| 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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| 05/29/2007 | US7224228 Semiconductor integrated circuit for high frequency power amplifier, electronic component for high frequency power amplifier, and radio communication system |
| 05/29/2007 | US7224223 Feed-forward power amplifier |
| 05/29/2007 | US7224222 High efficiency linear RF amplifier |
| 05/29/2007 | US7224221 Power amplification apparatus, and mobile communication terminal apparatus |
| 05/29/2007 | US7224220 Low distortion variable gain and rooting amplifier with solid state relay |
| 05/29/2007 | US7224217 Switching amplifier |
| 05/29/2007 | US7224216 Segmented chopping amplifier |
| 05/29/2007 | US7224214 Integrated circuit |
| 05/29/2007 | CA2311475C An amplifier and a method of power amplification |
| 05/24/2007 | WO2007059484A2 Linear rf transmitter and method of operation |
| 05/24/2007 | WO2007057622A1 Amplifier |
| 05/24/2007 | WO2007041710A3 Gallium nitride material transistors and methods for wideband applications |
| 05/24/2007 | US20070116156 Layered modulation for digital signals |
| 05/24/2007 | US20070115052 Amplifiers with compensation |
| 05/24/2007 | US20070115051 Nested transimpedance amplifier |
| 05/24/2007 | US20070115048 Equalizers and offset control |
| 05/24/2007 | US20070115047 Differential amplifier arrangement |
| 05/23/2007 | EP1788700A1 Method for double sampling loop negative feedback and double sampling negative feedback amplifier |
| 05/23/2007 | EP1787387A1 A method and apparatus for pre-conditioning an electrical signal |
| 05/23/2007 | EP1787386A1 An amplifier apparatus and method |
| 05/23/2007 | EP1573901B1 Amplifier circuit having an extended wilson current-mirror self-bias boosting circuit |
| 05/23/2007 | EP1425852A4 Rf power amplifier transistor quiescent current checking and adjusting |
| 05/23/2007 | EP1277274B1 An accurate power detection circuit for use in a power amplifier |
| 05/23/2007 | CN1969459A Digital predistortion system and method for linearizing an RF power amplifier with nonlinear gain characteristics and memory effects |
| 05/23/2007 | CN1969454A Method and device for amplifying an amplitude- and phase-modulated electric signal |
| 05/23/2007 | CN1968009A System for dynamic time offsetting in interleaved power amplifiers |
| 05/23/2007 | CN1968008A Amplifiers with compensation |
| 05/23/2007 | CN1968007A Digital power amplifier adapted for low-voltage carrier communication |
| 05/23/2007 | CN1317883C Adaptive bandwidth control in a kinescope amplifier |
| 05/22/2007 | US7221766 Microphone input buffer biasing circuit |
| 05/22/2007 | US7221327 Tunable matching circuit |
| 05/22/2007 | US7221229 Receiver circuit having an optical reception device |
| 05/22/2007 | US7221227 Methods and apparatus for reducing output current oscillations of a driver provided with circuitry that senses and responds to excessive current draws of an output stage of the driver |
| 05/22/2007 | US7221223 Methods and apparatus of managing a power amplifier |
| 05/22/2007 | US7221222 Methods and apparatus of managing a power amplifier |
| 05/22/2007 | US7221221 Power amplifier with pre-distorter |
| 05/22/2007 | US7221219 Composite amplifier structure |
| 05/22/2007 | US7221218 MOSFET amplifier having feedback controlled transconductance |
| 05/22/2007 | US7221217 Self-bias and digitally tunable conduction angle circuits for a differential RF non-linear power amplifier employing low-voltage transistors |
| 05/18/2007 | WO2007054609A1 Method and arrangement for optimizing efficiency of a power amplifier |
| 05/18/2007 | WO2005094537A3 Model based distortion reduction for power amplifiers |
| 05/17/2007 | US20070109055 Soft saturation detection for power amplifiers |
| 05/17/2007 | US20070109050 Power supply rejection for pulse width modulated amplifiers and automatic gain control |
| 05/17/2007 | US20070109048 Class D amplifier and infrared data receiving apparatus using the same |
| 05/17/2007 | US20070109047 Selecting samples for amplifier digital predistortion estimation |
| 05/17/2007 | US20070109046 Distortrion/efficiency adaptation in a variable-data-rate radio transmitter |
| 05/17/2007 | US20070109045 Power amplifying apparatus |
| 05/17/2007 | US20070109044 Power conversion system |
| 05/17/2007 | US20070109043 Operational amplifier with zero offset |
| 05/17/2007 | US20070109042 Measuring circuit for the output of a power amplifier and a power amplifier comprising the measuring circuit |
| 05/16/2007 | CN2901697Y High voltage broad band pulse amplifier |
| 05/16/2007 | CN1965472A Method and apparatus for DOHERTY amplifier biasing |
| 05/16/2007 | CN1316734C Inter-stage coupling in multistage amplifiers |
| 05/15/2007 | US7218954 LPA shelf and LPA type switching method for a mobile communication base station |
| 05/15/2007 | US7218951 Continuous closed-loop power control system including modulation injection in a wireless transceiver power amplifier |
| 05/15/2007 | US7218909 Integrated low noise amplifier |
| 05/15/2007 | US7218904 Removing close-in interferers through a feedback loop |
| 05/15/2007 | US7218865 Burst-mode optical receiver of differential output structure |
| 05/15/2007 | US7218179 Methods and apparatus for calibrating gm-Z |
| 05/15/2007 | US7218175 Dynamic feedback linearization |
| 05/15/2007 | US7218172 Apparatus and method for controlling adaptive circuits |
| 05/15/2007 | US7218171 Voltage offset measurement for calibration of an integrated circuit amplifier |
| 05/10/2007 | WO2007052389A1 Power amplifier and its idling current setting circuit |
| 05/10/2007 | WO2007052002A1 Monolithic lna support ic |
| 05/10/2007 | US20070105523 Low noise amplifier |
| 05/10/2007 | US20070104493 Optical receiver preamplifier |
| 05/10/2007 | US20070104338 Amplifier Arrangement and Distributed Audio System |
| 05/10/2007 | US20070103238 Method and apparatus for protecting devices in an rf power amplifier |
| 05/10/2007 | US20070103237 Amplifier |
| 05/10/2007 | US20070103236 Apparatus, methods and articles of manufacture for processing an electromagnetic wave |
| 05/10/2007 | US20070103232 Operational amplifier |
| 05/10/2007 | US20070103231 Nested transimpendance amplifier |
| 05/09/2007 | EP1783933A1 Distortion cancellation circuitry for optical receivers |
| 05/09/2007 | EP1783907A1 Low noise, high linearity TV tuner architecture with switched fixed-gain LNA |
| 05/09/2007 | EP1783896A2 Apparatus for optimizing gate bias of radio frequency amplifier and method thereof |
| 05/09/2007 | EP1783895A2 Transconductance amplifiers with compensation |
| 05/09/2007 | EP1783894A2 Amplifiers with compensation |
| 05/09/2007 | EP1782532A1 A method of controlling a linear power amplifier |
| 05/09/2007 | EP1569359B1 Method and apparatus for optimizing transmitter power efficiency |
| 05/09/2007 | EP1425850B1 Circuits and methods for compensating switched mode amplifiers |
| 05/09/2007 | CN2898903Y Special power supply for electronic-tube lining filament |
| 05/09/2007 | CN1960174A Differential amplifiers and semiconductor circuit |
| 05/09/2007 | CN1960172A Filtering free circuit class D power amplifier |
| 05/09/2007 | CN1960170A Output offset protection for power amplifier |
| 05/09/2007 | CN1960169A Amplifiers with compensation |
| 05/09/2007 | CN1960168A Wide-band amplifier |
| 05/09/2007 | CN1960167A High-bandwidth high-gain amplifier |
| 05/09/2007 | CN1960166A High-bandwidth high-gain amplifier |
| 05/09/2007 | CN1960165A 放大器装置 Amplifier means |
| 05/09/2007 | CN1959582A Accurate pure AC voltage/current convertor with low noise |
| 05/08/2007 | US7215717 Distortion compensation circuit |
| 05/08/2007 | US7215206 Stacked RF power amplifier |
| 05/08/2007 | US7215203 High frequency power amplifier circuit device |
| 05/08/2007 | US7215196 Variable impedance circuit, variable gain differential amplifier, multiplier, high-frequency circuit and differential distributed amplifier |
| 05/08/2007 | US7215192 High efficiency power amplifier |
| 05/08/2007 | US7215160 Switched operation amplifier |
| 05/03/2007 | WO2007050961A2 Operational amplifier with zero offset |
| 05/03/2007 | WO2007049474A1 Predistortion type distortion compensation amplification device |
| 05/03/2007 | WO2007049390A1 Differential amplifier |
| 05/03/2007 | WO2007049386A1 Open gain adjustment circuit for operational amplifier |