| 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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| 01/01/1980 | US4181895 Amplifier with muting circuit |
| 01/01/1980 | CA1069209A Video amplifier |
| 12/25/1979 | US4180782 Phantom full-bridge amplifier |
| 12/25/1979 | US4180781 Biasing and drive circuitry for quasi-linear transistor amplifiers |
| 12/25/1979 | US4180707 Distortion sound effects circuit |
| 12/25/1979 | CA1068781A Starting surge current protection circuit |
| 12/11/1979 | US4178559 Amplifier distortion reduction apparatus |
| 12/11/1979 | US4178557 Linear amplification with nonlinear devices |
| 12/11/1979 | US4178556 Class D amplifier system |
| 12/11/1979 | US4178555 Method of reducing distortion in electronic networks |
| 12/11/1979 | CA1068008A1 Mos input protection structure |
| 11/06/1979 | US4173739 Overload detecting circuit for a PWM amplifier |
| 10/23/1979 | US4172239 Signal attenuator |
| 10/02/1979 | US4169996 Operational amplifier with slew recovery enhancement |
| 09/11/1979 | US4167710 Pulse width modulated signal amplifier with protective means |
| 09/11/1979 | US4167708 Transistor amplifier |
| 09/04/1979 | US4167030 Protective circuit for an electronic switching amplifier in series with an electromagnet |
| 08/21/1979 | US4165493 Protected amplifier apparatus |
| 08/21/1979 | US4165478 Reference voltage source with temperature-stable MOSFET amplifier |
| 07/31/1979 | US4163198 Audio amplifier |
| 07/31/1979 | US4163197 Audio-frequency power amplifier |
| 07/31/1979 | US4163119 Protective circuit for electroacoustic transducer with hall element and voice coil temperature rise time constant circuit |
| 07/25/1979 | EP0003138A1 Wide band amplifier comprising an amplifying part and a feedback part |
| 07/10/1979 | CA1058225A1 Process for preparing glycol dimethyl ethers |
| 07/03/1979 | US4160216 Apparatus for eliminating on-off transitional gain variations in class ab, b and c active element amplifiers |
| 06/28/1979 | WO1979000362A1 Semiconductor power amplifier circuit |
| 06/27/1979 | EP0002640A1 Receiver input stage protected against noise signals and receiver using such a stage |
| 06/26/1979 | US4159489 Magnetic record reproducing system |
| 06/26/1979 | US4159449 Long-tailed-pair with linearization network |
| 06/19/1979 | US4158863 Input overload protection circuit |
| 06/19/1979 | US4158820 Low level preamplifier circuit |
| 06/12/1979 | US4158179 Amplifier circuit |
| 06/12/1979 | US4158178 Anti-latch circuit for amplifier stage including bipolar and field-effect transistors |
| 06/05/1979 | US4157513 Protective system for power stage of monolithic circuitry |
| 05/31/1979 | WO1979000295A1 Current sources |
| 05/29/1979 | CA1055576A1 Operational amplifier |
| 05/22/1979 | US4156283 Multiplier circuit |
| 05/22/1979 | US4156173 Input impedance matching of a bipolar transistor employing a coaxial transformer |
| 05/15/1979 | US4155004 Photoelectric transducing unit and system for detecting the sharpness of the image of object by means of the unit -and- a focusing arrangement |
| 05/08/1979 | US4153835 Temperature compensation circuit |
| 05/01/1979 | US4152716 Voltage dividing circuit in IC structure |
| 05/01/1979 | US4152668 Protection circuit for amplifier circuits |
| 05/01/1979 | US4152665 Amplifier linearity compensation apparatus |
| 05/01/1979 | US4152599 Method for positioning a workpiece relative to a scanning field or a mask in a charged-particle beam apparatus |
| 04/24/1979 | US4151484 Radiation-hardened transistor amplifiers |
| 04/24/1979 | US4151482 Folded-cascode amplifier stages |
| 04/24/1979 | US4151480 FET Amplifier with protective circuit |
| 04/24/1979 | US4151479 Low frequency power amplifier using MOS FET's |
| 04/24/1979 | US4151425 Voltage sequencing circuit for sequencing voltages to an electrical device |
| 04/24/1979 | CA1053366A1 Television display apparatus having a video amplifier |
| 04/17/1979 | USRE29971 Field effect semiconductor device having an unsaturated triode vacuum tube characteristic |
| 04/17/1979 | US4150339 Temperature insensitive DC voltage detection and protection circuit |
| 04/17/1979 | US4150253 Signal distortion circuit and method of use |
| 04/10/1979 | US4149124 Thermal protection of amplifiers |
| 04/03/1979 | US4147990 Fast-recovery circuit |
| 03/27/1979 | US4146847 Power limiting circuitry for use with power amplifier |
| 03/27/1979 | US4146846 Amplifier having a high frequency boost network |
| 03/27/1979 | US4146844 Feed-forward amplifier |
| 03/27/1979 | US4146801 Apparatus for protecting power transistors in an h configuration power amplifier |
| 03/20/1979 | US4145666 Multistage amplifier circuit |
| 03/13/1979 | US4144502 Negative feedback amplifiers of PWM-type |
| 02/20/1979 | US4140976 Thermally stable push-pull amplifier |
| 02/20/1979 | US4140960 Current control circuit |
| 02/20/1979 | US4139935 Over voltage protective device and circuits for insulated gate transistors |
| 02/20/1979 | CA1049106A1 Bias circuit for fet |
| 02/13/1979 | USRE29910 Current mirror amplifier |
| 02/08/1979 | WO1979000050A1 An improved interferometric amplifier |
| 02/06/1979 | US4138649 Amplifier system |
| 02/06/1979 | CA1048125A1 Sensing circuit with a four terminal insulated gate semi-conductor device |
| 02/06/1979 | CA1048114A1 Amplifier arrangement linearised by automatic correction |
| 01/30/1979 | US4137506 Compound transistor circuitry |
| 01/16/1979 | CA1046596A1 Transistor amplifier |
| 01/09/1979 | US4134140 Voltage mode amplifier for use with a high Q magnetic head |
| 01/09/1979 | CA1046143A1 Electronic circuit using field effect transistor with compensation means |
| 01/02/1979 | US4132958 Feedbeside correction circuit for an amplifier |
| 12/26/1978 | US4131908 Semiconductor protection device having a bipolar lateral transistor |
| 12/26/1978 | US4131860 Power amplifier arrangement automatically matched to service conditions |
| 12/26/1978 | US4131859 Method of compensation of intermodulation noise and devices for the implementing thereof |
| 12/19/1978 | US4130807 Feedforward amplifiers |
| 12/12/1978 | CA1044336A1 Amplifier |
| 12/12/1978 | CA1044335A1 Complementary symmetry amplifier |
| 11/28/1978 | US4127743 Muting circuit for loudspeaker |
| 11/21/1978 | USRE29844 Unit transistor amplifier with matched input and output impedances |
| 11/21/1978 | US4126830 Low leakage gate protection circuit |
| 11/21/1978 | CA1042995A1 Transistor amplifier having field effect transistors with stabilized drain bias current |
| 11/14/1978 | CA1042531A1 Temperature sensitive control circuit |
| 11/07/1978 | CA1042079A1 Linear amplifier utilizing transistor switching |
| 11/07/1978 | CA1042078A1 Transistor amplifier |
| 11/07/1978 | CA1042070A1 Transistor protective circuit with imminent failure sensing |
| 10/31/1978 | US4123723 Transistor amplifier circuit |
| 10/31/1978 | US4123721 Bias current compensated operational amplifier circuit |
| 10/31/1978 | CA1041616A1 Transistor amplifier |
| 10/24/1978 | US4122403 Temperature stabilized common emitter amplifier |
| 10/24/1978 | US4122401 High efficiency power amplifier circuit |
| 10/24/1978 | US4122400 Amplifier protection circuit |
| 10/24/1978 | US4122399 Distortion generator |
| 10/24/1978 | CA1041184A1 Power amplifier using a plurality of parallel connected amplifier elements and having burn-out protection |
| 10/17/1978 | US4121169 Amplifier device |
| 10/17/1978 | US4121168 Optically coupled bias circuit for complementary output circuit and method |
| 10/17/1978 | CA1040721A1 Dual feedback amplifier |