| 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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| 07/27/1993 | CA2024353C Volterra linearizer for digital transmission |
| 07/27/1993 | CA2024199C Negative feedback system servo control and its application to amplifiers and servomechanisms |
| 07/21/1993 | EP0552059A1 Power amplifier device |
| 07/21/1993 | EP0552039A1 Transmitter tuning |
| 07/21/1993 | EP0551910A2 Offset detecting circuit and output circuit and integrated circuit including the output circuit |
| 07/21/1993 | CN1021688C Linear transmitter training method and apparatus |
| 07/20/1993 | US5229733 Amplifier arrangement for protecting the power transistors in case of a short-circuit |
| 07/20/1993 | US5229721 Micropower amplifier/transducer driver with signal expansion |
| 07/20/1993 | US5229720 Vca circuit |
| 07/20/1993 | US5229719 Amplifier with short time lag |
| 07/20/1993 | US5229599 Amplifying circuit arrangement with a signal source having a hi-ohmic output impedance |
| 07/20/1993 | CA1320604C Transmitter circuit for efficiently transmitting communication traffic via phase modulated carrier signals |
| 07/19/1993 | CA2087231A1 Method and circuit arrangement for offset correction in a tdma radio receiver |
| 07/14/1993 | CN1021611C Amplifier arrangement |
| 07/13/1993 | US5227736 Second-order predistorter |
| 07/13/1993 | US5227735 Technique to drive transformer coupled line amplifier |
| 07/08/1993 | WO1993013594A1 Radio frequency amplifiers |
| 07/08/1993 | WO1993013593A2 Transimpedance amplifier |
| 07/07/1993 | EP0541789A4 Feed forward amplifier network with frequency swept pilot tone |
| 07/07/1993 | CN1074066A Series-parallel feedback wide-band transistor amplifie |
| 07/07/1993 | CN1021533C Ac voltage amplifier |
| 06/30/1993 | EP0549192A1 Spurious frequency suppressor |
| 06/30/1993 | EP0549101A2 Amplifier with multiple switched stages and noise suppression |
| 06/30/1993 | EP0549045A1 Semi-conductor device comprising a differential amplifier with two stages |
| 06/30/1993 | EP0548524A2 Comparator start-up arrangement |
| 06/29/1993 | US5224169 Protection arrangement for an audio output channel |
| 06/29/1993 | US5223753 Slew rate speed-up circuit |
| 06/29/1993 | US5223743 Adaptive current generating transconductance circuit |
| 06/23/1993 | EP0547871A1 Improvements in or relating to amplifiers |
| 06/22/1993 | US5221910 Single-pin amplifier in integrated circuit form |
| 06/22/1993 | US5221908 Wideband integrated distortion equalizer |
| 06/22/1993 | US5221888 Current limited temperature responsive circuit |
| 06/16/1993 | EP0546638A1 Stabilized transient response of a cascode CMOS amplifier |
| 06/16/1993 | EP0546571A1 Amplifier circuit for electret condenser microphone |
| 06/15/1993 | US5220686 Tunable resonance amplifier |
| 06/15/1993 | US5220613 Audio amplifier circuit |
| 06/15/1993 | US5220289 Differential amplifier circuit |
| 06/09/1993 | EP0545449A1 Trim correction circuit with temperature coefficient compensation |
| 06/09/1993 | DE4140263A1 Power amplifier for HF and HV output - has push=pull power MOSFETS as output devices driven by symmetrical supply voltages via pre-amplifier circuits |
| 06/08/1993 | US5218323 Transistor direct-coupled amplifier |
| 06/08/1993 | US5218317 Charged-coupled device for high-power transmitters |
| 06/08/1993 | CA1318945C Switchable dc power supply with increased efficiency for use in large wattage amplifiers |
| 06/02/1993 | EP0544627A1 Circuit for neutralizing thermal drift in a transconductance stage |
| 06/02/1993 | EP0544387A1 High gain monolithic microwave integrated circuit amplifier |
| 06/02/1993 | EP0544193A1 Differential protective device for a modular amplifier |
| 06/02/1993 | EP0544117A1 Linear amplifier performing distortion compensation control |
| 06/01/1993 | US5216386 Transimpedance amplifier |
| 06/01/1993 | US5216382 Single ended push pull amplifier circuit |
| 06/01/1993 | US5216379 Dynamic bias amplifier |
| 06/01/1993 | US5216354 Controllable voltage-to-current converter having third-order distortion reduction |
| 05/27/1993 | WO1993010603A1 Shunt-expansive predistortion linearizers for optical analog transmitters |
| 05/19/1993 | EP0541933A1 Distortion correction for an amplifier system |
| 05/19/1993 | EP0541789A1 Feed forward amplifier network with frequency swept pilot tone |
| 05/18/1993 | US5212457 Input buffer with reduced offset for operational amplifiers or the like |
| 05/18/1993 | US5212456 Wide-dynamic-range amplifier with a charge-pump load and energizing circuit |
| 05/18/1993 | US5212455 Differential output, power, cmos, operational amplifier |
| 05/13/1993 | WO1993009599A2 Analog-to-digital converter and method of fabrication |
| 05/13/1993 | WO1993009597A1 Temperature compensated cmos voltage to current converter |
| 05/12/1993 | EP0541097A1 Protection circuit |
| 05/11/1993 | US5210633 Apparatus and method for linearizing the operation of an external optical modulator |
| 05/11/1993 | US5210506 Large swing output buffer amplifier |
| 05/11/1993 | US5210502 Servo distortion trim for DBX VCA |
| 05/09/1993 | CA2081787A1 Protection circuit |
| 05/05/1993 | EP0540287A2 Dynamic power compensation |
| 05/05/1993 | EP0540146A2 Apparatus for controlling consumption power for GaAs fet |
| 05/04/1993 | US5208551 Noise reduction circuit with a main signal path and an auxiliary signal path having a high-pass filter characteristic |
| 04/28/1993 | EP0539070A1 Transmitter switch-on in a dual-mode mobile phone |
| 04/27/1993 | US5206602 Biomedical amplifier circuit |
| 04/27/1993 | US5205619 Electronic circuit for surveillance of final amplifier and its load |
| 04/22/1993 | DE4134177A1 Tetrode circuit, e.g. for HF power amplifier - comprises two FET(s) forming tetrode with signal input and control input, two potential dividers and third FET for automatic gain control |
| 04/21/1993 | EP0537792A1 Power amplifier, in particular, audio amplifier |
| 04/20/1993 | US5204789 Low noise voltage-biasing amplifier for magnetoresistive element |
| 04/20/1993 | US5204639 Miller loop compensation network with capacitive drive |
| 04/20/1993 | US5204636 Dynamic limiting circuit for an amplifier |
| 04/15/1993 | DE4133502A1 Push=pull power amplifier with two asymmetric control stages - has one stage as adjuster of voltage superimposing current source |
| 04/13/1993 | US5202646 Output stage for amplifiers |
| 04/13/1993 | US5202645 Stabilized transient response of a cascode CMOS amplifier |
| 04/13/1993 | US5202590 Subthreshold sense circuit for clamping an injected current |
| 04/06/1993 | US5200711 Pulse-width modulated, linear audio-power amplifier |
| 04/06/1993 | US5200709 Audio amplifying circuit |
| 04/06/1993 | US5200707 Amplifier with multiple switched stages and noise suppression |
| 04/06/1993 | US5200654 Trim correction circuit with temperature coefficient compensation |
| 04/01/1993 | WO1993006655A1 Active biasing control for class-ab cmos operational amplifiers |
| 04/01/1993 | CA2119357A1 Active biasing control for class-ab cmos operational amplifiers |
| 03/31/1993 | EP0534804A1 Class-D BICMOS hearing aid output amplifier |
| 03/31/1993 | EP0534007A1 Differential amplifier arrangement |
| 03/30/1993 | US5199079 Supply voltage responsive audible transient (POP) suppression arrangement |
| 03/30/1993 | US5198782 Low distortion amplifier output stage for dac |
| 03/25/1993 | DE4131782A1 Low-loss driver circuit for wideband power amplifier - uses opto-couplers between preamplifier and emitter-coupled drive stage followed by current-amplifying operational amplifier |
| 03/24/1993 | EP0532575A1 Apparatus for detecting failure of an antenna amplifier unit with a hot standby redundancy. |
| 03/24/1993 | EP0316405B1 Envelope amplifier |
| 03/23/1993 | US5196809 High gain, low distortion, faster switching transistor |
| 03/23/1993 | US5196808 RF amplifier protector and method |
| 03/23/1993 | US5196807 Amplifying circuit |
| 03/18/1993 | WO1993005570A1 High efficiency harmonic injection power amplifier |
| 03/17/1993 | EP0515662A4 Feed forward distortion minimization circuit |
| 03/16/1993 | US5194826 Circuitry arrangement for the elimination of spurious response in a radio telephone receiver |
| 03/16/1993 | US5194825 Protective circuit for the input transistor of a reception amplifier in nuclear magnetic resonance systems |
| 03/16/1993 | US5194823 Modulation means for an rf power amplifier |
| 03/16/1993 | US5194821 High efficiency power audio amplifiers comprising two amplifier with a single feed |