| 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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| 02/12/2004 | WO2004013961A1 Gain-controlled amplifier, receiver circuit and radio communication device |
| 02/12/2004 | WO2004013958A1 Power minimization, correlation-based closed loop for controlling predistorter and vector modulator feeding rf power amplifier |
| 02/12/2004 | WO2004013957A2 Circuit for power amplification |
| 02/12/2004 | WO2003100964A3 Signal correction by predistortion |
| 02/12/2004 | WO2003049284A3 Integrated circuit with an amplifier |
| 02/12/2004 | WO2003019776A3 Rf amplifier and method therefor |
| 02/12/2004 | WO2002101944A3 Power amplifier control |
| 02/12/2004 | WO2002087072A3 Bias method and circuit for distortion reduction |
| 02/12/2004 | WO2002050996A3 Compact cascode radio frequency cmos power amplifier |
| 02/12/2004 | US20040030537 Method and apparatus for responding to threshold events from heterogeneous measurement sources |
| 02/12/2004 | US20040030535 Data processing system |
| 02/12/2004 | US20040029539 Receiver |
| 02/12/2004 | US20040029535 Radio-frequency power amplification circuit having stabilization circuit |
| 02/12/2004 | US20040028242 Audio reproducing apparatus and method |
| 02/12/2004 | US20040027759 Overcurrent detecting circuit |
| 02/12/2004 | US20040027755 Reconfigurable distributed active transformers |
| 02/12/2004 | US20040027490 Ring triggered mute |
| 02/12/2004 | US20040027202 Distributed level-shifting network for cascading broadband amplifiers |
| 02/12/2004 | US20040027198 Linearizing LINC amplifiers using pre-distortion |
| 02/12/2004 | US20040027197 Power amplifier arrangement |
| 02/12/2004 | US20040027195 Amplifier |
| 02/12/2004 | DE10255352B3 Correction of signal distortions in amplifier unit, operates pulse width modulator using variable frequency system clock |
| 02/12/2004 | DE10231400B3 Line driver circuit includes section producing control signal from input voltage, which varies potential at central tapping of transmitter primary winding |
| 02/11/2004 | EP1388935A1 Active load device for biasing an ultra wideband distributed amplifier with gain control |
| 02/11/2004 | EP1388934A2 Feedforward amplifier |
| 02/11/2004 | EP1388170A2 Bond wire tuning of rf power transistors and amplifiers |
| 02/11/2004 | CN1475043A Nonlinear distortion compensation power amplifier |
| 02/11/2004 | CN1474516A Device and method of pre-distorsion for compensating power amplifier |
| 02/11/2004 | CN1138339C Variable output amplifier apparatus |
| 02/10/2004 | US6691074 System for three dimensional positioning and tracking |
| 02/10/2004 | US6690743 Compensation of delay in linearization loop of power amplifier |
| 02/10/2004 | US6690251 Tunable ferro-electric filter |
| 02/10/2004 | US6690238 Variable phase-shifting rf power amplifiers |
| 02/10/2004 | US6690237 High frequency power amplifier, and communication apparatus |
| 02/10/2004 | US6690235 Distortion generation in balanced and unbalanced signals |
| 02/10/2004 | US6690233 Efficient, precise RF modulation using multiple amplifier stages |
| 02/10/2004 | US6690231 Gain stage that minimizes the miller effect |
| 02/10/2004 | US6690176 Low-loss tunable ferro-electric device and method of characterization |
| 02/05/2004 | WO2003100965A3 High speed amplifier incorporating pre-emphasis |
| 02/05/2004 | US20040021999 Input protection circuit |
| 02/05/2004 | US20040021520 Operational amplifier |
| 02/05/2004 | US20040021517 Power minimization, correlation-based closed loop for controlling predistorter and vector modulator feeding RF power amplifier |
| 02/05/2004 | US20040021516 Distortion compensation apparatus |
| 02/05/2004 | US20040021514 Distortion detection for a power amplifier |
| 02/05/2004 | DE10230919A1 High frequency radio transmitter operating method, for linearized amplifier system, controlling amplifier voltage supply according to measured modulation envelope |
| 02/04/2004 | EP1387493A2 Input protection circuit |
| 02/04/2004 | EP1387486A2 Amplifier circuit and multistage amplifier circuit |
| 02/04/2004 | EP1387485A1 Circuit for power amplification |
| 02/04/2004 | EP1386391A2 Photodetector preamplifier circuit having a rotating input stage |
| 02/04/2004 | EP1386390A2 High-frequency amplifier circuit with independent control of quiescent current and bias impedance |
| 02/04/2004 | CN1473395A System for closed loop power control using linear or non-linear power amplifier |
| 02/04/2004 | CN1472883A Method and device for conveniently fixing power push-pull amplifiers |
| 02/03/2004 | US6687491 Direct conversion of low power high linearity receiver |
| 02/03/2004 | US6687312 Signal processing system |
| 02/03/2004 | US6686804 Frequency synthesizer using a VCO having a controllable operating point, and calibration and tuning thereof |
| 02/03/2004 | US6686800 Low noise, electric field sensor |
| 02/03/2004 | US6686796 Temperature compensated reference voltage circuit |
| 01/29/2004 | WO2004010283A1 Method and apparatus for providing a supply voltage based on an envelope of a radio frequency signal |
| 01/29/2004 | WO2003033749A3 Matrix element precharge voltage adjusting apparatus and method |
| 01/29/2004 | WO2003020546A8 Rf-power amplifier |
| 01/29/2004 | WO2002043239A3 Feed forward amplifier |
| 01/29/2004 | US20040019466 Microarray performance management system |
| 01/29/2004 | US20040017257 Apparatus and method for compensating pre-distortion of a power amplifier |
| 01/29/2004 | US20040017256 Linearization apparatus capable of adjusting peak-to-average power ratio |
| 01/29/2004 | US20040017253 Feedforward amplifier |
| 01/29/2004 | US20040017251 Method and apparatus for providing a supply voltage based on an envelope of a radio frequency signal |
| 01/29/2004 | DE10231181A1 Verstärkerschaltung mit einstellbarer Verstärkung und Sendeanordnung mit der Verstärkerschaltung Amplifier circuit with adjustable gain and transmitter arrangement having the amplifier circuit |
| 01/29/2004 | DE10231156A1 Schaltung zum Liefern einer Basis-Betriebsspannung für einen Bipolartransistor und Verstärkerschaltung Circuit for providing a base operating voltage for a bipolar transistor and amplifier circuit |
| 01/28/2004 | EP1384317A1 A signal processing circuit |
| 01/28/2004 | EP1384316A1 Device for controlling a closed circuit current for an amplification transistor and amplification circuit |
| 01/28/2004 | EP1384315A2 Device for controlling a closed circuit current for an amplifier transistor and amplifier circuit |
| 01/28/2004 | EP1384312A1 Tunable voltage controlled oscillator |
| 01/28/2004 | EP1384286A1 Inverted-f ferroelectric antenna |
| 01/28/2004 | EP1384285A1 Ferroelectric antenna and method for tuning same |
| 01/28/2004 | EP0835559B1 Non-linearity estimation method and device |
| 01/28/2004 | CN1136665C Programmable linear receiver and method for providing programmable linear in receiver |
| 01/28/2004 | CN1136529C Signal amplifier and image display |
| 01/27/2004 | US6684064 Dynamic bias for RF power amplifiers |
| 01/27/2004 | US6683557 Technique for changing a range gate and radar for coverage |
| 01/27/2004 | US6683514 Switched capacitor circuit |
| 01/27/2004 | US6683500 Auto bias circuit for power amplifier using power MOSFET |
| 01/27/2004 | US6683499 Divided-voltage fet power amplifiers |
| 01/27/2004 | US6683497 MOS linear transconductance amplifier |
| 01/27/2004 | US6683496 System and method for minimizing dissipation in RF power amplifiers |
| 01/27/2004 | US6683495 Reduced architecture for multibranch feedforward power amplifier linearizers |
| 01/27/2004 | US6683492 Circuits with dynamic biasing |
| 01/27/2004 | US6683484 Combined differential and single-ended input buffer |
| 01/22/2004 | WO2004008631A1 Circuit for supplying a base operating voltage for a bipolar transistor and amplifying circuit |
| 01/22/2004 | WO2004008630A2 Amplifying circuit with adjustable amplification and transmitter system comprising such an amplifying circuit |
| 01/22/2004 | WO2003005566A3 Low-noise amplifying circuit |
| 01/22/2004 | US20040014437 Device and method for pre-treating a signal to be transmitted using a non-linear amplifier with an upstream band-pass filter |
| 01/22/2004 | US20040013206 Digital I/Q modulator having a predistortion |
| 01/22/2004 | US20040012451 Tunable negative resistance device |
| 01/22/2004 | US20040012445 High frequency power amplifier module and wireless communication system |
| 01/22/2004 | US20040012444 Lineariser |
| 01/22/2004 | US20040012443 Linearization method and amplifier arrangement |
| 01/22/2004 | US20040012434 Process for controlling the impedance of an output amplification semiconductor device and corresponding output amplifying device |
| 01/21/2004 | EP1383238A1 Tunable negative resistance device |
| 01/21/2004 | EP1383235A1 Method and apparatus for operating a transmission amplifier |
| 01/21/2004 | EP1382141A1 Power division multiplexing with incoherent signals and fixed power hierarchy |