| Patents for H03F 1 - Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements (30,272) |
|---|
| 05/12/1999 | EP0832515B1 A low-voltage rail-to-rail operational amplifier |
| 05/11/1999 | US5903854 High-frequency amplifier, transmitting device and receiving device |
| 05/11/1999 | US5903611 Method of correcting nonlinearities of an amplifier, and radio transmitter employing a method of this type |
| 05/11/1999 | US5903422 Overcurrent sensing circuit for power MOS field effect transistor |
| 05/11/1999 | US5903185 Hybrid differential pairs for flat transconductance |
| 05/06/1999 | WO1999022444A1 Linearization method and amplifier arrangement |
| 05/06/1999 | EP0913928A2 Power amplification device |
| 05/06/1999 | EP0913024A1 Oscillator voltage regulator |
| 05/05/1999 | CN1043287C Protection arrangement for audio output channel |
| 05/05/1999 | CN1043272C 电路 Circuit |
| 05/04/1999 | US5901346 Method and apparatus utilizing a compensated multiple output signal source |
| 05/04/1999 | US5901026 Output transistor protection circuit |
| 05/04/1999 | US5900782 AGC voltage correction circuit |
| 05/04/1999 | US5900779 Differential transimpedance amplifier |
| 05/04/1999 | US5900778 Adaptive parametric signal predistorter for compensation of time varying linear and nonlinear amplifier distortion |
| 05/04/1999 | US5900772 Bandgap reference circuit and method |
| 05/04/1999 | US5900765 Bias circuit |
| 05/04/1999 | US5900625 Offset removal circuitry for photoreceiver signals |
| 05/04/1999 | CA2102721C Differential gain stage for use in a standard bipolar ecl process |
| 04/29/1999 | WO1999021273A1 Audio amplifier apparatus and a method for reducing an audible transient |
| 04/29/1999 | WO1999000894A8 Amplifier suitable for cable-network applications |
| 04/28/1999 | EP0911964A1 Optical receiver circuit |
| 04/28/1999 | EP0910895A1 Current feedback differential amplifier clamp |
| 04/28/1999 | EP0910894A1 Method and apparatus for reducing intermodulation distortion in digital wideband transmission systems |
| 04/28/1999 | CN1215511A Method and circuit arrangement for reducing offset voltage of a signal |
| 04/28/1999 | CN1215260A Transmitter for raising power and increasing efficiency and radio equipment using same |
| 04/27/1999 | US5898899 RF broadband amplifier bypass method and apparatus |
| 04/27/1999 | US5898613 pMOS analog EEPROM cell |
| 04/27/1999 | US5898342 Power amplifier arrangement and method for data signal interface |
| 04/27/1999 | US5898341 Differential amplification circuit and method of noise removal |
| 04/27/1999 | US5898339 Feedforward amplifier |
| 04/27/1999 | US5898338 Adaptive digital predistortion linearization and feed-forward correction of RF power amplifier |
| 04/22/1999 | WO1999019990A2 Compensation of delay in linearization loop of power amplifier |
| 04/22/1999 | WO1999019983A1 Single supply voltage to frequency converter optimized for low voltage sensing above and below ground |
| 04/22/1999 | DE19827938A1 Integrated semiconductor circuit module with internal circuit |
| 04/22/1999 | DE19745946A1 Feedback to feedforward transformation for modelling operation of feedback amplifiers |
| 04/21/1999 | EP0910164A1 Improved differential amplifier constituted of bipolar transistors |
| 04/21/1999 | EP0910002A1 Method for providing a current of high accuracy |
| 04/20/1999 | CA2160750C Method and apparatus for increasing amplifier efficiency |
| 04/20/1999 | CA2005610C Dual power source output amplifier |
| 04/15/1999 | WO1999018663A1 High efficiency wideband power amplifier |
| 04/15/1999 | WO1999018662A1 Method and apparatus for reducing power dissipation in multi-carrier amplifiers |
| 04/15/1999 | WO1999003197A3 A high speed and high gain operational amplifier |
| 04/15/1999 | DE19847148A1 Mirror symmetry circuit using differential transistor pairs |
| 04/14/1999 | EP0909044A1 Optical receiver |
| 04/14/1999 | EP0908006A1 Bias circuit for a power amplifier |
| 04/14/1999 | EP0908004A1 Device and method for compensating phase distortion |
| 04/14/1999 | EP0908003A1 Temperature compensated amplifier |
| 04/14/1999 | CN2314515Y Overload protector for power amplifier |
| 04/13/1999 | US5894496 Method and apparatus for detecting and compensating for undesired phase shift in a radio transceiver |
| 04/08/1999 | WO1999017444A1 Multi-layer carrier module for power amplifier |
| 04/08/1999 | WO1999017443A1 Apparatus and method for amplifying a signal |
| 04/08/1999 | WO1999017441A1 A feedforward amplifier |
| 04/08/1999 | WO1999017440A1 Predistortion for high power amplifiers |
| 04/08/1999 | WO1999017439A1 Predistortion system and method using analog feedback loop for look-up table training |
| 04/08/1999 | WO1999017417A1 Power system |
| 04/08/1999 | WO1999005869A3 Adaptive pre-equalization apparatus for correcting linear distortion of a non-ideal data transmission system |
| 04/07/1999 | EP0907297A1 Communications system, network, portable device and method |
| 04/07/1999 | EP0907276A1 Adaptive pre-distortion apparatus for linearizing an amplifier output within a data transmission system |
| 04/07/1999 | EP0906659A1 Oversampled, noise-shaping, mixed-signal processor |
| 04/07/1999 | CN1213215A Bipolar operational transconductance amplifier based on inverse hyperbolic tangent-hyperbolic tangent transformation |
| 04/06/1999 | US5892404 Linear power amplifier with a pulse density modulated switching power supply |
| 04/06/1999 | US5892403 Power interface circuit for a TDMA transmitter |
| 04/06/1999 | US5892401 Solid state power amplifier with low distortion noise protection limiter |
| 04/06/1999 | US5892400 Amplifier using a single polarity power supply and including depletion mode FET and negative voltage generator |
| 04/06/1999 | US5892399 Current boost circuit for reducing crossover distortion in an operational amplifier |
| 04/06/1999 | US5892398 Amplifier having ultra-low distortion |
| 04/06/1999 | US5892397 Adaptive compensation of RF amplifier distortion by injecting predistortion signal derived from respectively different functions of input signal amplitude |
| 04/06/1999 | US5892395 Method and apparatus for efficient signal power amplification |
| 04/06/1999 | US5892381 Fast start-up circuit |
| 04/01/1999 | WO1999016172A2 Temperature compensation in electronic devices |
| 04/01/1999 | DE19844636A1 High impedance circuit with four transistors |
| 03/31/1999 | EP0905919A1 Nonlinear amplifier calibration system and methods |
| 03/31/1999 | EP0905883A2 Temperature compensation circuit for field effect transistor amplifiers |
| 03/31/1999 | EP0905882A1 Offset correction circuit and DC amplification circuit |
| 03/31/1999 | EP0905881A1 Current amplifier, particularly for telephone line |
| 03/31/1999 | EP0904633A1 Power delivery system and method of controlling the power delivery system for use in a radio frequency system |
| 03/31/1999 | EP0760114B1 Dual voltage voltage regulator with foldback current limiting |
| 03/31/1999 | CN1212506A Emitter follower circuit having no temperature dependency |
| 03/31/1999 | CN1212501A Operational amplifier |
| 03/31/1999 | CN1212500A Automatic control system for reducing distortion produced by electrical circuits |
| 03/30/1999 | US5889434 Microwave power amplifier |
| 03/30/1999 | US5889432 Two-stage differential microwave amplifier with bias current sharing and automatic gain control |
| 03/25/1999 | WO1999014854A2 A high frequency amplifier, and a communication receiver or transceiver |
| 03/25/1999 | WO1999000894A3 Amplifier suitable for cable-network applications |
| 03/25/1999 | DE19812651A1 Semiconductor amplifier circuit for HF signals |
| 03/25/1999 | DE19741794A1 Error correction device PWM signals |
| 03/24/1999 | EP0903926A1 Method and circuit for ringing signal generation for subscriber circuits |
| 03/24/1999 | EP0903847A1 Amplifier circuit |
| 03/24/1999 | EP0903009A1 Hybrid matrix amplifier with noise reduction |
| 03/24/1999 | CN1211854A Display driving apparatus having variable driving ability |
| 03/23/1999 | US5886581 Automatic output offset control for a DC-coupled RF amplifier |
| 03/23/1999 | US5886575 Apparatus and method for amplifying a signal |
| 03/23/1999 | US5886573 Amplification using amplitude reconstruction of amplitude and/or angle modulated carrier |
| 03/23/1999 | US5886572 Method and apparatus for reducing distortion in a power amplifier |
| 03/23/1999 | US5886567 Back bias voltage level detector |
| 03/18/1999 | WO1999013569A1 Amplifier circuit |
| 03/17/1999 | EP0902562A2 Circuit for combining input signals of a multiplexer into an output signal |
| 03/17/1999 | EP0902517A2 Circuit with hot-electron protection and method |
| 03/17/1999 | EP0901715A2 Amplifier arrangement |