| 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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| 04/15/1998 | EP0836203A2 Amplifying unit comprising an input transformer capable of contributing to a wider frequency band of a broadband amplifier |
| 04/15/1998 | EP0835559A1 Non-linearity estimation method and device |
| 04/15/1998 | EP0835551A1 Output stage for buffering signals |
| 04/15/1998 | EP0835549A1 Methods and apparatus for modulating, demodulating and amplifying |
| 04/15/1998 | EP0716783B1 Amplifier stage with a db-linear output voltage |
| 04/15/1998 | EP0676100A4 Method and apparatus for controlling a peak envelope power of a power amplifier. |
| 04/15/1998 | EP0651906B1 Semiconductor-emulation of vacuum tubes |
| 04/14/1998 | US5740520 Channel correction transceiver |
| 04/14/1998 | US5740453 Apparatus for controlling noise signals |
| 04/14/1998 | US5739723 Linear power amplifier using active bias for high efficiency and method thereof |
| 04/14/1998 | US5739722 Low-voltage rail-to-rail operational amplifier |
| 04/14/1998 | US5739720 Switched capacitor offset suppression |
| 04/14/1998 | US5739719 Bias circuit with low sensitivity to threshold variations |
| 04/14/1998 | US5739712 Power amplifying circuit having an over-current protective function |
| 04/11/1998 | CA2187815A1 High frequency intensity amplifier circuitry arrangement for indoor cable television |
| 04/08/1998 | EP0834988A2 Method of automatic limiting of distortion in audio devices and circuit for carrying out the method |
| 04/08/1998 | EP0834217A1 Process for controlling the power of the transmission amplifier of radio equipment |
| 04/07/1998 | US5736902 High-gain common-emitter output stage |
| 04/07/1998 | US5736901 Radio frequency amplifier with stable operation and restrained oscillation at low frequencies |
| 04/07/1998 | US5736900 Method and apparatus for amplifying an electrical signal |
| 04/07/1998 | US5736899 Fully differential voltage controlled operational transconductance amplifier |
| 04/07/1998 | US5736898 Process and device for linearizing the gain charactristics and phase-frequency characteristics of traveling-wave tubes and transistor amplifiers at different power levels |
| 04/07/1998 | CA2152076C Apparatus and method for frequency compensating an operational amplifier |
| 04/07/1998 | CA2139714C Solid state tube compression circuit |
| 04/02/1998 | DE19639034A1 Integrated power driver voltage stabilisation device |
| 04/02/1998 | DE19638129A1 Output controlling method esp. for time-division multiplex transmitter |
| 04/01/1998 | EP0833442A1 High frequency noise and impedance matched integrated circuits |
| 04/01/1998 | EP0833441A1 Negative-feedback amplifier circuit capable of independently controlling a gain and an impedance |
| 04/01/1998 | EP0832515A1 A low-voltage rail-to-rail operational amplifier |
| 03/31/1998 | US5734725 Tube emulator amplifier system |
| 03/31/1998 | US5734366 Signal amplifier, signal amplifier circuit, signal line drive circuit and image display device |
| 03/31/1998 | US5734299 Microwave VCO having reduced supply voltage |
| 03/31/1998 | US5734298 FET amplifying circuit which can improve low-consumptive current |
| 03/31/1998 | US5734293 Fast current feedback amplifiers and current-to-voltage converters and methods maintaining high DC accuracy over temperature |
| 03/31/1998 | US5734287 Control of distortion in a line-powered amplifier with a rail-to-rail output voltage swing |
| 03/31/1998 | US5734261 Input protection circuit which includes optocoupler protection during over-voltage conditions |
| 03/26/1998 | WO1998012801A1 Three state output method and apparatus for high speed amplifiers |
| 03/26/1998 | WO1998012800A1 Adaptive digital predistortion linearization and feed-forward correction of rf power amplifier |
| 03/25/1998 | EP0831584A1 Amplifier system |
| 03/25/1998 | EP0667994B1 Method and arrangement for controlling the operation of a high-frequency power amplifier |
| 03/24/1998 | US5732333 Linear transmitter using predistortion |
| 03/24/1998 | US5732332 Transmitter having temperature-compensated detector |
| 03/24/1998 | US5732325 Waste energy control and management in power amplifiers |
| 03/24/1998 | US5731739 Class A operational amplifier with area efficient MOS capacitor frequency compensation |
| 03/24/1998 | US5731695 Voltage limiter circuit |
| 03/24/1998 | US5731536 Audio signal processing circuit for electric guitars for simulating the sound produced by the combination of an amplifier and microphone |
| 03/19/1998 | WO1998011665A1 Method and apparatus for detecting and compensating for undesired phase shift in a radio transceiver |
| 03/19/1998 | WO1998011664A1 High-efficiency amplifying device |
| 03/19/1998 | DE19637582A1 Verstärkeranordnung hohen Wirkungsgrades High efficiency amplifier arrangement |
| 03/18/1998 | EP0829955A1 Low noise amplifier structure |
| 03/18/1998 | EP0829954A1 Amplifier system |
| 03/18/1998 | EP0829796A1 Voltage controller with attenuated temperature sensitivity |
| 03/18/1998 | EP0829131A1 Minimum power-consumption amplifier |
| 03/18/1998 | CN1176712A Out-of-band compensation for non-linear device |
| 03/18/1998 | CN1176529A AGC voltage correction circuit |
| 03/18/1998 | CN1176528A Integrated circuit and method for generating transimpedance function |
| 03/18/1998 | CN1176465A Internal voltage generating circuit |
| 03/17/1998 | US5729611 Loudspeader overload protection |
| 03/17/1998 | US5729178 Fully differential folded cascode CMOS operational amplifier having adaptive biasing and common mode feedback circuits |
| 03/17/1998 | US5729177 Common mode rail-to-rail amplifier with a constant transconductance |
| 03/17/1998 | US5729176 Linear differential gain stage |
| 03/17/1998 | US5729174 Circuit arrangement for transmitting audio signals |
| 03/17/1998 | US5729171 For the processing of acoustical signals |
| 03/13/1998 | CA2214849A1 Low noise amplifier structure |
| 03/12/1998 | WO1998010513A1 Method and system for preventing an amplifier overload condition in a hybrid matrix amplifier array |
| 03/11/1998 | EP0828344A2 Integrated circuit and method for generating a transimpedance function |
| 03/11/1998 | EP0828297A2 Photosensor circuit |
| 03/11/1998 | EP0827649A1 Predistortion circuit for an analog signal in a video communication network |
| 03/11/1998 | EP0827642A1 A cartesian loop transmitter |
| 03/11/1998 | CN1175822A Electronic circuit for converting differential signal into single-ended signal by resistor network |
| 03/11/1998 | CN1175821A Silent start class D amplifier |
| 03/11/1998 | CN1175820A Inverted amplifying circuit |
| 03/11/1998 | CN1037734C RF amplifier bias control method and apparatus |
| 03/10/1998 | US5727069 Solid state musical instrument amplifier with vacuum tube signal magnitude limiting |
| 03/10/1998 | US5726604 Differential transconductor stage dynamically controlled by the input signal's amplitude |
| 03/10/1998 | US5726603 Linear RF power amplifier |
| 03/05/1998 | WO1998009372A1 Method of and apparatus for filtering intermodulation products in a radiocommunication system |
| 03/05/1998 | DE19634052A1 Controlling push=pull end stage with two transistors |
| 03/04/1998 | EP0332636B1 A signal-shaping network |
| 03/04/1998 | CN1175127A Device for stabilizing limiting frequency by using mutual conductance |
| 03/03/1998 | US5724519 For displaying an input video signal |
| 03/03/1998 | US5724218 Power transistor with short-circuit protection |
| 03/03/1998 | US5724095 Charge amplifier for MOS imaging array and method of making same |
| 03/03/1998 | US5724005 Linear power amplifier with automatic gate/base bias control for optimum efficiency |
| 03/03/1998 | US5724004 Voltage bias and temperature compensation circuit for radio frequency power amplifier |
| 02/25/1998 | EP0825710A1 Filter with amplifier |
| 02/25/1998 | EP0825709A1 Grounded-emitter amplifier circuit with an attenuator |
| 02/24/1998 | US5722056 Radio transmitter with power amplifier linearizer |
| 02/24/1998 | US5721784 Asymmetrical driver for asymmetrical loudspeakers |
| 02/24/1998 | US5721500 Efficient CMOS amplifier with increased transconductance |
| 02/24/1998 | CA2149050C Method and apparatus for controlling a peak envelope power of a power amplifier |
| 02/24/1998 | CA2145918C Feedforward amplifier with reduced distortion in wide band |
| 02/19/1998 | WO1998007294A1 High back emf, high pressure subwoofer |
| 02/19/1998 | WO1998007232A1 An amplifier and a method for detecting the presence of a load |
| 02/19/1998 | CA2263177A1 High back emf, high pressure subwoofer |
| 02/18/1998 | CN1173766A Idle current correcting circuit and low voltage drive type electronic appliance |
| 02/17/1998 | US5719529 Operational amplifier and digital signal transfer circuit |
| 02/17/1998 | US5719527 Method and apparatus for amplifying, modulating and demodulating |
| 02/17/1998 | US5719526 Internal load monitor for amplifier |
| 02/17/1998 | US5719428 High-frequency semiconductor device with protection device |