| Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008) |
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| 02/05/1991 | US4990973 Method of producing an MMIC and the integrated circuit produced thereby |
| 02/05/1991 | US4990864 Current amplifier circuit |
| 02/05/1991 | US4990863 Amplifier output stage |
| 02/05/1991 | CA1279907C Bidirectional buffer amplifier |
| 01/30/1991 | EP0410595A2 Trimming circuits |
| 01/30/1991 | EP0410536A2 Combined current differencing and operational amplifier circuit |
| 01/30/1991 | EP0410399A2 Video preamplifier circuit |
| 01/30/1991 | EP0410295A2 Single-ended chopper stabilized operational amplifier |
| 01/30/1991 | EP0409844A1 Amplifier arrangement and communication line circuit using same. |
| 01/29/1991 | US4988954 Low power output stage circuitry in an amplifier |
| 01/24/1991 | DE3744782C2 Chain amplifier with FETs - has capacitor and earthing impedance in parallel between FET source terminals and earth |
| 01/23/1991 | EP0409476A2 Low impedance buffer circuitry |
| 01/23/1991 | EP0409448A2 Operational amplifier having selectable inputs |
| 01/23/1991 | EP0144344B1 Ringing signal generator |
| 01/22/1991 | US4987385 High efficiency power amplifier |
| 01/22/1991 | US4987384 High frequency amplifier |
| 01/22/1991 | US4987382 Microwave integrated circuit having a level shift circuit |
| 01/22/1991 | US4987381 Tube sound solid-state amplifier |
| 01/22/1991 | US4987379 Operational amplifier circuit |
| 01/22/1991 | US4987377 Field emitter array integrated distributed amplifiers |
| 01/22/1991 | US4987327 Apparatus for adjusting DC offset voltage |
| 01/22/1991 | US4987320 Multiphase multiplier |
| 01/16/1991 | EP0408137A1 Amplifier arrangement |
| 01/16/1991 | EP0407859A1 High speed auto zero comparator |
| 01/16/1991 | EP0407778A2 Hybrid amplifier |
| 01/15/1991 | US4985642 High-frequency circuit having a loaded field-effect transistor |
| 01/10/1991 | DE3920802A1 Push=pull amplifier circuit with rest current stabilisation - generates reference signal using control current and control signal derived from amplifier output currents |
| 01/09/1991 | EP0406967A1 Amplifier arrangement |
| 01/09/1991 | EP0406964A1 Amplifier arrangement |
| 01/08/1991 | US4984079 Video preamplifier circuit |
| 01/08/1991 | US4983930 Current conveyor |
| 01/08/1991 | US4983929 Cascode current mirror |
| 01/08/1991 | US4983926 Null offset voltage compensation for operational amplifiers |
| 01/08/1991 | CA1278831C Line receiver |
| 01/02/1991 | EP0405056A2 Output amplifier for the final distribution of television programs |
| 01/01/1991 | US4982317 Integrated voltage multiplier circuit for low supply voltage |
| 12/27/1990 | EP0404697A1 Wide band amplifier with constant gain and high frequency selected input impedance |
| 12/27/1990 | EP0404403A2 Very low distortion amplifier |
| 12/27/1990 | EP0404360A2 Shielded transistor device |
| 12/27/1990 | EP0404137A2 Biomode balanced amplifier |
| 12/27/1990 | CA1278368C Method and device for improving the sensitivity and the signal-to-noise ratio and piezoelectric transducers comprising a mulitiplicity of parallel mounted sensors |
| 12/25/1990 | US4980920 Negative impedance driving apparatus having temperature compensation circuit |
| 12/25/1990 | US4980651 High speed, high precision operational amplifier |
| 12/25/1990 | US4980650 Current amplifier |
| 12/25/1990 | US4980649 Ultra efficient switching power amplifier |
| 12/20/1990 | DE3920803C1 Push=pull amplifier with two output stages - has input difference stage and current or power source for setting closed circuit current and no-load amplification |
| 12/19/1990 | EP0403195A1 Current mirror circuit |
| 12/19/1990 | EP0403174A2 Differential amplifying circuit operable at high speed |
| 12/19/1990 | EP0402383A1 Mos current mirror with high output impedance and compliance |
| 12/18/1990 | US4978959 Analog to digital converter, a digital to analog converter and an operational amplifier therefor |
| 12/18/1990 | US4978925 Unity-gain CMOS/SOS zero-offset buffer |
| 12/18/1990 | US4978924 Linear switch with high off-state isolation |
| 12/13/1990 | DE4018617A1 Frequency converter for quadrature modulator or demodulator |
| 12/13/1990 | DE4018616A1 Frequency converter for quadrature modulator or demodulator - using heterodyne signal generator providing quadrature signals with 90 degree phase-shift |
| 12/12/1990 | EP0402044A2 Optical receivers |
| 12/12/1990 | EP0401869A1 Enhanced-aaccuracy semiconductor power amplifier |
| 12/12/1990 | EP0401632A2 Method and apparatus for broadband impedance matching |
| 12/11/1990 | US4977378 Rapid-response differential amplifier with rail-to-rail input capability |
| 12/05/1990 | EP0401013A2 High frequency amplifier circuit capable of optimizing a total power consumption |
| 12/05/1990 | EP0400819A2 Low bias, high slew rate operational amplifier |
| 12/05/1990 | EP0400650A2 Linearized differential amplifier |
| 12/04/1990 | US4975659 Amplifier package using vertical power transistors with ungrounded common terminals |
| 12/04/1990 | US4975658 High frequency amplifier circuit with noise figure improvement |
| 11/28/1990 | CN1047426A Amplifier arrangement |
| 11/27/1990 | US4973919 Amplifying with directly coupled, cascaded amplifiers |
| 11/27/1990 | US4973918 Distributed amplifying switch/r.f. signal splitter |
| 11/27/1990 | US4973917 Output amplifier |
| 11/27/1990 | US4973890 Cascode mirror video amplifier |
| 11/27/1990 | US4973857 Current divider circuit |
| 11/22/1990 | EP0398065A2 Monolithically integratable differential operational amplifier |
| 11/20/1990 | US4972237 Metal-semiconductor field effect transistor device |
| 11/20/1990 | US4972159 Amplifier circuit more immune to fluctuation of reference voltage |
| 11/20/1990 | US4972158 Transistor amplifier with variable bias circuits |
| 11/20/1990 | US4972157 Operational amplifier having selectable inputs |
| 11/20/1990 | US4972100 Data output buffer circuit for byte-wide memory |
| 11/20/1990 | CA1276694C Operational amplifier |
| 11/20/1990 | CA1276691C Ecl-compatible input-output circuits in cmos technology |
| 11/14/1990 | EP0397265A1 Bipolar transistor arrangement with distortion compensation |
| 11/14/1990 | EP0397250A2 D.C. blocking amplifier |
| 11/14/1990 | EP0397240A1 Amplifier arrangement |
| 11/13/1990 | US4970471 Gallium arsenide class AB output stage |
| 11/13/1990 | US4970470 DC-coupled transimpedance amplifier |
| 11/07/1990 | EP0396430A2 Radio frequency network |
| 11/07/1990 | EP0396261A2 High-Gain sense amplifiers array for high-speed read operation |
| 11/07/1990 | EP0395894A2 Electronic circuit for analog multiplication, differential amplification or charge accumulation |
| 11/07/1990 | EP0395850A2 Amplifier with digital gain control |
| 11/06/1990 | US4968949 Ohmically isolating input circuit |
| 11/06/1990 | US4968948 Pulse width modulation amplifier circuit |
| 11/05/1990 | CA2015945A1 Radio frequency network |
| 11/01/1990 | WO1990013175A1 Tunable resonance amplifier |
| 11/01/1990 | WO1990013172A1 Control circuit |
| 10/31/1990 | EP0394807A2 Voltage buffer stage with temperature-independent output |
| 10/31/1990 | EP0394703A2 A circuit arrangement for enhancing the transconductance of a differential amplifier stage comprising MOS transistors |
| 10/31/1990 | EP0394702A2 A circuit arrangement for increasing the band-gain product of a cmos amplifier |
| 10/31/1990 | EP0220403B1 Series network arrangement adjustable in stages |
| 10/31/1990 | DE4003462A1 Power amplifier with negligible phase twist - uses control for second controllable current source, between positive voltage source and amplifier output, adjustment |
| 10/31/1990 | DE4003460A1 Power amplifier with negligible phase twist - has differential amplifier replaced by device with two outputs, first one controlling current source |
| 10/31/1990 | CN1046633A Regulating circuit |
| 10/30/1990 | US4967162 Stripline traveling wave device and method |
| 10/30/1990 | US4967140 Current-source arrangement |