| 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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| 03/01/1994 | US5291121 Rail splitting virtual ground generator for single supply systems |
| 02/23/1994 | EP0583991A1 Device for biasing an RF device operating in quasi-linear modes with temperature compensation |
| 02/23/1994 | CN1082782A Additional ciruit for transistor power amplification circuit |
| 02/22/1994 | US5289550 Modulated light source with a linear transfer function and method utilizing same |
| 02/22/1994 | US5289136 Bipolar differential pair based transconductance element with improved linearity and signal to noise ratio |
| 02/17/1994 | DE4226806A1 Linearisation method for HF amplifier output stage - dividing input signal between push=pull class=AB amplifier and parallel linear amplifier |
| 02/16/1994 | EP0583203A1 Circuit that pulls the input of an integrated circuit into a defined state |
| 02/16/1994 | EP0582649A1 Wide-band transconductance generator |
| 02/15/1994 | US5287069 Constant-amplitude wave combination type amplifier |
| 02/15/1994 | US5287068 Comparator amplifier |
| 02/09/1994 | EP0582365A1 Dual input signal summer circuit |
| 02/09/1994 | EP0582275A1 Method for generating a distortion-free frequency modulated signal and device for implementing such a method |
| 02/09/1994 | EP0581892A1 Linear amplifier having path time delay compensation |
| 02/09/1994 | EP0581799A1 Adaptive phase control for a power amplifier predistorter. |
| 02/09/1994 | CN1081794A RF amplifier bias control method and apparatus |
| 02/08/1994 | US5285172 Current mirror power amplifier with gain controlled by resistor-capacitor network |
| 02/08/1994 | US5285171 High output impedance amplifier |
| 02/08/1994 | US5285169 Monolithic integrated differential amplifier with digital gain setting |
| 02/03/1994 | WO1994002934A1 Semiconductor emulation of vacuum tubes |
| 02/02/1994 | EP0580933A1 Circuit device for reducing power consumption in an analog amplifier |
| 02/02/1994 | EP0580927A1 Operational amplifier |
| 02/02/1994 | EP0580922A1 RC Filter for low and very low frequency applications |
| 02/01/1994 | US5283535 Differential amplifier arrangement |
| 02/01/1994 | CA1326701C Amplifier |
| 01/26/1994 | EP0580301A2 Circular limiter |
| 01/26/1994 | EP0580125A1 Predistorter for linearization of electronic and optical signals |
| 01/26/1994 | EP0579974A1 Drift suppressing circuit of gyroscope |
| 01/26/1994 | EP0424394B1 Means for reducing damage to jfets from electrostatic discharge events |
| 01/25/1994 | US5282072 Shunt-expansive predistortion linearizers for optical analog transmitters |
| 01/25/1994 | US5282039 Video signal amplifier arrangement for a television display tube |
| 01/25/1994 | US5281925 RF amplifier providing reduced drive response rise times and fall times |
| 01/25/1994 | US5281866 Reference voltage circuit allowing fast power up from low power standby condition |
| 01/20/1994 | WO1994001930A1 Rf amplifier bias control method and apparatus |
| 01/20/1994 | WO1994001928A1 Audio power amplifier with noise prevention at turn-on and turn-off |
| 01/19/1994 | EP0579293A1 Hybrid amplifier |
| 01/18/1994 | US5280633 Active antenna for two-way transmission |
| 01/18/1994 | US5280235 Fixed voltage virtual ground generator for single supply analog systems |
| 01/12/1994 | EP0578526A1 Hugh-voltage switch circuit |
| 01/12/1994 | EP0578389A2 Audio amplifier circuit and method of operation |
| 01/12/1994 | EP0577896A1 Preamplifier |
| 01/12/1994 | CN1080742A Reference voltage generator with cmos transistor |
| 01/12/1994 | CN1023534C Fet comparator circuitry |
| 01/11/1994 | US5278997 Dynamically biased amplifier |
| 01/11/1994 | US5278996 Portable transceiver having consumption-current stabilizing function |
| 01/11/1994 | US5278994 Power amplifier saturation detection and correction method and apparatus |
| 01/11/1994 | US5278517 FET amplifier with gate voltage control |
| 01/11/1994 | US5278516 Buffer circuit |
| 01/11/1994 | US5278461 Integrated transistor circuit |
| 01/11/1994 | CA2027890C Digital process and device for correcting the non-linearity of a transmission system |
| 01/05/1994 | EP0576770A1 Audio Amplifier turn-off control circuit |
| 01/04/1994 | US5276921 Transmitter with nonlinearity correction circuit |
| 01/04/1994 | US5276917 Transmitter switch-on in a dual-mode mobile phone |
| 01/04/1994 | US5276562 Emphasis apparatus disposed in either a record or playback system having triple weight coefficient generating devices |
| 01/04/1994 | US5276404 Constant current video amplifier |
| 01/04/1994 | CA2046413C Feed-forward amplifier |
| 01/04/1994 | CA2008594C Transmitter using gallium arsenide fet with means for controlling gate bias voltage of the fet for suppressing undesired signal at a start condition of the transmitter |
| 12/29/1993 | EP0576341A1 Power amplifier circuit for a composite signal |
| 12/28/1993 | US5274342 Microwave monolithic integrated circuit (MMIC) including distributed cascode bipolar transistor amplifier unit |
| 12/28/1993 | US5274341 High-frequency power amplifier |
| 12/27/1993 | CA2099216A1 Power amplifier device for a composite signal |
| 12/23/1993 | WO1993026087A1 Feedback isolation amplifier |
| 12/23/1993 | WO1993026086A1 Compensating for non-linear effects in signal processing with active devices |
| 12/22/1993 | EP0574646A1 A circuit for controlling the maximum current in a power-MOS transistor used for driving a load connected to ground |
| 12/21/1993 | US5272450 DC feed network for wideband RF power amplifier |
| 12/21/1993 | US5272449 Vertical amplifier system for multitrace oscilloscope and method for calibrating the same |
| 12/15/1993 | EP0574180A2 Balanced driver circuit for eliminating inductive noise |
| 12/15/1993 | CN1079597A Zero-signal automatic squelch circuit for power amplification |
| 12/15/1993 | CN1023173C Process for compensation nonlinearities in amplifier circuit |
| 12/14/1993 | US5270883 Magnetic read/write circuit |
| 12/14/1993 | US5270667 Impedance matching and bias feed network |
| 12/08/1993 | EP0573359A1 Treatment and precorrection device of an audio frequency signal before its amplification in an amplifier chain of an amplitude modulated emitter |
| 12/08/1993 | EP0573240A2 Reference voltage generator |
| 12/08/1993 | EP0572755A1 Turn-on control circuit for electric devices |
| 12/07/1993 | US5268649 Bias circuit for bipolar transistors |
| 12/07/1993 | US5268601 Logarithmic amplifier circuit with temperature compensation |
| 12/07/1993 | US5268527 Audio power amplifier with reactance simulation |
| 12/07/1993 | CA2005228C High fidelity regenerative amplifier with phase correction circuit |
| 12/06/1993 | CA2097555A1 Device for the processing and pre-correction of an audio signal before it is amplified in an amplification system of a transmitter with amplitude modulation |
| 12/01/1993 | EP0571512A1 Gain linearity correction circuit for mos circuits |
| 12/01/1993 | CN1022966C Method and device for fast phase shift adjusting of linear transmitter |
| 11/30/1993 | US5266906 Linear amplifier performing distortion compensation control |
| 11/30/1993 | US5266905 Audio amplifier with amplified feedback |
| 11/25/1993 | WO1993023921A1 Method and apparatus for amplifying, modulating and demodulating |
| 11/25/1993 | WO1993023876A1 Current mirror with at least one pnp transistor |
| 11/25/1993 | DE4216684A1 Stromspiegel mit wenigstens einem pnp-Transistor Current mirror with at least one pnp transistor |
| 11/25/1993 | CA2135304A1 Method and apparatus for amplifying modulating and demodulating |
| 11/24/1993 | EP0571302A1 Amplifier with limited output current |
| 11/24/1993 | EP0570897A2 Device for delivering an attenuator control signal |
| 11/24/1993 | EP0570655A1 Audio amplifier on-off control circuit |
| 11/24/1993 | EP0570617A1 Protective apparatus for power transistor |
| 11/23/1993 | US5264807 High frequency power amplifier with high efficiency and low distortion |
| 11/23/1993 | US5264806 Bipolar microwave monolithic amplifier with active feedback |
| 11/18/1993 | EP0570011A1 Operational amplifier with common-mode feedback amplifier circuit |
| 11/18/1993 | EP0569554A1 Transmission of multiple carrier signals in a nonlinear system |
| 11/18/1993 | DE4215963A1 Operational amplifier referred to digitally stored average input - obtains average input from detected peak values of output of magnetoresistive potential divider and maintains when input is removed |
| 11/18/1993 | DE4215444A1 IC with analog and digital stages - has portion for level matching analog stage to digital stage, with coupling capacitor |
| 11/16/1993 | US5262734 Amplification systems |
| 11/16/1993 | US5262733 Pulse-width modulation amplifier |
| 11/16/1993 | US5262688 Operational amplifier circuit |
| 11/16/1993 | US5261407 Ultrasonic doppler blood-flow meter |