| Patents for H03F 1 - Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements (30,272) |
|---|
| 10/17/1978 | CA1040720A1 Transistor amplifier with protective circuit |
| 10/17/1978 | CA1040719A1 Distortion correction circuit |
| 10/10/1978 | US4119923 Distortion corrector for wide-band transistorized amplification stages |
| 10/10/1978 | US4119921 Amplifier device for transmitting tetrode |
| 10/10/1978 | CA1040279A1 Transistor amplifier |
| 10/03/1978 | US4118731 Video amplifier with suppressed radio frequency radiation |
| 10/03/1978 | US4118600 Loudspeaker lower bass response using negative resistance and impedance loading |
| 09/26/1978 | US4117418 Electric amplifier |
| 09/26/1978 | US4117412 Phonograph preamplifier network with infrasonic cutoff response |
| 09/26/1978 | CA1039368A1 Parallel-connection of semiconductor systems |
| 09/19/1978 | US4115742 Variable load line power amplifier |
| 09/19/1978 | US4115739 Power amplifier |
| 09/12/1978 | US4114108 Overdrive protection circuit |
| 09/12/1978 | CA1038456A1 Amplifier protection circuit |
| 09/05/1978 | US4112387 Bias circuit |
| 09/05/1978 | US4112386 Modular radio frequency amplifier having a gain variable by external passive component selection |
| 09/05/1978 | US4112385 Sound amplifier circuit |
| 09/05/1978 | CA1038032A1 Protective circuit |
| 08/29/1978 | US4110559 Loud-speaker output circuit |
| 08/22/1978 | US4109212 Complementary distortion circuit |
| 08/15/1978 | US4107620 Regulated power supply with auto-transformer output and direct current feedback |
| 08/15/1978 | US4107619 Constant voltage - constant current high fidelity amplifier |
| 08/08/1978 | US4105945 Active load circuits |
| 08/08/1978 | US4105943 Integrated amplifier with negative feedback |
| 07/25/1978 | US4103245 Transistor amplifier for low level signal |
| 07/25/1978 | US4103181 Monolithic integrated transistor and protective circuit therefor |
| 07/11/1978 | US4100561 Protective circuit for MOS devices |
| 07/11/1978 | US4100501 Audio frequency power amplifier |
| 07/11/1978 | US4100438 Compound transistor circuitry |
| 07/04/1978 | US4099139 Power amplifier circuit |
| 07/04/1978 | US4099136 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 |
| 06/20/1978 | US4096517 Video amplifier |
| 06/06/1978 | US4093822 Loudspeaker protection circuit |
| 05/30/1978 | US4092693 Temperature sensing protection circuit for ic power chip having thermal hysteresis characteristic |
| 05/30/1978 | US4092692 Overload protection circuit |
| 05/30/1978 | US4092616 Traveling wave power combining apparatus |
| 05/30/1978 | US4092613 Transistorized class ab power amplifier and its bias circuit |
| 05/30/1978 | US4092609 Circuit for reducing ripple voltage |
| 05/23/1978 | US4091434 Surge current protection circuit |
| 05/23/1978 | US4091430 Guard circuit for high impedance signal circuits |
| 05/16/1978 | US4090149 Integrated degenerative amplifier |
| 05/16/1978 | US4090148 Circuit pattern for a protection circuit of a stereo amplifier |
| 05/16/1978 | US4090147 Interferometric amplifier |
| 05/09/1978 | US4088961 Operational amplifier driver circuit |
| 05/02/1978 | US4087761 Audio power amplifier |
| 05/02/1978 | US4087760 Transistor amplifier circuit |
| 05/02/1978 | US4087759 Power amplifier devices |
| 04/25/1978 | US4086642 Protective circuit and device for metal-oxide-semiconductor field effect transistor and method for fabricating the device |
| 04/18/1978 | US4085383 Matrix selection amplifier circuit for low impedance heads in a magnetic disc memory device |
| 04/18/1978 | US4085380 Biquad RC active filter |
| 03/28/1978 | US4081759 Output signal correcting circuit |
| 03/14/1978 | US4079337 Wide bandwidth feedback amplifier |
| 03/14/1978 | US4079331 Amplifier system with special feedback circuits |
| 03/07/1978 | US4078207 Push-pull transistor amplifier with driver circuitry providing over-current protection |
| 03/07/1978 | US4078156 Drift cancellation circuit for multiplexer amplifier |
| 02/28/1978 | US4077013 Audio power amplifier with automatic bias control |
| 02/28/1978 | US4077012 Amplifier devices |
| 02/28/1978 | US4076204 Retaining clip |
| 02/21/1978 | US4075574 Wideband differential amplifier |
| 02/14/1978 | US4074334 Protective device for a power element of an integrated circuit |
| 02/14/1978 | US4074206 Linear output amplifier for charge-coupled devices |
| 02/14/1978 | US4074204 Equalizing amplifier |
| 02/07/1978 | US4072908 Audio amplifier with constant current consumption |
| 01/17/1978 | US4069461 Amplifier circuit having two negative feedback circuits |
| 01/17/1978 | US4069459 Feedback capacitor divider |
| 01/17/1978 | US4069430 MIS switching circuit capable of enduring high voltage |
| 01/10/1978 | US4068278 Overload protection circuit for amplifiers |
| 01/10/1978 | US4068186 Circuit for compensating for nonlinear characteristics in high-frequency amplifiers |
| 01/10/1978 | US4068183 Transistorized single ended push-pull amplifier having no cross-over distortion |
| 01/10/1978 | US4068182 Direct-coupled cascade amplifier with automatically adjusted quiescent output signal level |
| 01/03/1978 | US4066975 Audio amplifier with improved stability |
| 12/27/1977 | US4065726 Negative feedback amplifier and lever shifter |
| 12/27/1977 | US4065725 Gain control circuit |
| 12/20/1977 | US4064364 Audio fidelity amplifier and preamplifier systems |
| 12/13/1977 | US4063185 Direct coupling type power amplifier circuit |
| 12/13/1977 | US4063050 Acoustic transducer with improved electret assembly |
| 12/06/1977 | US4061984 Transistor power amplifier for transmitting systems |
| 12/06/1977 | US4061983 Transistor amplifier with protective circuit |
| 12/06/1977 | US4061928 Circuit arrangement for the protection of inputs of integrated MOS circuits |
| 11/22/1977 | US4059811 Integrated circuit amplifier |
| 11/22/1977 | US4059807 Pulse width modulated amplifier |
| 11/15/1977 | US4058775 Over-current prevention circuitry for transistor amplifiers |
| 11/08/1977 | US4057844 MOS input protection structure |
| 11/08/1977 | US4057767 Device for protecting an audio amplifier against overload or short circuit |
| 11/08/1977 | US4057764 Amplifier |
| 10/25/1977 | US4055811 Transistor amplifiers |
| 10/18/1977 | US4054845 Transient and thermal protection |
| 10/18/1977 | US4054843 Amplifier with modulated power supply voltage |
| 10/18/1977 | US4053996 Power amplifier protection circuit |
| 09/27/1977 | US4051443 Differential amplifier |
| 09/20/1977 | US4050031 Circuit and structure having high input impedance and DC return |
| 09/20/1977 | US4050029 Electronic apparatus comprising an audio amplifier providing shunt voltage regulation |
| 09/20/1977 | US4049960 Focusing arrangement |
| 09/13/1977 | US4048579 Feed-forward amplifier |
| 09/13/1977 | US4048574 Method and a device for eliminating the residual error voltage of an amplifier |
| 09/06/1977 | US4047122 Frequency compensated differential amplifier |
| 09/06/1977 | US4047119 Transistor differential amplifier circuit |
| 09/06/1977 | US4047118 Transistor amplifier circuit |
| 08/30/1977 | US4045745 Low-frequency power amplifier |
| 08/30/1977 | US4045744 Low-frequency power amplifier |