| Patents for H03F 1 - Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements (30,272) |
|---|
| 07/25/1990 | EP0378719A1 Digital distortion generator |
| 07/25/1990 | CN1044195A Power amplification circuit of large power tube without overloading |
| 07/24/1990 | US4944020 Temperature compensation circuit for negative impedance driving apparatus |
| 07/24/1990 | US4943783 Feed forward distortion correction circuit |
| 07/24/1990 | CA2008131A1 Adaptive predistortion circuit |
| 07/17/1990 | US4942367 Auto-zeroing switched-capacitance buffer amplifiers with minus-unity voltage gain |
| 07/17/1990 | CA2007635A1 Transistor circuit |
| 07/12/1990 | DE3900240A1 Amplifier circuit |
| 07/11/1990 | EP0377519A2 Modulation system capable of accurately compensating for nonlinearities of an amplifier connected thereto |
| 07/10/1990 | US4940949 High efficiency high isolation amplifier |
| 07/04/1990 | EP0376630A1 Fiber optic receiver and transceiver |
| 07/04/1990 | EP0376471A1 Low distortion current mirror |
| 07/04/1990 | CN2059034U 天线放大器 Antenna Amplifier |
| 07/03/1990 | US4939786 Adaptive thermal protection for a power amplifier by remote sense |
| 07/03/1990 | US4939516 Chopper stabilized delta-sigma analog-to-digital converter |
| 07/03/1990 | US4939479 Audio amplifier |
| 06/29/1990 | CA2006303A1 Fiber optic receiver and transceiver |
| 06/27/1990 | EP0374543A2 Wide bandwidth push-pull amplifier |
| 06/26/1990 | US4937874 Emulated guitar loudspeaker |
| 06/19/1990 | US4935796 Device for minimizing parasitic junction capacitances in an insulated collector vertical P-N-P transistor |
| 06/19/1990 | US4935705 High efficiency variable power amplifier |
| 06/19/1990 | US4935704 Low distortion linear amplifier with high-level output |
| 06/19/1990 | US4935703 Low bias, high slew rate operational amplifier |
| 06/19/1990 | US4935702 Subthreshold CMOS amplifier with offset adaptation |
| 06/19/1990 | US4934770 Electronic compression system |
| 06/14/1990 | WO1990006625A1 Service for phase correction induced by the class c operation of a 'solid state' amplifier and chain radar system using such device |
| 06/13/1990 | EP0373062A1 Control circuit for the rest potential of a charge, and differential comparator comprising such a control circuit |
| 06/13/1990 | EP0372705A2 RF amplifier bias circuit |
| 06/12/1990 | US4933648 Current mirror employing controlled bypass circuit |
| 06/12/1990 | US4933645 Amplifier having a constant-current bias circuit |
| 06/12/1990 | US4933643 Operational amplifier having improved digitally adjusted null offset |
| 06/12/1990 | US4933642 CMOS chopper-stabilized operational amplifier using two differential amplifier pairs as input stages |
| 06/12/1990 | US4933641 Extended dynamic range logarithmic if amplifying apparatus and method |
| 06/12/1990 | US4933626 Methods and apparatus for controlling power amplifiers driving highly inductive loads |
| 06/12/1990 | US4933578 Voltage follower circuit |
| 06/09/1990 | CA2004926A1 Circuit for the automatic control of the off-load voltage of a load, and differential comparator including this automatic control circuit |
| 06/07/1990 | DE3840854A1 Wide-band amplifier |
| 06/05/1990 | US4931745 Low noise chopper stabilized amplifier and method of operation |
| 06/05/1990 | US4931668 MIS transistor driven inverter circuit capable of individually controlling rising portion and falling portion of output waveform |
| 06/05/1990 | CA1270044A1 Feedforward gain block with mirror image error amplifier |
| 05/30/1990 | EP0370877A1 Correction device for phase displacement induced by the functioning of a "solid state" amplifier in class C, and radar chain using such a device |
| 05/30/1990 | EP0370608A1 Thermally stabilized optical preamplifier |
| 05/29/1990 | US4929910 Low current amplifier with controlled hysteresis |
| 05/29/1990 | US4929909 Differential amplifier with gain compensation |
| 05/29/1990 | US4929907 For high output swing in pulse generators |
| 05/29/1990 | US4929906 Amplifier linearization using down/up conversion |
| 05/25/1990 | CA2003721A1 Device for correcting the phase variations resulting from the class c operation of a solid state amplifier and radar network using such a device |
| 05/23/1990 | EP0369325A2 Amplifier circuit |
| 05/22/1990 | US4928073 DC amplifier |
| 05/22/1990 | CA1269421A1 Oscillation-free, short-circuit protection circuit |
| 05/16/1990 | EP0368528A2 Audio amplifier with mute and stand-by states |
| 05/16/1990 | EP0368510A1 Current amplifier |
| 05/16/1990 | EP0368379A1 Transistor circuit with base-current compensation |
| 05/16/1990 | EP0368329A2 Self equalizing multi-stage radio frequency power amplifier |
| 05/16/1990 | EP0367927A2 Sensor arrangement |
| 05/15/1990 | US4926139 Electronic frequency filter |
| 05/15/1990 | US4926136 Power amplifier combiner for improving linearity of an output |
| 05/15/1990 | US4926134 Gain monitoring of distortion cancellation amplifiers in a feedforward linear amplifier |
| 05/09/1990 | EP0367458A2 A predistortion compensated linear amplifier |
| 05/09/1990 | EP0367457A2 A feed forward linear amplifier |
| 05/09/1990 | EP0367330A1 Linear-gain amplifier arrangement |
| 05/08/1990 | US4924194 RF power amplifier |
| 05/08/1990 | US4924191 Amplifier having digital bias control apparatus |
| 05/08/1990 | CA1268826A1 Output amplifier |
| 05/02/1990 | EP0366253A1 Noise immune current mirror circuit |
| 05/01/1990 | US4922208 Output stage for an operational amplifier |
| 05/01/1990 | US4922131 Differential voltage threshold detector |
| 05/01/1990 | US4921814 Method of producing an MMIC |
| 04/25/1990 | EP0364930A2 Negative impedance driving apparatus having temperature compensation circuit |
| 04/24/1990 | US4920321 Amplifier circuit arrangement |
| 04/24/1990 | US4920309 Error amplifier for use with parallel operated autonomous current or voltage regulators using transconductance type power amplifiers |
| 04/24/1990 | US4920286 Method and circuitry for compensating for negative internal ground voltage glitches |
| 04/19/1990 | WO1990004284A1 Bias current compensation for bipolar input stages |
| 04/17/1990 | US4918564 Load driver with delayed turn-off |
| 04/17/1990 | US4918400 Amplifier circuit |
| 04/17/1990 | US4918394 Audio frequency power amplifier with improved circuit topology |
| 04/17/1990 | US4918370 Low voltage-controlled, stand-by electronic circuit with delayed switch off |
| 04/17/1990 | US4918338 Drain-biassed transresistance device for continuous time filters |
| 04/11/1990 | EP0362935A2 Drain-biassed transresistance device |
| 04/10/1990 | US4916408 Power stage with increased output dynamics |
| 04/10/1990 | US4916407 Gain variation compensating circuit for a feedforward linear amplifier |
| 04/04/1990 | EP0361608A1 Adaptive pre-distortion circuit |
| 03/28/1990 | EP0360178A2 Transmitter circuit for efficiently transmitting communication traffic via phase modulated carrier signals |
| 03/28/1990 | EP0134221B1 Tunable active filter |
| 03/27/1990 | US4912430 Current source as a microwave biasing element |
| 03/27/1990 | US4912429 Operational amplifier |
| 03/27/1990 | US4912427 Power supply noise rejection technique for amplifiers |
| 03/27/1990 | US4912426 Amplifier circuit |
| 03/27/1990 | US4912425 Operational amplifier circuit having stable operating point |
| 03/27/1990 | US4912424 Audio amplifier with voltage limiting |
| 03/27/1990 | US4912423 Chopper-stabilized operational transconductance amplifier |
| 03/27/1990 | US4912393 Voltage regulator with variable reference outputs for a hearing aid |
| 03/22/1990 | WO1990003034A1 Sample-hold amplifier circuit |
| 03/21/1990 | EP0359477A2 Linearization of an amplification in an RF amplifier |
| 03/21/1990 | CN1040719A Alternating current amplifier with digitally controlled frequency response |
| 03/20/1990 | US4910478 Amplifier circuit and method of controlling output power thereof |
| 03/20/1990 | US4910476 High-frequency amplifier with automatic neutrodyning circuit |
| 03/14/1990 | EP0358166A2 Power saving arrangement and power saving method |
| 03/13/1990 | US4908870 Motional load driver |
| 03/13/1990 | CA1266707A1 Method of calibrating and equalizing a multi-channel automatic gain control amplifier |