| Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008) |
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| 05/06/1999 | WO1999010977A3 Amplifier with controllable output current |
| 05/06/1999 | EP0913932A2 A buffering integrated circuit |
| 05/06/1999 | EP0913931A1 High gain amplifier with limited output dynamic |
| 05/06/1999 | EP0913930A2 BTL amplifying circuit |
| 05/06/1999 | EP0913929A2 Audio output amplifier with parallel class AB stages |
| 05/06/1999 | EP0913928A2 Power amplification device |
| 05/06/1999 | EP0913926A1 Integrated power amplifier which allows parallel connections |
| 05/06/1999 | EP0913029A1 A method and device for continuous-time filtering in digital cmos process |
| 05/05/1999 | CN1043287C Protection arrangement for audio output channel |
| 05/05/1999 | CN1043272C 电路 Circuit |
| 05/04/1999 | US5901345 Transmitter of wireless system and high frequency power amplifier used therein |
| 05/04/1999 | US5901221 Driving stage for driving differential amplifiers of a subscriber line interface circuit |
| 05/04/1999 | US5900783 Low voltage class AB output stage CMOS operational amplifiers |
| 05/04/1999 | US5900782 AGC voltage correction circuit |
| 05/04/1999 | US5900781 Multistage variable gain amplifier circuit |
| 05/04/1999 | US5900780 Amplifier circuit for CMOS operational amplifier |
| 05/04/1999 | US5900779 Differential transimpedance amplifier |
| 05/04/1999 | US5900776 Current sense circuit |
| 05/04/1999 | US5900774 Direct current differential base voltage generating circuit |
| 05/04/1999 | US5900772 Bandgap reference circuit and method |
| 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 | WO1999021278A1 Low-voltage comparator with wide input voltage swing |
| 04/29/1999 | WO1999008378A3 Device for amplifying digital signals |
| 04/28/1999 | EP0912000A2 Optical signal receiving circuit and method for receiving optical signal |
| 04/28/1999 | EP0911985A2 Dual band transmitter with switchable matching circuit |
| 04/28/1999 | EP0911969A1 Amplifier circuit with dual gain |
| 04/28/1999 | EP0911964A1 Optical receiver circuit |
| 04/28/1999 | EP0910895A1 Current feedback differential amplifier clamp |
| 04/27/1999 | US5898899 RF broadband amplifier bypass method and apparatus |
| 04/27/1999 | US5898613 pMOS analog EEPROM cell |
| 04/27/1999 | US5898341 Differential amplification circuit and method of noise removal |
| 04/27/1999 | US5898340 High power efficiency audio amplifier with digital audio and volume inputs |
| 04/27/1999 | US5898323 Level comparator |
| 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 | WO1999003218A8 Data reception circuit for infrared signals |
| 04/21/1999 | EP0910164A1 Improved differential amplifier constituted of bipolar transistors |
| 04/21/1999 | CN1214814A Conversion of PCM signal into UPWM signal |
| 04/21/1999 | CN1043110C Apparatus for virtual expansion of power supply capacity |
| 04/21/1999 | CN1043105C 差分比较器电路 Differential comparator circuit |
| 04/20/1999 | US5896065 Radially combined RF/microwave power amplifier |
| 04/20/1999 | US5896062 Amplifier with switched DC bias voltage feedback |
| 04/20/1999 | US5896051 Output circuit and output circuit device |
| 04/20/1999 | CA2160750C Method and apparatus for increasing amplifier efficiency |
| 04/15/1999 | WO1999018666A1 Signal processor with local signal behavior |
| 04/15/1999 | WO1999018663A1 High efficiency wideband power amplifier |
| 04/15/1999 | WO1999018661A1 Push-pull mixer |
| 04/15/1999 | WO1999003197A3 A high speed and high gain operational amplifier |
| 04/15/1999 | CA2305381A1 Signal processor with local signal behavior |
| 04/14/1999 | EP0909044A1 Optical receiver |
| 04/14/1999 | EP0909021A2 Transimpedance pre-amplifier for optical communication |
| 04/14/1999 | EP0908007A2 Radio receiver and controllable amplifier circuit |
| 04/14/1999 | EP0908006A1 Bias circuit for a power amplifier |
| 04/14/1999 | EP0908005A1 Differential amplifier |
| 04/14/1999 | EP0908004A1 Device and method for compensating phase distortion |
| 04/13/1999 | US5894284 Common-mode output sensing circuit |
| 04/13/1999 | US5894245 Operational amplifier |
| 04/13/1999 | US5894236 Output circuit with increased output current |
| 04/08/1999 | WO1999004529A3 Voltage controlled oscillator |
| 04/07/1999 | EP0906662A1 Low voltage analog front end |
| 04/07/1999 | EP0906661A2 A bridged driving amplifier and a telecommunication device |
| 04/07/1999 | EP0906660A1 Low power audio device |
| 04/07/1999 | EP0906659A1 Oversampled, noise-shaping, mixed-signal processor |
| 04/07/1999 | CN1213465A Tuning amplifier |
| 04/07/1999 | CN1213236A Light receiving amplifying device |
| 04/07/1999 | CN1213235A Data communication receiving element |
| 04/07/1999 | CN1213215A Bipolar operational transconductance amplifier based on inverse hyperbolic tangent-hyperbolic tangent transformation |
| 04/07/1999 | CN1213214A Power splitter/combiner circuit, high power amplifier and balun circuit |
| 04/06/1999 | US5893028 Intermediate frequency gain stage with rectifier |
| 04/06/1999 | US5892616 Optical amplifier with reduced surge output |
| 04/06/1999 | US5892609 Digital signal receiver circuit |
| 04/06/1999 | US5892403 Power interface circuit for a TDMA transmitter |
| 04/06/1999 | US5892402 High precision current output circuit |
| 04/06/1999 | US5892400 Amplifier using a single polarity power supply and including depletion mode FET and negative voltage generator |
| 04/06/1999 | US5892398 Amplifier having ultra-low distortion |
| 04/06/1999 | US5892395 Method and apparatus for efficient signal power amplification |
| 04/06/1999 | US5892356 High impedance large output voltage regulated cascode current mirror structure and method |
| 04/06/1999 | US5892347 Tape drive with high performance gain amplifier using radio frequency dielectric heating |
| 04/06/1999 | CA2247694A1 Audio output amplifier with parallel class ab stages |
| 04/01/1999 | WO1998057430A3 A gm-C CELL WITH TWO-STAGE COMMON MODE CONTROL AND CURRENT BOOST |
| 04/01/1999 | DE19742826A1 Optical input circuit with reception diode |
| 03/31/1999 | EP0905925A2 Light receiving amplifying device |
| 03/31/1999 | EP0905894A2 Data receiver using waveform shaping |
| 03/31/1999 | EP0905882A1 Offset correction circuit and DC amplification circuit |
| 03/31/1999 | EP0905880A1 Device and method for the offset voltage compensation of a mixer |
| 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 | CN1212523A Liquid crystal display driving semiconductor device |
| 03/31/1999 | CN1212506A Emitter follower circuit having no temperature dependency |
| 03/31/1999 | CN1212502A Double end output stage device of differential operational amplifier |
| 03/31/1999 | CN1212501A Operational amplifier |
| 03/30/1999 | US5889605 Detection device including means for automatically slaving the sensitivity of a pin photodiode |
| 03/30/1999 | US5889434 Microwave power amplifier |
| 03/30/1999 | US5889433 Amplifier having a high current efficiency |
| 03/30/1999 | US5889432 Two-stage differential microwave amplifier with bias current sharing and automatic gain control |
| 03/30/1999 | US5889426 Integrated circuit device having a bias circuit for an enhancement transistor circuit |
| 03/30/1999 | US5889419 Differential comparison circuit having improved common mode range |
| 03/30/1999 | US5889297 High frequency semiconductor device with slots |
| 03/25/1999 | WO1999014854A2 A high frequency amplifier, and a communication receiver or transceiver |
| 03/25/1999 | DE19812651A1 Semiconductor amplifier circuit for HF signals |