| 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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| 01/21/2004 | EP1382115A2 Automatic optimization of linearity for envelope feedback rf amplifier linearization |
| 01/21/2004 | EP1382113A1 Amplifier |
| 01/21/2004 | EP1382112A2 Electrical signal pre-conditioning |
| 01/21/2004 | EP1382083A1 Tunable multiplexer |
| 01/21/2004 | EP0919082B1 A differential amplifier, an integrated circuit, and a telephone |
| 01/21/2004 | CN1470102A Power control and modulation of switched-mode power amplifiers with one or more stages |
| 01/21/2004 | CN1470101A Variable bias control for switch mode RF amplifier |
| 01/20/2004 | US6680652 Load switching for transmissions with different peak-to-average power ratios |
| 01/20/2004 | US6680651 Current mirror and differential amplifier for providing large current ratio and high output impedence |
| 01/20/2004 | US6680650 MOSFET well biasing scheme that migrates body effect |
| 01/20/2004 | US6680649 Coordinate rotation of pre-distortion vector in feedforward linearization amplification system |
| 01/20/2004 | US6680648 High power amplifier predistorter system |
| 01/15/2004 | WO2004006429A1 Semiconductor integrated circuit and semiconductor integrated circuit manufacturing method |
| 01/15/2004 | WO2004006428A1 Inline presistortion for both cso and ctb correction |
| 01/15/2004 | WO2002054595A9 Input stage with selectable input impedance |
| 01/15/2004 | US20040008083 Inline predistortion for both CSO and CTB correction |
| 01/15/2004 | US20040008082 Power amplifier with load switching circuit |
| 01/15/2004 | US20040008081 Power amplification by using different fixed power supply signals for the amplifier |
| 01/15/2004 | US20040008017 Low voltage large swing/high linearity analog buffer with servo amplifier and feedback loop |
| 01/15/2004 | DE4498744B4 Vorrichtung und Verfahren zum Frequenzkompensieren eines Operationsverstärkers Apparatus and method for frequency compensating an operational amplifier |
| 01/14/2004 | EP1381155A2 A power amplifier distortion compensation apparatus and method thereof |
| 01/14/2004 | EP1381154A1 Power amplification by using different fixed power supply signals for the amplifier |
| 01/14/2004 | EP1380106A1 Tunable matching circuit |
| 01/14/2004 | EP1380100A2 Self-boosting circuit for a power amplifier |
| 01/14/2004 | EP1379929A1 Amplifier system with on-demand power supply boost |
| 01/14/2004 | CN1468475A Electric field intensity detecting circuit and limiter amplifier |
| 01/14/2004 | CN1468464A Configurable power amplifier and bias control |
| 01/14/2004 | CN1134901C High-frequency amplifier, transmitting device, receiving device and method for controlling amplifier status |
| 01/14/2004 | CN1134898C Transmission final stage for mobile telephone |
| 01/14/2004 | CN1134886C Combined linear power amplifying device and method |
| 01/13/2004 | US6678513 Non-linear transistor circuits with thermal stability |
| 01/13/2004 | US6677870 Device and method for compensating for nonlinearity of power amplifier with predistortion in IF band |
| 01/13/2004 | US6677823 Gain compensation circuit using a variable offset voltage |
| 01/13/2004 | US6677821 Distortion compensating apparatus |
| 01/13/2004 | US6677820 Distortion compensation apparatus |
| 01/13/2004 | US6677819 Power amplifier unit |
| 01/13/2004 | US6677817 Feed forward amplifier with amplifier stage failure detection using pilot tones |
| 01/08/2004 | WO2004004307A2 Even order distortion elimination in push-pull or differential amplifiers and circuits |
| 01/08/2004 | WO2004004144A1 Blind cancellation of cross-modulation by addition of modulated signal |
| 01/08/2004 | WO2004004116A1 Blind linearization using cross-modulation |
| 01/08/2004 | WO2004004114A2 System and method for protecting an audio amplifier output stage power transistor |
| 01/08/2004 | WO2003034388A3 Circuit for predictive control of boost current in a passive matrix oled display and method therefor |
| 01/08/2004 | WO2002031967A3 Distributed circular geometry power amplifier architecture |
| 01/08/2004 | US20040004800 Eeprom circuit voltage reference circuit and method for providing a low temperature-coefficient voltage reference |
| 01/08/2004 | US20040004590 Method and system for adjusting precharge for consistent exposure voltage |
| 01/08/2004 | US20040004519 Broadband amplification apparatus for bandwidth expansion |
| 01/08/2004 | US20040004518 Radio-frequency amplifier |
| 01/08/2004 | US20040004516 Power amplifier distortion compensation apparatus and method thereof |
| 01/08/2004 | US20040004179 Temperature compensating circuit, temperature compensating logarithm conversion circuit and light receiver |
| 01/08/2004 | DE19946459B4 Rauscharme breitbandige Verstärkereinrichtung sowie Verwendung der Verstärkereinrichtung Low-noise broadband amplifier device and use the amplifier device |
| 01/08/2004 | CA2490940A1 Even order distortion elimination in push-pull or differential amplifiers and circuits |
| 01/07/2004 | WO2004055977A2 Phase corrected miller compensation of chopper and nested chopper amplifiers |
| 01/07/2004 | EP1378991A1 Voltage buffer for large gate loads with rail-to-rail operation and preferable use in LDO'S |
| 01/07/2004 | EP1378057A2 Saturation prevention and amplifier distortion reduction |
| 01/07/2004 | EP1377994A1 Tunable ferro-electric filter |
| 01/07/2004 | EP1377839A1 Low-loss tunable ferro-electric device and method of characterization |
| 01/07/2004 | CN2598256Y Transistor impedance transformer |
| 01/07/2004 | CN1466265A Error loop self-adaptive cancellation control method for feedforward linear power amplifier |
| 01/07/2004 | CN1134196C Cell powered mobile phone with, radio frequency power amplifier for radio communication system |
| 01/07/2004 | CN1134106C Active low-pass filter |
| 01/06/2004 | US6674808 Post-amplifier filter rejection equalization |
| 01/06/2004 | US6674337 Concurrent multi-band low noise amplifier architecture |
| 01/06/2004 | US6674335 Blind linearization using cross-modulation |
| 01/06/2004 | US6674328 Amplifier circuit |
| 01/06/2004 | US6674326 Digitally controllable nonlinear pre-equalizer |
| 01/06/2004 | US6674324 System and method for producing an amplified signal using plurality of amplitudes across spectrum |
| 01/06/2004 | US6674323 High frequency power amplifier, high frequency power amplifier module, and portable telephone |
| 01/06/2004 | CA2325326C System and method for producing amplified signal(s) or version(s) thereof |
| 01/06/2004 | CA2279095C Frequency hop pilot technique for a control system that reduces distortion produced by electrical circuits |
| 01/02/2004 | EP1376862A2 Asymmetric, voltage optimized, wideband common-gate bi-directional mmic amplifier |
| 01/02/2004 | EP1376858A1 Pulse modulation power amplifier with enhanced cascade control method |
| 01/02/2004 | EP1376856A2 Nonlinear distortion compensating circuit |
| 01/02/2004 | EP1376855A2 Bias control for hbt power amplifiers |
| 01/02/2004 | EP1374518A2 Signal processing of an amplitude-modulated and/or phase-modulated high-frequency signal according to the principle of envelope elimination and restoration |
| 01/02/2004 | EP1374398A2 Circuit and method for input side impedance matching of a power amplifier in an electronic device |
| 01/02/2004 | EP1374393A2 High efficciency switching amplifiers |
| 01/02/2004 | EP1374392A1 Amplifying circuit |
| 01/02/2004 | EP1374391A1 Balanced transformer-less amplifier and an offset detection and correction system therefore |
| 01/02/2004 | EP1374390A2 Dc-coupling approach for current mode circuits |
| 01/02/2004 | EP1374389A2 System and method for rf signal amplification |
| 01/02/2004 | EP1374388A1 Bias adjustment for power amplifier |
| 01/01/2004 | US20040002300 Blind modulation cancellation by addition of modulated signal |
| 01/01/2004 | US20040001559 Postdistortion amplifier with predistorted postdistortion |
| 01/01/2004 | US20040000954 Power amplifier having a bias current control circuit |
| 01/01/2004 | US20040000953 Bias control for HBT power amplifiers |
| 01/01/2004 | US20040000952 Shared-current electronic systems |
| 01/01/2004 | US20040000948 RF amplifier with enhanced efficiency |
| 01/01/2004 | US20040000938 Blind linearization using cross-modulation |
| 12/31/2003 | WO2004002120A2 Improvements in or relating to battery powered devices |
| 12/31/2003 | WO2004002006A1 Method for tuning an envelope tracking amplification system |
| 12/31/2003 | WO2004001989A1 Transmitter |
| 12/31/2003 | WO2004001958A1 Efficient generation of radio frequency currents |
| 12/31/2003 | WO2004001957A1 Improved power amplifier configuration |
| 12/31/2003 | WO2004001956A2 Forward amplifiers |
| 12/31/2003 | WO2003030353A3 An amplifier pre-distorter method and apparatus |
| 12/31/2003 | WO2003021766A3 Switching power supply for rf power amplifiers |
| 12/31/2003 | WO2002103892A3 Methods and apparatus for signal distortion correction |
| 12/31/2003 | CN1465074A Eeprom circuit voltage reference circuit and method for providing a low temperature-coefficient voltage reference |
| 12/31/2003 | CN1133279C Autogain control circuit and receiver having said circuit |
| 12/31/2003 | CA2527628A1 Forward amplifiers |