| Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008) |
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| 05/08/1991 | EP0426598A2 A transistor amplifier having variable bias circuits |
| 05/08/1991 | EP0426594A2 A temperature compensated feedback circuit for setting and stabilizing amplifier DC bias points |
| 05/08/1991 | EP0425745A1 Signal conditioner system for musical instruments |
| 05/07/1991 | US5014019 Amplifier circuit operable at low power source voltage |
| 05/07/1991 | US5014017 Power-saving low-frequency power amplifier |
| 05/07/1991 | US5014016 Switching amplifier |
| 05/02/1991 | EP0424394A1 Means for reducing damage to jfets from electrostatic discharge events. |
| 04/30/1991 | US5012384 Load circuit for a differential driver |
| 04/30/1991 | US5012254 Plural level beam-forming netowrk |
| 04/30/1991 | US5012203 Distributed amplifier with attenuation compensation |
| 04/30/1991 | US5012202 Low impedance automatic gain control circuit |
| 04/30/1991 | US5012200 Method and system for the linear amplification of signals |
| 04/30/1991 | US5012134 DC bootstrapped unity gain buffer |
| 04/30/1991 | CA1283713C Distributed push-pull amplifier |
| 04/25/1991 | DE3934814A1 Controlled ionisation tube for switches and amplifiers - has ions in solution in water and na and oh solution |
| 04/24/1991 | EP0424108A2 High frequency transmission line circuit |
| 04/23/1991 | US5010305 Microwave integrated circuit |
| 04/23/1991 | US5010304 Cryogenically-cooled radio-frequency power amplifier |
| 04/23/1991 | US5010303 Balanced integrated circuit differential amplifier |
| 04/23/1991 | US5010302 Charge amplifier circuit |
| 04/23/1991 | CA1283463C Switchable mode amplifier for wide dynamic range |
| 04/18/1991 | WO1991005404A2 Current mirror |
| 04/17/1991 | EP0422673A2 Photo-receiver |
| 04/17/1991 | EP0422554A1 Cascade assembly of transistors in parallel realised in hybrid circuit technology |
| 04/17/1991 | EP0422496A2 DC-coupled transimpedance amplifier |
| 04/17/1991 | CN2075402U Mini-amplifier for tv antenna signal |
| 04/16/1991 | US5008633 Cross-fed FET power-chip |
| 04/16/1991 | US5008632 Temperature compensated feedback circuit for setting and stabilizing amplifier DC bias points |
| 04/16/1991 | US5008526 Photodetector output coupling with low and high frequency outputs |
| 04/16/1991 | US5008524 Optical receiver with extended dynamic range |
| 04/16/1991 | CA1283178C Distributed amplifier circuits |
| 04/16/1991 | CA1283177C Bias circuit for fet |
| 04/16/1991 | CA1283171C Pulse width modulator for am-rf transmitter |
| 04/14/1991 | CA2027410A1 Photo-receiver |
| 04/10/1991 | EP0420974A1 Tunable resonance amplifier. |
| 04/09/1991 | US5006818 Linear differential amplifier |
| 04/09/1991 | US5006817 Rail-to-rail CMOS operational amplifier |
| 04/09/1991 | US5006816 Semiconductor integrated circuit including differential transistor circuit having a pair of FETs |
| 04/09/1991 | US5006815 Linear-gain amplifier arrangement |
| 04/09/1991 | US5006814 Current amplifier |
| 04/04/1991 | WO1991004576A1 Fet input circuit trimming |
| 04/03/1991 | EP0420739A1 Feeding device for a multiple beam antenna |
| 04/03/1991 | EP0420343A2 Electronic control circuit for audio-signal level |
| 04/03/1991 | EP0420183A2 Push-pull circuit |
| 04/03/1991 | EP0419819A1 Current mirror |
| 04/03/1991 | EP0183849B1 Control circuit that operates on pulse-width modulated signals |
| 04/03/1991 | CN1050475A Offset-volatage-balancing operational amplifier |
| 04/02/1991 | US5004986 Op-amp with internally generated bias and precision voltage reference using same |
| 04/02/1991 | US5004938 MOS analog NOR amplifier and current source therefor |
| 03/28/1991 | WO1991005405A1 Output amplifier |
| 03/27/1991 | EP0418899A2 Amplifier circuit |
| 03/27/1991 | EP0418753A1 Offset voltage compensated operational amplifier |
| 03/27/1991 | EP0418538A1 Improvements in or relating to balun transformers |
| 03/27/1991 | CN1012249B Uhf electronic switching device |
| 03/26/1991 | US5003504 FM modulator for an input impulse signal |
| 03/26/1991 | US5003271 RF power amplifier system having amplifier protection |
| 03/26/1991 | US5003269 Unity gain amplifier with high slew rate and high bandwidth |
| 03/20/1991 | EP0418025A2 Current mirror having large current scaling factor |
| 03/20/1991 | EP0417985A2 Amplitude stabilized inverting amplifier |
| 03/19/1991 | US5001439 Very low distortion amplifier |
| 03/19/1991 | CA2023396A1 Variable gain distributed amplifier |
| 03/13/1991 | EP0416703A2 Rapid-response differential amplifier with rail-to-rail input capability |
| 03/13/1991 | EP0293486B1 Amplifier having a constant-current bias circuit |
| 03/13/1991 | CN1049942A Manufacturing method of universally applicable and high-sensitive antenna amplifier |
| 03/12/1991 | US4999586 Wideband class AB CRT cathode driver |
| 03/12/1991 | US4999584 Signal-shaping network |
| 03/12/1991 | CA1281386C Accurate current conveyor |
| 03/07/1991 | WO1991003101A1 Darlington transistor circuit |
| 03/07/1991 | WO1991003100A1 Operational amplifier offset voltage compensation |
| 03/06/1991 | EP0415620A2 Electrical circuit |
| 03/06/1991 | EP0415080A2 Device for converting unbalanced analog electric signals into fully-differential signals |
| 03/06/1991 | EP0255826B1 Balanced differential load |
| 03/05/1991 | US4998074 Transistor circuit with base-current compensation |
| 03/05/1991 | US4998012 Fiber optic transimpedance receiver |
| 02/27/1991 | EP0414328A1 Differential amplifier with capacitive coupling |
| 02/26/1991 | US4996499 Amplitude stabilized oscillator amplifier |
| 02/26/1991 | US4996498 Common mode compensation for differential integrating filter |
| 02/21/1991 | WO1991002301A1 Electrical switching circuit |
| 02/21/1991 | DE3926888A1 Darlington-transistorschaltung Darlington transistor circuit |
| 02/20/1991 | EP0413643A1 Amplifier circuit with determined input impedance and with different transconductance values |
| 02/20/1991 | EP0413625A1 High efficiency amplifier |
| 02/20/1991 | CN2071850U Amplifier of domestic all-channel antenna for tv |
| 02/19/1991 | US4994891 Shielded transistor device |
| 02/19/1991 | US4994805 Delta sigma modulator arrangements compensated by chopper stabilization |
| 02/19/1991 | US4994761 VHF power amplifier |
| 02/19/1991 | US4994760 Apparatus and method for combining output signals from parallelly coupled power field effect transistors in high frequency amplifiers |
| 02/19/1991 | US4994755 Active balun |
| 02/19/1991 | US4994694 Complementary composite PNP transistor |
| 02/13/1991 | EP0412566A2 Integrable differential amplifier |
| 02/12/1991 | US4992757 Differential amplifying circuit |
| 02/12/1991 | US4992756 Low offset transconductance amplifier in an analog electronic cochlea |
| 02/12/1991 | US4992755 Transistor circuit |
| 02/12/1991 | US4992752 Method and apparatus for broadband impedance matching |
| 02/12/1991 | US4992751 Audio amplifier with phase modulated pulse width modulation |
| 02/12/1991 | US4992749 Pulse-width modulating amplifier circuit |
| 02/12/1991 | US4991916 Method and apparatus for automatically biasing a push-pull amplifier |
| 02/07/1991 | DE3925342A1 Class-AB amplifier with single cycle, or push-pull circuit - has FET with current sensing output, which is coupled to constant current source |
| 02/06/1991 | EP0411027A1 Amplifier circuit |
| 02/06/1991 | EP0410988A1 High-gain ic amplifier |
| 02/06/1991 | CN1049065A 电路 Circuit |