| Patents for H03F 1 - Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements (30,272) |
|---|
| 03/08/1990 | WO1990002443A1 A switchable dc power supply with increased efficiency for use in large wattage amplifiers |
| 03/07/1990 | EP0357365A2 An audio amplifier |
| 03/07/1990 | EP0357131A2 Amplifier arrangement, in particular for amplifying a digital signal |
| 03/01/1990 | DE3829135A1 Operational amplifier with a wide bandwidth |
| 02/28/1990 | EP0355670A2 Low noise microwave amplifier having optimal stability, gain, and noise control |
| 02/27/1990 | US4905086 Television transmitter employing klystron with nonlinearity correction circuit |
| 02/27/1990 | US4904952 Differential amplifier incorporating negative resistance |
| 02/22/1990 | WO1990001831A1 Wide-band amplifier |
| 02/20/1990 | US4902984 Differential amplifier |
| 02/20/1990 | US4902983 Nonlinear signal generating circuit and nonlinear compensating device using the same |
| 02/20/1990 | US4902982 Nonlinear noninverting transimpedance amplifier |
| 02/20/1990 | US4902981 Well casing potential measurement tool with compensated DC errors |
| 02/15/1990 | DE3827579A1 Transmitter arrangement |
| 02/14/1990 | EP0354587A2 Power saving low frequency power amplifier |
| 02/14/1990 | EP0354557A2 Differential amplifier with an improved gain characteristic in a high frequency region |
| 02/13/1990 | US4901272 Variable phase compensating apparatus |
| 02/13/1990 | US4901030 Operational amplifier stages |
| 02/13/1990 | US4901029 Solid-state high power amplifier arrangement |
| 02/13/1990 | US4901028 Field emitter array integrated distributed amplifiers |
| 02/08/1990 | DE3820985A1 Method and arrangement for cancelling the intermodulation distortion of a transmitter |
| 02/07/1990 | EP0265435B1 Circuit for protecting against interference voltages occurring on signalling lines |
| 02/06/1990 | US4899116 Apparatus and method for paralleling power field effect transistors in high frequency amplifiers |
| 01/31/1990 | EP0352790A2 Integrator and active filter including integrator with simple phase compensation |
| 01/31/1990 | EP0352516A2 Integrated power transistor comprising means for reducing thermal stresses |
| 01/30/1990 | US4897616 Wide band amplifier with current mirror feedback to bias circuit |
| 01/30/1990 | US4897613 Temperature-compensated circuit for GaAs ECL output buffer |
| 01/30/1990 | US4897611 Very high gain positive feedback CMOS transconductance amplifier |
| 01/30/1990 | US4897610 Negative-feedback amplifier with accurately defined input or output impedance combined with high or low output or input impedance respectively |
| 01/30/1990 | CA1265216A1 Power amplifier |
| 01/24/1990 | EP0352021A2 Optical amplifier with reduced nonlinearity |
| 01/24/1990 | EP0352009A2 Amplifier circuit |
| 01/24/1990 | EP0351709A2 Differential amplifier with controllable power consumption |
| 01/24/1990 | EP0351708A2 Differential amplifier with controllable power consumption |
| 01/24/1990 | EP0351639A2 Input circuit for a high-frequency amplifier |
| 01/23/1990 | CA1264826A1 Composite audio amplifier |
| 01/17/1990 | CN2051418U Linear wide frequency band amplifier |
| 01/09/1990 | US4893252 Monitoring system for the output stage of a bridge |
| 01/09/1990 | US4893159 Protected MOS transistor circuit |
| 01/09/1990 | US4893092 Operational amplifier circuit |
| 01/09/1990 | US4893091 Complementary current mirror for correcting input offset voltage of diamond follower, especially as input stage for wide-band amplifier |
| 01/09/1990 | US4893088 For converting photo currents into voltage |
| 12/27/1989 | EP0348079A2 Symmetric integrated amplifier with controlled DC offset voltage |
| 12/27/1989 | EP0347569A2 Power control arrangement |
| 12/27/1989 | CN1006269B Multi-level power amplifying circuitry for portable radio transoeivers |
| 12/27/1989 | CA1264067A1 Multi-level power amplifying circuitry for portable radio transceivers |
| 12/26/1989 | US4890331 Specialized amplifier systems for musical instruments |
| 12/26/1989 | US4890300 Radio transmitters |
| 12/26/1989 | US4890070 Device to control the output power of a class C amplifier |
| 12/26/1989 | US4890067 Common base configuration for an fT doubler amplifier |
| 12/26/1989 | US4890052 Temperature constant current reference |
| 12/26/1989 | US4890014 Sequential operation differential current amplifier |
| 12/20/1989 | EP0347141A2 Improved RF power-control circuit |
| 12/19/1989 | US4888563 Audio amplifier having a low-noise input stage |
| 12/19/1989 | US4888562 Low noise, high speed current or voltage amplifier |
| 12/19/1989 | US4888561 Amplifier and display using the former |
| 12/19/1989 | US4888559 Correction arrangement for an amplifier |
| 12/13/1989 | EP0346011A2 Amplifiers |
| 12/13/1989 | EP0345303A1 Adaptive thermal protection for a power amplifier by remote sense |
| 12/12/1989 | US4887181 Circuit for temperature protection with hysteresis |
| 12/12/1989 | US4887047 Current sense amplifier with low, nonlinear input impedance and high degree of signal amplification linearity |
| 12/12/1989 | US4886982 Power transistor with improved resistance to direct secondary breakdown |
| 12/06/1989 | EP0344855A1 Transconductance circuit |
| 12/06/1989 | EP0344545A2 Temperature compensation circuit in a negative impedance driving amplifier |
| 12/06/1989 | EP0344510A2 A muting circuit for audio amplifiers |
| 12/06/1989 | EP0344227A1 Temperature compensated logarithmic amplifier |
| 12/05/1989 | US4885551 Feed forward linear amplifier |
| 12/05/1989 | US4885548 Wideband amplifier |
| 12/05/1989 | US4885517 Voice coil actuator positioning amplifier |
| 12/05/1989 | CA1263707A1 Am-rf transmitter with compensation for power supply variations |
| 11/30/1989 | DE3904402A1 Differential amplifier circuit |
| 11/29/1989 | EP0343553A2 Low voltage-controlled, stand-by electronic circuit with delayed switch off |
| 11/28/1989 | US4883991 Circuit arrangement for adjusting a reference level in a periodic signal |
| 11/28/1989 | US4883987 Comparator circuit having a fast recovery time |
| 11/21/1989 | US4882767 Stabilized transmitter |
| 11/21/1989 | US4882548 Low distortion current mirror |
| 11/21/1989 | US4882547 Linearizer control system |
| 11/21/1989 | US4882482 Thermally stabilized optical preamplifier |
| 11/21/1989 | CA1263178A1 Noise and arc suppression filter for a display driver stage |
| 11/21/1989 | CA1263154A1 Class ab amplifier, and its distortion corrector |
| 11/16/1989 | WO1989011124A1 Voltage control circuit |
| 11/15/1989 | EP0341363A2 Precision operational amplifier |
| 11/07/1989 | US4879525 High gain RF amplifier with directional coupler feedback |
| 11/07/1989 | US4879523 High accuracy, high impedance differential to single-ended current converter |
| 11/07/1989 | US4879520 High accuracy current source and high accuracy transconductance stage |
| 11/07/1989 | US4879519 Predistortion compensated linear amplifier |
| 11/02/1989 | WO1989010656A1 Amplifier circuit |
| 11/02/1989 | WO1989010649A1 Means for reducing damage to jfets from electrostatic discharge events |
| 11/02/1989 | EP0339736A1 Transistor arrangement with drive current limitation |
| 11/02/1989 | EP0339481A2 Wideband amplifier |
| 10/31/1989 | US4878034 Digital protection circuit and method for linear amplifier |
| 10/31/1989 | US4878033 Low noise microwave amplifier having optimal stability, gain, and noise control |
| 10/31/1989 | US4878030 Linearizer for microwave amplifier |
| 10/25/1989 | CN1036678A Video display driver apparatus |
| 10/24/1989 | US4876499 Differental voltage controlled exponential current source |
| 10/19/1989 | WO1989010026A1 High-gain ic amplifier |
| 10/18/1989 | EP0337747A1 Circuit for producing a constant voltage |
| 10/18/1989 | EP0337223A2 Circuit arrangement for working point adjustment of a transistor |
| 10/10/1989 | US4873493 Audio amplifier |
| 10/04/1989 | EP0335607A1 Video display driver apparatus |
| 10/04/1989 | EP0335102A2 MOS stage with high output resistance particularly for integrated circuits |