| 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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| 02/18/2010 | US20100039174 Rf system linearizer using controlled complex nonlinear distortion generators |
| 02/17/2010 | EP2154852A2 DC Offset correction in a transmitter |
| 02/17/2010 | EP2154783A1 Amplifying circuit |
| 02/17/2010 | EP2153519A1 Polar amplifier |
| 02/17/2010 | EP2153518A1 A multi-antenna beam-forming system for transmitting constant envelope signals decomposed from a variable envelope signal |
| 02/17/2010 | CN201409116Y Radio-frequency power amplifier biasing circuit |
| 02/17/2010 | CN101651448A Method and system for protecting data information of power amplifier |
| 02/17/2010 | CN101651447A Amplifying circuit |
| 02/16/2010 | US7664473 Amplifier control device |
| 02/16/2010 | US7663442 Data receiver including a transconductance amplifier |
| 02/16/2010 | US7663436 Power amplifier with distortion compensation circuit |
| 02/16/2010 | US7663433 Audio amplifier |
| 02/11/2010 | WO2010016444A1 Power amplification device, and transmission device and communication device using same |
| 02/11/2010 | US20100033246 Adaptive digital predistortion of complex modulated waveform using peak and rms voltage feedback from the output of a power amplifier |
| 02/11/2010 | US20100033240 Chopper-stabilized instrumentation amplifier for impedance measurement |
| 02/11/2010 | DE102004033129B4 Ansteuerschaltung, Vorrichtung und Verfahren zur Geräuschunterdrückung Drive circuit, apparatus and method for noise suppression |
| 02/10/2010 | EP2151049A1 Dual mode power amplifier |
| 02/10/2010 | EP2151047A1 Linear rf amplifier with polar feedback |
| 02/10/2010 | CN201403074Y Enhanced simulating predistortion linearized power amplifier |
| 02/10/2010 | CN101647196A Differential amplifier with active post-distortion linearization |
| 02/10/2010 | CN101647195A Distortion compensation controller and distortion compensation control method |
| 02/10/2010 | CN101647194A An improved amplifier |
| 02/10/2010 | CN100589321C Apparatus and method for realizing digital predistortion |
| 02/10/2010 | CN100589320C Feedforward linear power amplifying circuit and control method thereof |
| 02/10/2010 | CN100589319C Power amplifier temperature compensation device and method |
| 02/09/2010 | US7659777 Offset adjustment device, semiconductor device, display device, offset adjustment method, noise detection device, and noise detection method |
| 02/09/2010 | US7659776 Offset voltage correction for high gain amplifier |
| 02/04/2010 | WO2010014993A1 Adaptive bias current generation for switched-capacitor circuits |
| 02/04/2010 | WO2010014802A1 Driver amplifier having a programmable output impedance adjustment circuit |
| 02/04/2010 | WO2010013514A1 Power amplification device, and transmission device and communication device both using thereof |
| 02/04/2010 | US20100026393 Driver amplifier having a programmable output impedance adjustment circuit |
| 02/04/2010 | US20100026392 Method and apparatus for output amplifier protection |
| 02/04/2010 | US20100026386 Amplifier front-end with low-noise level shift |
| 02/04/2010 | DE102008034456A1 Direct current coupled cascaded transistor amplifier for providing high output voltage to electrostatic loudspeaker of high end stereo system, has optoelectronic coupler bridging potential difference between pre-stage and driver stages |
| 02/03/2010 | EP1787387B1 A method and apparatus for pre-conditioning an electrical signal |
| 02/03/2010 | CN201398189Y Mobile phone transmission signal amplifying circuit |
| 02/03/2010 | CN201398177Y Doherty power amplifier |
| 02/03/2010 | CN201397159Y Preamplifier circuit of whirling flow meter |
| 02/03/2010 | CN101641862A Linear transconductor for RF communications |
| 02/03/2010 | CN100588114C Protection and automatic restoring system |
| 02/03/2010 | CN100588113C Method for linearising high-frequency amplifier |
| 02/03/2010 | CN100588112C Device and method for realizing wide band micro power linear power amplication |
| 02/03/2010 | CN100588111C Integrated circuit devices having biasing control circuit and method of operating the same |
| 02/02/2010 | US7656964 Forward and reverse VSWR insensitive power detection using phase shifting and harmonic filtering |
| 02/02/2010 | US7656227 Techniques to control amplifier gain over process, voltage, and/or temperature (PVT) variations |
| 02/02/2010 | US7656226 Switched capacitor equalizer with offset voltage cancelling |
| 01/28/2010 | WO2010010525A1 Vswr compensation circuits for rf transmit chain |
| 01/28/2010 | US20100019842 Low-noise, wide offset range, programmable input offset amplifier front end and method |
| 01/28/2010 | US20100019841 Minimizing Changes In Common Mode Voltage At Inputs Of An Operational Amplifier Used In A Switched Capacitor Differential Amplifier |
| 01/28/2010 | US20100019840 Power amplifier |
| 01/28/2010 | US20100019132 Optical receiver |
| 01/28/2010 | DE10066032B4 Schaltungsanordnung zur Steuerung der Verstärkung einer Verstärkerschaltung Circuit arrangement for controlling the gain of an amplifier circuit |
| 01/27/2010 | EP2148434A1 Radio frequency circuit with electrostatic protection and impedance matching and method for calibrating the same |
| 01/27/2010 | EP2148433A1 Wide-range low-noise amplifier |
| 01/27/2010 | EP2147501A1 Differential amplifier with active post-distortion linearization |
| 01/27/2010 | CN201393204Y Low-noise amplifier protective circuit and wireless transmit-receive system applying same |
| 01/27/2010 | CN201393203Y Power amplifier temperature compensation device |
| 01/27/2010 | CN100586023C A switched capacitor circuit compensation apparatus and method |
| 01/27/2010 | CN100586009C Amplifier |
| 01/26/2010 | US7653366 Hybrid switched mode/linear power amplifier power supply for use in polar transmitter |
| 01/26/2010 | US7652538 Circuits and methods for improving slew rate of differential amplifiers |
| 01/26/2010 | US7652536 Amplifier circuit with internal zeros |
| 01/26/2010 | US7652532 Correlation method for monitoring power amplifier |
| 01/26/2010 | US7652531 Low cost high performance power amplifier utilizing two-stage-included local negative feedback with feedback-shifting technology |
| 01/26/2010 | US7652530 Amplifier circuit and method of generating bias voltage in amplifier circuit |
| 01/26/2010 | US7652528 Analog switch controller |
| 01/21/2010 | WO2010008586A2 Low-noise high efficiency bias generation circuits and method |
| 01/21/2010 | WO2010008506A1 Anti-pop circuits and methods for audio amplifiers using variable resistors |
| 01/21/2010 | WO2010008188A2 Combination-type amplifier with multiple power sources |
| 01/21/2010 | WO2010007721A1 Power amplifier, power amplifier nonlinear distortion correction method, and wireless communication device |
| 01/21/2010 | WO2010007177A1 Dual-loop feedback amplifying circuit |
| 01/21/2010 | WO2009146133A3 High-voltage impulse amplifier |
| 01/21/2010 | DE112004002699B4 Doherty-Verstärker unter Verwendung eines aktiven Phasenteilers Doherty amplifier using an active phase splitter |
| 01/20/2010 | EP2146429A1 System and method for reducing flicker noise from CMOS amplifiers |
| 01/20/2010 | EP2145386A1 Multiport amplifiers in communications satellites |
| 01/20/2010 | EP2145385A2 N-way doherty distributed power amplifier |
| 01/20/2010 | EP2145382A1 Power supplies for rf power amplifier |
| 01/20/2010 | CN201388209Y Predistortion processing unit |
| 01/20/2010 | CN201388186Y Equal-amplitude amplifying circuit of high-speed data acquisition system used in ultrasonic testing |
| 01/20/2010 | CN100583655C Power limit device and digital radio transmitter using the same |
| 01/20/2010 | CN100583624C Calculation amplifier with wide work voltage scope in band gap circuit |
| 01/19/2010 | US7650132 Low noise amplifier (LNA) gain switch circuit |
| 01/19/2010 | US7649958 Transmit signal generator and method |
| 01/19/2010 | US7649414 Methods and apparatus to reduce substrate voltage bounces and spike voltages in switching amplifiers |
| 01/19/2010 | US7649411 Segmented power amplifier |
| 01/14/2010 | WO2010004492A1 Digital amplifier with feedforward and feedback control |
| 01/14/2010 | WO2010003865A1 Doherty amplifier with input network optimized for mmic |
| 01/14/2010 | WO2009134590A4 Combined feedback and feed-forward linearisation of rf power amplifiers |
| 01/14/2010 | WO2009126007A3 Method of power amplifier predistortion adaptation using compression detection and circuit thereof |
| 01/14/2010 | WO2009117982A4 Method and device for compensating amplification variations in an amplifier circuit |
| 01/14/2010 | US20100009639 Radio frequency unit analog level detector and feedback control system |
| 01/14/2010 | US20100007418 Input system for a variable gain amplifier having class-ab transconductance stages |
| 01/14/2010 | US20100007416 Wideband differential amplifier including single-ended amplifiers coupled to a four-port transformer |
| 01/14/2010 | US20100007415 Signal nonlinear distoration magnitude detection method and device |
| 01/14/2010 | CA2728337A1 Method and apparatus for power converter for class d audio power amplifiers |
| 01/13/2010 | EP2144366A1 Amplifier circuit |
| 01/13/2010 | EP2144365A1 Device for amplifying signals with an envelope tracking technique or an envelope extraction and restoration technique controlled by a switched modulation |
| 01/13/2010 | EP2143209A1 Digital hybrid mode power amplifier system |
| 01/13/2010 | EP2143202A1 A method and apparatus to linearize transconductors by predistortion |
| 01/13/2010 | EP2143201A1 An improved amplifier |