| 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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| 06/07/1994 | CA1330110C Integrated circuit rf amplifier module |
| 06/01/1994 | EP0599327A1 Variable gain amplifier |
| 06/01/1994 | DE4318728C1 Chopper stabilised sigma-delta analogue=to=digital converter - has chopper-sigma-delta converter which receives chopped analogue signal from time discrete multiplier |
| 06/01/1994 | CN1024880C Linear amplifier |
| 05/31/1994 | US5317470 Control system including a switching circuit for ensuring proper operation when operating power is removed from a portion of the control system |
| 05/31/1994 | US5317281 Slew rate booster circuit |
| 05/31/1994 | US5317280 High impedance circuit using PFET |
| 05/31/1994 | US5317279 Linear voltage to current converter including feedback network |
| 05/31/1994 | US5317277 Power amplifying apparatus for supplying A.C. signals having a maximum loop gain at a desired frequency |
| 05/26/1994 | WO1994011946A1 Two-port wideband bipolar transistor amplifiers |
| 05/26/1994 | WO1994011799A1 Switching regulator and amplifier system |
| 05/26/1994 | CA2149308A1 Two-port wideband bipolar transistor amplifiers |
| 05/25/1994 | EP0598647A1 Semi-active electromagnetic sensors with distributed transfer function |
| 05/25/1994 | EP0598585A2 Automatic calibration of the quadrature balance within a cartesian amplifier |
| 05/25/1994 | EP0598578A2 Symmetrical bipolar bias current source with high power supply rejection ratio (PSRR) |
| 05/25/1994 | EP0598445A1 MOS technology amplifier circuit |
| 05/24/1994 | US5315449 Time code signal processing circuit for removing and restoring variation in slew rate |
| 05/24/1994 | US5315268 Audio power amplifier |
| 05/24/1994 | US5315266 Amplifier having improved capacitive drive capability |
| 05/24/1994 | US5315265 Low intermodulation distortion FET amplifier using parasitic resonant matching |
| 05/24/1994 | US5315263 Push-pull amplifier having bootstrap capacitor isolation |
| 05/24/1994 | US5315231 Symmetrical bipolar bias current source with high power supply rejection ratio (PSRR) |
| 05/24/1994 | US5315166 Substrate voltage generator and method therefor in a semiconductor device having selectively activated internal stepped-down power supply voltages |
| 05/20/1994 | CA2103403A1 Distributed transfer function semi-active electromagnetic sensors |
| 05/18/1994 | EP0597420A1 Differential amplifier circuit using quadritail circuit |
| 05/17/1994 | US5313171 High speed, low distortion amplifier design and method |
| 05/11/1994 | WO1994010765A1 Power amplifier linearization in a tdma mobile radio system |
| 05/11/1994 | EP0596562A1 Device comprising a circuit for processing an alternating signal |
| 05/11/1994 | EP0596208A1 Audio amplifier with automatic reduction of amplification after thermal protection switching |
| 05/11/1994 | EP0596061A1 Current mirror with at least one pnp transistor |
| 05/11/1994 | DE4242989C1 Longitudinal voltage regulator using regulation loop - uses sensor in starting circuit for initiating starting phase to bring regulation into normal operating range |
| 05/11/1994 | CN1086643A Switch for short-circuit at input of power amplfying transistor |
| 05/10/1994 | US5311557 Circular limiter for use in a receiver to reduce the effects of signal distortion |
| 05/10/1994 | US5311391 Electrostatic discharge protection circuit with dynamic triggering |
| 05/10/1994 | US5311147 High impedance output driver stage and method therefor |
| 05/10/1994 | US5311143 RF amplifier bias control method and apparatus |
| 05/10/1994 | US5311142 Amplifier circuit with gain that does not vary with power supply fluctuations |
| 05/10/1994 | US5311141 Active filter circuit |
| 05/10/1994 | US5311088 Transconductance cell with improved linearity |
| 05/10/1994 | US5311077 Power supply, temperature, and load capacitance compensating, controlled slew rate output buffer |
| 05/10/1994 | CA1329426C Solid-state high power amplifier arrangement |
| 05/04/1994 | EP0595561A1 Amplifiers |
| 05/04/1994 | EP0595018A2 Monolithically integrated final MOS-transistor stage with an overheating preventing circuit |
| 05/04/1994 | EP0594971A1 High impedance output driver stage and method therefor |
| 05/03/1994 | US5309298 Suppression of magnetic instability in inductive recording heads |
| 04/28/1994 | WO1994009574A1 Postdistortion circuit for reducing distortion in an optical communications system |
| 04/28/1994 | WO1994009415A1 Method and apparatus for controlling a current generator |
| 04/28/1994 | CA2146758A1 Postdistortion circuit for reducing distortion in an optical communications system |
| 04/27/1994 | EP0594358A2 Method and apparatus for reducing the peak-to-average power in multi-carrier RF communication systems |
| 04/27/1994 | EP0594352A2 Circuitry for minimizing peak power in an amplifier carrying a plurality of signals of differing frequencies |
| 04/27/1994 | CN1024383C Method of compensating for non-linearities in end amplifier incorporated in radio transmitter |
| 04/26/1994 | US5307025 Audio power amplifier with noise prevention at turn-on and turn-off |
| 04/26/1994 | US5307024 Linearized level-shifting amplifier |
| 04/26/1994 | US5307022 High dynamic range modulation independent feed forward amplifier network |
| 04/20/1994 | CN1024309C Method for detecting and correcting saturation of power amplifier and apparatus thereof |
| 04/20/1994 | CN1024307C Feedforward amplifier network with scanning frequency pilot tone |
| 04/19/1994 | US5304949 Buffer circuit |
| 04/19/1994 | US5304947 Arrangement for eliminating offset errors in a power control circuit of a pulsed transmitter final amplifier |
| 04/19/1994 | US5304946 Amplifier circuit having an operation point maintaining input and output voltages constant even if a gain thereof is varied |
| 04/19/1994 | US5304945 Low-distortion feed-forward amplifier |
| 04/19/1994 | US5304944 High frequency linearizer |
| 04/19/1994 | US5304943 In-phase combiner and RF recovery system |
| 04/19/1994 | US5304918 Reference circuit for high speed integrated circuits |
| 04/19/1994 | US5304865 Comparator circuit comprising input signal attenuator |
| 04/19/1994 | US5304859 Substrate voltage generator and method therefor in a semiconductor device having internal stepped-down power supply voltage |
| 04/13/1994 | CN1085360A Applique circuit of transistor power amplifier circuit |
| 04/13/1994 | CN1024238C Positive feedback distortion minimizing circuit |
| 04/12/1994 | US5303397 Semiconductor integrated circuit containing a circuit having an impedance circuit externally attached thereto |
| 04/12/1994 | US5302915 Unity-gain, wide bandwidth, bipolar voltage follower with a very low input current |
| 04/12/1994 | US5302914 Method and apparatus for reducing the peak-to-average power in multi-carrier RF communication systems |
| 04/12/1994 | US5302912 Push-pull audio amplifier with crossover distortion compensation |
| 04/12/1994 | US5302911 Preamplifier |
| 04/06/1994 | EP0591032A1 Push-pull power amplifier with transformer feedback for metric waves |
| 04/06/1994 | EP0590903A1 Output limiter for class-D BICMOS hearing aid output amplifier |
| 04/06/1994 | EP0590706A1 Amplifier apparatus |
| 04/05/1994 | US5300897 Amplifier protection circuit |
| 04/05/1994 | US5300894 Circuitry for minimizing peak power in an amplifier carrying a plurality of signals of differing frequencies |
| 04/05/1994 | US5300892 Audio signal amplifier circuit |
| 03/30/1994 | EP0589676A1 Variable voltage to current conversion circuit |
| 03/29/1994 | US5299003 Signal processing apparatus for changing the frequency characteristics of an input signal |
| 03/29/1994 | US5298869 Constant current and constant voltage regulating circuit for common-gate or common-base transistor devices |
| 03/23/1994 | EP0588444A1 Modulation system capable of accurately compensating for nonlinearities of an amplifier connected thereto |
| 03/23/1994 | EP0587965A1 Differential transconductance stage, dynamically controlled by the input signal's amplitude |
| 03/22/1994 | US5296825 Bias circuit having signal output to detector portion |
| 03/22/1994 | US5296762 Bidirectional microwave amplifier apparatus |
| 03/22/1994 | US5296754 Push-pull circuit resistant to power supply and temperature induced distortion |
| 03/17/1994 | WO1994006206A1 Push pull buffer with noise cancelling symmetry |
| 03/16/1994 | EP0587509A1 Voltage-current converter circuit |
| 03/16/1994 | EP0587265A1 Cross coupled op-amp input transconductance reduction |
| 03/16/1994 | CN1083986A Highdynamic range modulation independent feed forward amplifier network |
| 03/09/1994 | EP0586251A1 Power amplifier having high output voltage swing and high output drive current |
| 03/09/1994 | EP0586038A1 Local feedback stabilized emitter follower cascade |
| 03/09/1994 | EP0585421A1 High dynamic range modulation independent feed forward amplifier network |
| 03/09/1994 | CN1083640A Apparatus for compensating of phase rotation in a final amplifier stage |
| 03/08/1994 | CA2012969C Magnetic reproducing head amplifier |
| 03/03/1994 | WO1994005079A1 Amplifier stage with low thermal distortion |
| 03/03/1994 | WO1994005078A1 Apparatus for compensating of phase rotation in a final amplifier stage |
| 03/02/1994 | EP0584437A1 Transconductor stage |
| 03/02/1994 | EP0584312A1 Rf power amplifier with linearizattion |
| 03/01/1994 | US5291148 Gain linearization with coplanar waveguide |