| 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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| 03/23/1982 | US4321648 Over-current protection circuits for power transistors |
| 03/23/1982 | US4321554 Time-delayed, variable output current limiting means for power amplifiers |
| 03/23/1982 | US4321553 Wide bandwidth low distortion amplifier |
| 03/23/1982 | US4321552 Amplifier comprising a first and a second amplifier element |
| 03/17/1982 | EP0047690A1 Monolithic ampliflier comprising a power dividing and combining system containing a plurality of transistors |
| 03/16/1982 | US4320447 Fail-safe amplifier power supply |
| 03/16/1982 | US4320353 Solid-state amplifier circuit for high-frequency signals |
| 03/16/1982 | US4320352 Input optimized FET bias circuit |
| 03/16/1982 | US4320350 Sliding power supply for RF power amplifier |
| 03/16/1982 | US4320349 Thermal coupler for amplifier temperature compensation |
| 03/10/1982 | EP0046878A2 Feedback amplifier or threshold switch for a current-fed differential stage |
| 03/09/1982 | US4319199 Efficient power amplifier with staggered power supply voltages |
| 03/09/1982 | US4319197 ECG Amplifier overload control |
| 03/09/1982 | US4319143 Impedance converting circuit |
| 03/09/1982 | CA1119679A1 Error-compensating amplification stage |
| 03/09/1982 | CA1119678A1 Wide-band transistorized amplifier |
| 03/02/1982 | US4318052 Wideband high voltage video amplifier |
| 02/23/1982 | US4317083 Bias adjustment responsive to signal power |
| 02/23/1982 | US4317081 Single-ended push-pull power amplifier having improved high frequency characteristics |
| 02/23/1982 | US4317055 High-voltage circuit for insulated gate field-effect transistor |
| 02/18/1982 | WO1982000536A1 Stage converter of electric signals |
| 02/16/1982 | US4316149 Power amplifier |
| 02/16/1982 | CA1118505A1 Distortion corrector for wide-band transistorized amplification stages |
| 02/10/1982 | EP0045691A2 Low output impedance stage for capacitive or direct coupling |
| 02/09/1982 | US4315223 CMOS Operational amplifier with improved frequency compensation |
| 02/09/1982 | US4315222 Power combiner arrangement for microwave amplifiers |
| 02/09/1982 | US4315221 Switching circuit |
| 02/02/1982 | US4314207 Transistor amplifier |
| 01/26/1982 | US4313145 Power output circuit |
| 01/26/1982 | US4313090 Car-mounted audio equipment |
| 01/26/1982 | CA1117188A1 Thermally responsive power control for a radio transmitter |
| 01/19/1982 | US4312060 Preamplifier for phonograph pickup |
| 01/19/1982 | US4311967 Compensation for transistor output resistance |
| 01/19/1982 | US4311966 Distributed amplifier for microwave frequencies |
| 01/13/1982 | EP0043707A1 Audio-frequency power amplifier |
| 01/13/1982 | EP0043699A1 Operational amplifier |
| 01/05/1982 | CA1115782A1 Fast-recovery circuit |
| 12/29/1981 | US4308504 Direct-coupled amplifier circuit with DC output offset regulation |
| 12/29/1981 | CA1115360A1 Pwm signal power amplifier |
| 12/29/1981 | CA1115347A1 Grounded rf power amplifier circuit apparatus |
| 12/23/1981 | EP0042319A1 Ultrafast linear hybrid amplifier |
| 12/23/1981 | EP0042305A2 MOS transistor circuit with breakdown protection |
| 12/23/1981 | EP0042014A1 Overvoltage protection circuit for line amplifiers |
| 12/22/1981 | US4307349 Impatt amplifiers |
| 12/16/1981 | EP0041566A1 Bandpass amplifier circuits |
| 12/15/1981 | US4306246 Method for trimming active semiconductor devices |
| 12/15/1981 | US4306200 Selective amplifier |
| 12/15/1981 | US4306199 Push-pull amplifier |
| 12/15/1981 | US4306196 Operational amplifier with offset compensation |
| 12/09/1981 | EP0041472A1 Circuit arrangement having an amplifier with output coupling transformer |
| 12/08/1981 | CA1114015A1 Apparatus for protecting power transistors in an h configuration power amplifier |
| 12/01/1981 | US4303891 Monolithic integrated circuit with frequency dependent amplification |
| 11/24/1981 | US4302727 Power amplifier having bias circuit with temperature compensation |
| 11/24/1981 | US4302719 Circuit for controlling a current source transistor |
| 11/18/1981 | EP0040127A1 Signal transmission device comprising a precorrection circuit for non-linear products |
| 11/17/1981 | US4301490 Electronic overload protection circuit |
| 11/17/1981 | US4301421 Direct-coupled amplifier with output offset regulation |
| 11/17/1981 | US4301420 Frequency characteristic-adjusting apparatus |
| 11/17/1981 | CA1112756A1 Overload protection circuit for video amplifiers |
| 11/10/1981 | US4300104 Automatic gain control circuit for a noise pulse canceller |
| 11/10/1981 | US4300103 Push-pull amplifier |
| 11/04/1981 | EP0039215A1 Temperature compensating voltage generator circuit |
| 11/04/1981 | EP0039076A1 Integrator circuit with sampling stage |
| 11/03/1981 | US4298843 Stabilized DC amplifier |
| 11/03/1981 | US4298811 MOS Voltage divider |
| 10/29/1981 | WO1981003094A1 Temperature compensating pressure sensor amplifier circuits |
| 10/28/1981 | EP0038440A2 Switching stage for controlling a tetrode |
| 10/27/1981 | US4297654 Crystal oscillator including a MOS-capacitor |
| 10/27/1981 | US4297643 Noise obviating electronic signal coupling means |
| 10/27/1981 | US4297642 Offset correction in operational amplifiers |
| 10/27/1981 | CA1111520A1 Electronic apparatus comprising an audio amplifier providing shunt voltage regulation |
| 10/27/1981 | CA1111518A1 Pulse width modulated signal amplifier |
| 10/20/1981 | US4296383 Balancing amplifier |
| 10/20/1981 | US4296382 Class AB push-pull FET amplifiers |
| 10/20/1981 | US4296381 Distortion reduction circuit for an inverting feedback amplifier |
| 10/13/1981 | US4295176 Semiconductor integrated circuit protection arrangement |
| 10/07/1981 | EP0037385A2 Apparatus for counteracting the cathode current increase occurring during warming-up in a travelling-wave tube in response to variation in the grid-cathode distance |
| 10/06/1981 | US4293819 High-speed low-drift operational amplifier |
| 10/01/1981 | WO1981002819A1 Analog integrated filter circuit |
| 09/29/1981 | US4292584 Constant current source |
| 09/22/1981 | US4291277 Adaptive predistortion technique for linearizing a power amplifier for digital data systems |
| 09/22/1981 | US4291276 Equalizer amplifier |
| 09/22/1981 | CA1109531A1 Low frequency power amplifier using mos fet's |
| 09/22/1981 | CA1109530A1 Commutating signal level translator |
| 09/15/1981 | US4290026 Power amplifier whose bias voltage changes depending on power supply voltage |
| 09/08/1981 | US4288829 Protective circuit on insulating substrate for protecting MOS integrated circuit |
| 09/08/1981 | US4288755 Protective circuit for a direct-coupled amplifier |
| 09/02/1981 | EP0034929A1 Protection of a MISFET of a semiconductor integrated circuit device |
| 09/01/1981 | US4287479 Operational amplifier circuit |
| 09/01/1981 | US4287478 Amplifier arrangement comprising two transistors |
| 09/01/1981 | US4287477 Feedback arrangement |
| 09/01/1981 | US4287390 Power amplifier apparatus having over-current protection function |
| 08/25/1981 | US4286236 RF Power amplifier with a modulating facility |
| 08/25/1981 | US4286227 Transistor amplifying circuit for preventing the operation of an amplifying transistor in the quasi-saturation region |
| 08/18/1981 | US4284960 Photo-feedback preamplifier circuit |
| 08/18/1981 | US4284959 Folded-cascode amplifier arrangement with cascode load means |
| 08/18/1981 | US4284958 Folded-cascode amplifier arrangement with current mirror amplifier |
| 08/18/1981 | US4284334 Circuit arrangement for the compensation of the temperature coefficient of semiconductor junctions |
| 08/11/1981 | US4283684 Non-linearity compensating circuit for high-frequency amplifiers |
| 08/11/1981 | US4283673 Means for reducing current-gain modulation due to differences in collector-base voltages on a transistor pair |