| Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008) |
|---|
| 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 | USRE30297 Current amplifier |
| 06/03/1980 | US4206419 Power amplifier |
| 06/03/1980 | US4206418 Circuit for limiting voltage differential in differential amplifiers |
| 06/03/1980 | US4206417 Sound system control |
| 06/03/1980 | US4206416 Wideband instrumentation amplifier with high common mode rejection |
| 06/03/1980 | CA1078931A1 D.c. amplifier for use with low supply voltage |
| 06/03/1980 | CA1078930A1 Amplifier |
| 05/29/1980 | WO1980001124A1 Amplifier circuit |
| 05/28/1980 | EP0011446A1 A frequency characteristic-adjusting circuit |
| 05/27/1980 | US4205274 Power amplifier circuit |
| 05/27/1980 | US4205273 Pulse signal amplifier |
| 05/27/1980 | CA1078536A1 Bilateral voice-signal controller for use in the two-wire portion of the telephone circuit |
| 05/27/1980 | CA1078504A1 Video amplifier including an a-c coupled voltage follower output stage |
| 05/27/1980 | CA1078470A1 Current mirror amplifier |
| 05/27/1980 | CA1078469A1 Differential amplifier |
| 05/15/1980 | WO1980001023A1 High efficiency,light weight audio amplifier and power supply |
| 05/13/1980 | US4203137 Dual mode read preamplifier with electrical short detector |
| 05/13/1980 | CA1077581A1 Class b amplifier |
| 05/13/1980 | CA1077580A1 Low-frequency power amplifier |
| 05/06/1980 | US4201947 Long-tailed-pair connections of MOSFET's operated in sub-threshold region |
| 05/06/1980 | US4201886 Plural concentric moving coil speaker with push-pull voltage follower direct coupling |
| 05/06/1980 | CA1077143A1 Amplifier with modulated power supply voltage |
| 05/01/1980 | WO1980000900A1 Operational amplifier with compensated input shifting voltage |
| 04/22/1980 | US4199797 Protective circuit for amplifier circuits |
| 04/22/1980 | US4199732 Amplifying circuit |
| 04/22/1980 | US4199731 Reversable electrically alterable amplifier configurations |
| 04/22/1980 | US4199730 Double peaked amplifier |
| 04/16/1980 | EP0010014A1 Charge transfer filter and switched capacitor filter comprising a voltage muliplier having switched capacitors |
| 04/16/1980 | EP0009599A1 Circuit for reducing the noise in the read-signal of a magnetic layer memory |
| 04/15/1980 | US4198610 Audio amplifier |
| 04/15/1980 | CA1075773A1 Am-fm receiver having improved mode conversion |
| 04/08/1980 | US4197511 Linear load MOS transistor circuit |
| 04/08/1980 | US4197472 Voltage comparator having capacitively cascade-connected inverting amplifiers |
| 04/01/1980 | US4196397 Synchro power buffer amplifier |
| 04/01/1980 | CA1074876A1 Tuned radio frequency amplifier with back to back varactor diodes connected through a common cathode lead |
| 03/25/1980 | US4195267 Low-level preamplifier circuit |
| 03/25/1980 | US4195266 Commutating signal level translator |
| 03/19/1980 | EP0008896A1 An output section for a microwave amplifier, a microwave amplifier and a circuit for use in a microwave amplifier |
| 03/19/1980 | EP0008617A1 Read/write preamplifier with electrical short detector |
| 03/18/1980 | US4194166 Differential amplifier with a current mirror circuit |
| 03/18/1980 | US4194165 Miniature guitar amplifier |
| 03/18/1980 | US4194136 Input stage using junction field effect transistors for biasing |
| 03/18/1980 | CA1073973A1 Current control circuit |
| 03/11/1980 | US4193040 High-voltage amplifier with low output impedance |
| 03/04/1980 | US4191929 Isolation amplifier with high linearity |
| 03/04/1980 | CA1073060A1 Transistor amplifier |
| 02/26/1980 | US4190805 Commutating autozero amplifier |
| 02/26/1980 | CA1072645A1 Differential amplifier |
| 02/19/1980 | US4189683 Solid state diode amplifier |
| 02/19/1980 | US4189682 Microwave FET power circuit |
| 02/12/1980 | US4188588 Circuitry with unbalanced long-tailed-pair connections of FET's |
| 02/12/1980 | US4188586 Demodulator circuit for chopper amplifier |
| 02/12/1980 | US4188551 Amplifier circuit having photoelectric converter |
| 02/05/1980 | US4187471 Bias circuit |
| 02/05/1980 | US4187467 Grounded RF power amplifier circuit apparatus |
| 01/29/1980 | US4186437 Push-pull switching power amplifier |
| 01/29/1980 | US4186346 Amplitude modulated transmitter |
| 01/29/1980 | US4186273 Stereophonic system having power amplifiers and speakers in a bridge circuit with capacitor connecting junction of speakers to common terminal |
| 01/23/1980 | EP0007074A1 Amplifier arrangement with suppression of interference signals |
| 01/22/1980 | US4185249 Bipolar signal to current converter |
| 01/22/1980 | US4185211 Electrical circuits |
| 01/15/1980 | US4184187 Unbalanced DC voltage detecting circuit |
| 01/15/1980 | US4184176 Amplifier having different low-frequency and high-frequency feedback networks |
| 01/15/1980 | US4184124 Operational amplifier |
| 01/15/1980 | US4184123 Double-tuned output circuit for high power devices using coaxial cavity resonators |
| 01/09/1980 | EP0006785A1 Cathode heating device for electron power tube and emitter including such a device |
| 01/09/1980 | EP0006194A1 Circuit arrangement for the ungrounded transmission of signals across points of isolation in communication systems |
| 01/08/1980 | US4183020 Amplifier with field effect and bipolar transistors |
| 01/08/1980 | US4182992 Pulse width modulated signal amplifier |
| 01/08/1980 | US4182936 Transformerless trunk circuit |
| 01/08/1980 | CA1069594A1 Wide-band transistor amplifier |
| 01/01/1980 | US4181889 Citizens band transmitter with overall envelope feedback from antenna coupling filter |
| 01/01/1980 | CA1069189A Modular low noise preamplifier |
| 01/01/1980 | CA1069188A Planar transmission line comprising a material having negative differential conductivity |
| 12/25/1979 | US4180782 Phantom full-bridge amplifier |
| 12/25/1979 | US4180781 Biasing and drive circuitry for quasi-linear transistor amplifiers |
| 12/25/1979 | US4180780 Input decoupling circuit for transistor differential amplifier |
| 12/25/1979 | CA1068795A Offset adjustment circuit |
| 12/18/1979 | USRE30173 Current mirror amplifier |
| 12/18/1979 | US4179715 Electric circuit for accessory for host tape recorder |
| 12/18/1979 | US4179669 Amplifying and equalizing |
| 12/18/1979 | US4179668 HF-amplifier circuit |
| 12/18/1979 | CA1068358A1 Parametrically-stable negative resistance diode circuit |
| 12/18/1979 | CA1068346A1 Arrangement for the transmission of information signals by pulse code modulation |
| 12/18/1979 | CA1068336A1 Current divider |
| 12/11/1979 | US4178559 Amplifier distortion reduction apparatus |
| 12/11/1979 | US4178558 DC Level clamping circuit |
| 12/11/1979 | US4178557 Linear amplification with nonlinear devices |
| 12/11/1979 | US4178556 Class D amplifier system |
| 12/11/1979 | US4178485 Transformerless telephone line circuit |
| 12/04/1979 | US4177433 Reel motor preamplifier |
| 12/04/1979 | US4177432 Multi output differential amplifier |
| 12/04/1979 | US4177409 Video amplifier for displaying four or more video levels on a cathode ray tube |
| 11/27/1979 | US4176323 Transistorized power amplifier |
| 11/20/1979 | US4175257 Modular microwave power combiner |
| 11/14/1979 | EP0005396A1 Hyperfrequency circuit with a resonant cavity equipped with pairs of peripheral diodes |
| 11/13/1979 | US4174503 Modular low noise preamplifier |
| 11/06/1979 | US4173769 Circuit arrangement a portion of which is included within in a monolithic integrated semiconductor body |