| Patents for H03F 1 - Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements (30,272) |
|---|
| 12/09/1980 | CA1091163A1 Sound processing method and apparatus |
| 12/09/1980 | CA1091162A1 Temperature insensitive dc voltage detection and protection circuit |
| 12/02/1980 | US4237426 Transistor amplifier |
| 12/02/1980 | US4237425 Automatic bias adjusting circuit |
| 11/27/1980 | WO1980002625A1 Generator of electric oscillations |
| 11/26/1980 | EP0019084A1 Circuitry for reducing amplitude-dependent distortions in heterodyne receivers |
| 11/25/1980 | US4236120 High speed, high efficiency amplifier circuit |
| 11/25/1980 | US4236119 Monolithic wideband amplifier |
| 11/18/1980 | CA1089980A1 Feedback amplifier |
| 11/13/1980 | WO1980002484A1 Feedback arrangement |
| 11/11/1980 | US4233566 Distortion free power limiting and clipping prevention circuit |
| 11/04/1980 | US4232273 PNP Output short circuit protection |
| 11/04/1980 | US4232270 High gain differential amplifier with positive feedback |
| 11/04/1980 | CA1089035A1 Push-pull transistor amplifier |
| 10/28/1980 | US4230980 Bias circuit |
| 10/21/1980 | US4229706 Audio amplifier |
| 10/21/1980 | US4229703 Zero reference and offset compensation circuit |
| 10/14/1980 | US4228067 UV Light stabilized polycarbonate composition |
| 10/14/1980 | CA1087696A1 Signal amplifier apparatus with fail-safe limited gain |
| 10/14/1980 | CA1087694A1 Output signal correcting circuit |
| 10/07/1980 | US4227227 Protective circuit for a power amplifier |
| 10/07/1980 | US4227157 Frequency compensated high frequency amplifiers |
| 10/07/1980 | US4227155 Amplifier with dark current compensation |
| 10/07/1980 | US4227095 Deviation driver circuit |
| 09/30/1980 | US4225897 Overcurrent protection circuit for power transistor |
| 09/30/1980 | US4225827 Stabilization circuit for transistor RF power amplifiers |
| 09/30/1980 | CA1086836A1 Rf amplifier |
| 09/18/1980 | WO1980001975A1 Gain control circuit |
| 09/16/1980 | US4223273 Power amplifying device for driving loudspeakers |
| 09/16/1980 | CA1085741A1 Muting circuit for loudspeaker |
| 09/09/1980 | US4222012 Amplifier device |
| 09/09/1980 | CA1085471A1 Audio frequency power amplifier |
| 09/04/1980 | WO1980001862A1 Feedback arrangement |
| 09/02/1980 | US4220932 Buffer amplifier |
| 09/02/1980 | CA1085004A1 Amplifier with muting circuit |
| 08/19/1980 | US4218660 Audio amplifier and method of operating the same |
| 08/19/1980 | US4218659 Amplifier circuit for a hall-effect head |
| 08/19/1980 | US4218613 Amplifier for electric signals |
| 08/19/1980 | US4218140 Light meter |
| 08/12/1980 | US4217556 Output amplifying circuit |
| 08/12/1980 | US4217555 Amplifier circuit arrangement with stabilized power-supply current |
| 08/12/1980 | CA1083490A1 Loudspeaker |
| 08/06/1980 | EP0014095A1 PNP output short circuit protection |
| 08/05/1980 | US4216517 Protection circuit for power amplifier |
| 08/05/1980 | US4216437 Protective circuitry for push-pull amplifiers |
| 08/05/1980 | US4216394 Leakage current compensation circuit |
| 07/29/1980 | US4215318 Push-pull amplifier |
| 07/24/1980 | WO1980001527A1 Field effect transconductance amplifiers |
| 07/22/1980 | US4214252 Semiconductor device having a MOS-capacitor |
| 07/22/1980 | US4214214 Connecting cable |
| 07/15/1980 | US4213140 Insulated-gate semiconductor device |
| 07/15/1980 | US4213083 Circuit arrangement for compensating transmission errors of a transformer |
| 07/15/1980 | CA1081805A1 Matrix selection amplifier circuit for low impedance heads in a magnetic disc memory device |
| 07/08/1980 | US4211941 Integrated circuitry including low-leakage capacitance |
| 07/08/1980 | US4211939 Operational amplifier with switching error elimination |
| 07/08/1980 | US4211893 Dual mode music instrument amplifier |
| 07/01/1980 | US4210873 Gain and impedance switching circuit for an amplifier |
| 06/24/1980 | CA1080311A1 Semiconductor biasing circuit |
| 06/24/1980 | CA1080126A1 Protective circuit for electroacoustic transducer |
| 06/17/1980 | CA1079804A1 Voltage sequencing circuit for sequencing voltage to an electrical device |
| 06/12/1980 | WO1980001227A1 Selective amplifier |
| 06/11/1980 | EP0012093A1 Distributed microwave amplifier and amplifying device comprising such an amplifier |
| 06/10/1980 | US4207538 Temperature compensation circuit |
| 06/10/1980 | US4207480 D.C. Amplifier with improved characteristics with respect to temperature |
| 06/10/1980 | US4207475 Efficient bipolar regulated power supply |
| 06/03/1980 | US4206419 Power amplifier |
| 05/28/1980 | EP0011446A1 A frequency characteristic-adjusting circuit |
| 05/27/1980 | US4205276 Audio amplifier with low AM radiation |
| 05/27/1980 | US4205274 Power amplifier circuit |
| 05/27/1980 | CA1078468A1 Amplifier circuit for high frequency signals, particularly for cable distribution systems, comprising at least a first transistor controlled at its base electrode by a signal source, and a difference amplifier |
| 05/20/1980 | CA1078072A1 Semiconductor device having a safety circuit |
| 05/15/1980 | WO1980001023A1 High efficiency,light weight audio amplifier and power supply |
| 05/13/1980 | CA1077581A1 Class b amplifier |
| 05/13/1980 | CA1077580A1 Low-frequency power amplifier |
| 05/06/1980 | CA1077143A1 Amplifier with modulated power supply voltage |
| 04/22/1980 | US4199797 Protective circuit for amplifier circuits |
| 04/22/1980 | US4199732 Amplifying circuit |
| 04/22/1980 | US4199730 Double peaked amplifier |
| 04/16/1980 | EP0010023A1 High performance amplitude modulation transmission system and television transmitter and retransmitter comprising such a system |
| 04/16/1980 | EP0009811A1 Line amplifier with a circuit for the coarse protection of input and output against overvoltage |
| 04/15/1980 | US4198610 Audio amplifier |
| 04/08/1980 | US4197558 Overload protection circuit for video amplifiers |
| 04/08/1980 | US4197511 Linear load MOS transistor circuit |
| 04/01/1980 | US4196392 Method and apparatus for monitoring and controlling the anode dissipation of transmitters |
| 03/25/1980 | US4195267 Low-level preamplifier circuit |
| 03/25/1980 | US4195266 Commutating signal level translator |
| 03/18/1980 | US4194165 Miniature guitar amplifier |
| 03/18/1980 | CA1073973A1 Current control circuit |
| 02/26/1980 | US4190805 Commutating autozero amplifier |
| 02/12/1980 | US4188551 Amplifier circuit having photoelectric converter |
| 02/06/1980 | EP0007781A1 Method and apparatus for controlling the current supplied to a load |
| 02/05/1980 | US4187472 Amplifier employing matched transistors to provide linear current feedback |
| 02/05/1980 | US4187467 Grounded RF power amplifier circuit apparatus |
| 01/22/1980 | US4185249 Bipolar signal to current converter |
| 01/15/1980 | US4184187 Unbalanced DC voltage detecting circuit |
| 01/15/1980 | US4184176 Amplifier having different low-frequency and high-frequency feedback networks |
| 01/09/1980 | EP0006785A1 Cathode heating device for electron power tube and emitter including such a device |
| 01/08/1980 | US4183020 Amplifier with field effect and bipolar transistors |
| 01/08/1980 | US4182962 Semiconductor temperature compensation circuit |
| 01/08/1980 | CA1069594A1 Wide-band transistor amplifier |