method thereof |
| 08/26/2009 | EP2092709A1 Pulse width modulator |
| 08/26/2009 | EP2092639A1 True current limiting (tcl) |
| 08/26/2009 | EP2092637A1 Temperature compensation of collector-voltage control rf amplifiers |
| 08/26/2009 | EP1889373A4 By-pass arrangement of a low noise amplifier |
| 08/26/2009 | EP1470636B1 N-way rf power amplifier with increased backoff power and power added efficiency |
| 08/26/2009 | EP1290785B1 Devices and methods for calibrating amplifier stages and for compensating errors in components arranged upstream of amplifier stages |
| 08/26/2009 | CN201298825Y Audio power amplifier current amplifying output circuit with soft start bias |
| 08/26/2009 | CN201298824Y Narrowband low-noise amplifying circuit and digital television receiving terminal |
| 08/26/2009 | CN101517890A Adaptive self-linearization |
| 08/26/2009 | CN101515787A Audio power amplifier device |
| 08/26/2009 | CN101515786A Power amplifier |
| 08/26/2009 | CN101515785A Feedforward amplifier and control method thereof |
| 08/26/2009 | CN101515784A Amplifier, attenuating module and method for attenuating radio frequency signal |
| 08/26/2009 | CN100534075C Adaptive equalizer with DC offset compensation |
| 08/26/2009 | CN100533963C Dynamically accelerated operational amplifier and method thereof |
| 08/26/2009 | CN100533961C Voltage comparator circuit |
| 08/26/2009 | CN100533957C Preserving linearity of an isolator-free power amplifier by dynamically adjusting gain and phase |
| 08/26/2009 | CN100533956C Uncorrelated self-adaptive predistorter |
| 08/26/2009 | CN100533955C Front stage amplifier with different modes |
| 08/26/2009 | CN100533954C Float restraint amplification circuit in sensor network |
| 08/26/2009 | CN100533953C Amplifier circuit having an impedance-controllable bias-boosting circuit |
| 08/26/2009 | CN100533952C High-frequency power amplifier module |
| 08/25/2009 | US7580722 Control of a power amplifier for reducing power consumption in a transceiver |
| 08/25/2009 | US7580686 Adaptive predistortion method and arrangement |
| 08/25/2009 | US7580684 Programmable radio transceiver |
| 08/25/2009 | US7579909 Bypass circuit for radio-frequency amplifier stages |
| 08/25/2009 | US7579885 Charge recycling amplifier for a high dynamic range CMOS imager |
| 08/25/2009 | US7579862 MOS linear region impedance curvature correction |
| 08/20/2009 | WO2009102448A1 Differential current output driver with overvoltage protection |
| 08/20/2009 | WO2009101905A1 Power amplifier |
| 08/20/2009 | WO2009065068A3 Switching amplifiers |
| 08/20/2009 | US20090207940 Predistortion Calibration In A Transceiver Assembly |
| 08/20/2009 | US20090206934 Amplifier auto biasing |
| 08/20/2009 | US20090206933 Dual bias control circuit |
| 08/20/2009 | US20090206929 Operation amplifier for improving slew rate |
| 08/19/2009 | EP2091145A1 Pop noise suppression apparatus and audio output system utilizing the same |
| 08/19/2009 | EP2091144A1 Transmission method and transmission device |
| 08/19/2009 | EP2089966A2 Rf system linearizer using controlled complex nonlinear distortion generators |
| 08/19/2009 | EP2089965A1 A high efficiency modulating rf amplifier |
| 08/19/2009 | EP1719251B1 Control of a power amplifier for reducing power consumption in a transceiver |
| 08/19/2009 | EP1393437B1 Method and apparatus for compensation of second order distortion |
| 08/19/2009 | CN201294489Y Load circuit, power supply circuit and electronic equipment |
| 08/19/2009 | CN201294488Y Sound amplifier capable of reducing DC servo-circuit noise into main amplifier |
| 08/19/2009 | CN201294487Y Low noise DC servo circuit |
| 08/19/2009 | CN101512897A Amplifier employing interleaved signals for PWM ripple suppression |
| 08/19/2009 | CN101512895A Amplifier architecture for polar modulation |
| 08/19/2009 | CN101510761A Operational amplifier circuit and display apparatus using the same |
| 08/19/2009 | CN101510760A High efficiency power amplifier |
| 08/19/2009 | CN101510759A Design method for variable load closed-loop E genus amplifier |
| 08/19/2009 | CN101510758A High frequency power amplifier |
| 08/19/2009 | CN100531166C Method and system for switching mode power amplification |
| 08/19/2009 | CN100531004C Communication apparatus |
| 08/19/2009 | CN100530951C Delay mismatched feed forward amplifier system using penalties and floors for control |
| 08/19/2009 | CN100530949C Multi-mode power amplifier and method for amplifying modulation signal |
| 08/19/2009 | CN100530948C Digital amplifier |
| 08/19/2009 | CN100530947C 放大电路 Amplifier circuit |
| 08/19/2009 | CN100530946C Predistortion method and device based on vector envelope injection |
| 08/19/2009 | CN100530945C Method and system for stabilizing an amplifier |
| 08/19/2009 | CN100530944C Power amplifier pre-distortion |
| 08/19/2009 | CN100530943C Blind linearization using cross-modulation |
| 08/19/2009 | CN100530942C Circuit structure capable of regulating output to temperature slope |
| 08/19/2009 | CN100530941C Feed forward amplifier system using penalties and floors for optimal control |
| 08/19/2009 | CN100530940C Gain fluctuation regulation circuit and method |
| 08/18/2009 | US7577211 Digital predistortion system and method for linearizing an RF power amplifier with nonlinear gain characteristics and memory effects |