| 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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| 05/09/2002 | US20020053935 Nonlinearity compensation circuit and method, control circuit and method for nonlinearity compensation circuit and recording and/ or playback apparatus employing the same |
| 05/09/2002 | US20020053729 Semiconductor device |
| 05/08/2002 | EP1204216A1 Method and apparatus for distortion compensation of radio device |
| 05/08/2002 | EP1204202A2 Temperature compensation circuit and a variable gain amplification circuit |
| 05/08/2002 | EP1203445A1 A wideband digital predistortion linearizer for nonlinear amplifiers |
| 05/08/2002 | EP1203444A1 Digital predistortion methods for wideband amplifiers |
| 05/08/2002 | EP1142136A4 Control of gain and power consumption in a power amplifier |
| 05/08/2002 | EP0970561A4 Rail-to-rail operational amplifier |
| 05/08/2002 | EP0906659A4 Oversampled, noise-shaping, mixed-signal processor |
| 05/07/2002 | US6385439 Linear RF power amplifier with optically activated switches |
| 05/07/2002 | US6385436 Distortion compensation circuit |
| 05/07/2002 | US6384689 Preamplifier for optical receivers |
| 05/07/2002 | US6384684 Amplifier |
| 05/07/2002 | US6384681 Swept performance monitor for measuring and correcting RF power amplifier distortion |
| 05/07/2002 | US6384680 RF amplifier with plural combiners |
| 05/07/2002 | US6384678 Silent start |
| 05/07/2002 | US6384540 System for high power RF plasma processing |
| 05/07/2002 | CA2140668C Semiconductor emulation of vacuum tubes |
| 05/03/2002 | CA2359996A1 Rf amplifier with feedback based linearization |
| 05/02/2002 | US20020052665 Utilizing vacuum tubes in computer audio circuitry |
| 05/02/2002 | US20020050865 Power oscillator |
| 05/02/2002 | US20020050862 Operational amplifier |
| 05/02/2002 | US20020050861 Variable transconductance variable gain amplifier utilizing a degenerated differential pair |
| 05/02/2002 | US20020050860 MOS linear transconductance amplifier |
| 05/02/2002 | US20020050858 Preamplifier circuit |
| 05/02/2002 | US20020050857 Variable gain amplifier |
| 05/02/2002 | US20020050856 Scheme for reducing transmit-band noise floor and adjacent channel power with power backoff |
| 05/02/2002 | US20020050855 Semiconductor device |
| 05/02/2002 | US20020050851 Method and apparatus for biasing radio frequency power transistors |
| 05/02/2002 | US20020050848 Voltage clamping circuit |
| 05/02/2002 | US20020050845 High speed variable output power driver |
| 05/02/2002 | US20020050372 Predistortion digital linearizer and gain controlling method thereof |
| 05/02/2002 | EP1202447A1 A method for reducing noise generated in a RF power amplifier |
| 05/02/2002 | EP1202446A2 Power amplifier |
| 05/02/2002 | EP1201028A1 Transistor amplifier having reduced parasitic oscillations |
| 05/02/2002 | EP1201027A1 Parallel amplifier architecture using digital phase control techniques |
| 05/02/2002 | EP1201026A1 Break-before-make distortion compensation for a digital amplifier |
| 05/02/2002 | EP1201025A1 Driving circuits for switch mode rf power amplifiers |
| 05/02/2002 | EP1201024A1 High-efficiency modulating rf amplifier |
| 05/02/2002 | EP1201023A1 Dc offset calibration for a digital switching amplifier |
| 05/02/2002 | DE10153128A1 Audio signal amplifier for use in musical instrument such as guitar, has variable frequency sensitive power attenuation circuit that is manually settable to control output volume from loudspeaker |
| 05/01/2002 | CN1347589A Class D digital amplifier |
| 05/01/2002 | CN1347195A Distortion compensation device and method |
| 05/01/2002 | CN1084085C Operational amplification circuit |
| 04/30/2002 | US6381286 Cartesian loop transmitter |
| 04/30/2002 | US6380808 Push-pull amplifier circuit with idling current control |
| 04/30/2002 | US6380802 Transmitter using input modulation for envelope restoration scheme for linear high-efficiency power amplification |
| 04/30/2002 | CA2359759A1 Reconfigurable device to amplify rf signals |
| 04/30/2002 | CA2091891C Mesfet power amplifier and its power supply, particularly for amplifying microwave signals in a satellite |
| 04/25/2002 | WO2002033860A1 Electric field intensity detecting circuit and limiter amplifier |
| 04/25/2002 | WO2002033820A1 Communications systems |
| 04/25/2002 | WO2002033812A2 Dc-coupling approach for current mode circuits |
| 04/25/2002 | WO2001073942A3 Concurrent multi-band low noise amplifier architecture |
| 04/25/2002 | US20020048379 Guitar amplifier with volume control |
| 04/25/2002 | US20020048326 Method and apparatus for plurality signal generation |
| 04/25/2002 | US20020048110 Amplifier |
| 04/25/2002 | US20020047840 Driving circuit |
| 04/25/2002 | US20020047747 Noise and input impedance matched amplifier |
| 04/25/2002 | US20020047746 Method for linearizing, over a wide frequency band a transmission chain comprising a power amplifier |
| 04/25/2002 | US20020047745 Management of internal signal levels and control of the net gain for a linc amplifier |
| 04/25/2002 | US20020047733 Transistor circuit |
| 04/24/2002 | EP1199814A1 Radio device with distortion compensation |
| 04/24/2002 | EP1199797A1 Method and apparatus for reducing distortion |
| 04/24/2002 | EP1198880A1 Arrangement comprising a first and a second amplifier whereby a maximum of one of said amplifiers amplifies |
| 04/24/2002 | CN1346554A In-line predistorter for linearization of electronic and optical signals |
| 04/24/2002 | CN1346544A Transmitter image suppression in TDD transceivers |
| 04/24/2002 | CN1346538A Multistage amplifier |
| 04/24/2002 | CN1346537A Biasing arrangement for field effect transistors |
| 04/24/2002 | CN1346536A Predistortion generator coupled with RF amplifier |
| 04/24/2002 | CN1346176A Bias circuit for RF power amplifier |
| 04/23/2002 | US6377784 High-efficiency modulation RF amplifier |
| 04/23/2002 | US6377629 Twisted pair communications line system |
| 04/23/2002 | US6377124 Biasing arrangement for field effect transistors |
| 04/23/2002 | US6377119 Feedback cancellation improvements |
| 04/23/2002 | US6377118 Linearizer for power amplifier |
| 04/23/2002 | US6377117 Method and system for efficiently transmitting energy from an RF device |
| 04/23/2002 | US6377116 Pre-distorter and corresponding method for deriving same |
| 04/23/2002 | CA2088750C Linearized output control of a nonlinear amplifier |
| 04/18/2002 | WO2002031996A2 Adjustment of bias current in a first integrated circuit based on a signal gain of a second integrated circuit |
| 04/18/2002 | WO2002031972A2 Amplification circuit with improved linearity |
| 04/18/2002 | WO2002031971A2 Mobile radiotelephony device and method for operating a mobile radiotelephony device |
| 04/18/2002 | WO2002031970A2 Method and apparatus for reducing distortion |
| 04/18/2002 | WO2002031969A2 Linear power amplifier bias circuit |
| 04/18/2002 | WO2002031968A1 High-frequency amplifier |
| 04/18/2002 | WO2002031967A2 Distributed circular geometry power amplifier architecture |
| 04/18/2002 | WO2001086804A3 Ultra-linear feedforward rf power amplifier |
| 04/18/2002 | US20020044121 Liquid crystal panel driving circuit and method of driving a liquid crystal panel |
| 04/18/2002 | US20020044082 Radar detection method and apparatus |
| 04/18/2002 | US20020044020 Amplifier circuit |
| 04/18/2002 | US20020044019 Operational amplifier |
| 04/18/2002 | US20020044017 High frequency power amplifier module and wireless communication apparatus |
| 04/18/2002 | US20020044015 Amplifier circuit and electronic apparatus using the same |
| 04/18/2002 | US20020044014 Amplifier measurement and modeling processes for use in generating predistortion parameters |
| 04/18/2002 | US20020043697 Schottky barrier field effect transistor large in withstanding voltage and small in distortion and return-loss |
| 04/18/2002 | DE10050584A1 Mobile radio device with power amplifier operating voltage regulated for matching control signal amplitude |
| 04/18/2002 | DE10046640C1 Quiescent current compensation circuit has working point circuit for setting working point of mirror circuit for current mirroring of charging current flowing through charging capacitor |
| 04/17/2002 | EP1197001A1 Current-to-voltage converter with controllable gain, and signal processing circuit comprising such converter |
| 04/17/2002 | EP1196988A1 Transmission antenna array system with predistortion |
| 04/17/2002 | EP1196987A1 Linearizer for microwave amplifier |
| 04/17/2002 | EP1196986A2 Redistortion amplifier system with separately controllable amplifiers |