| 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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| 05/03/2000 | EP0996996A2 A high speed and high gain operational amplifier |
| 05/02/2000 | US6057737 Non-linear asymmetrical audio amplifiers |
| 05/02/2000 | US6057734 Symmetrical analog power amplifier |
| 05/02/2000 | US6057733 Feedforward multicarrier linear RF power amplifier |
| 04/30/2000 | CA2281209A1 Feedforward amplifier and method of amplifying signals |
| 04/27/2000 | WO2000024124A1 Dual-band, dual-mode power amplifier with reduced power loss |
| 04/26/2000 | EP0996225A1 Amplifier with feedforward loops for rejecting non-linear distortion |
| 04/26/2000 | EP0996224A1 Amplification system having mask detection and bias compensation |
| 04/26/2000 | EP0996223A1 Amplification system having mask detection |
| 04/26/2000 | EP0996222A1 Feedforward amplification system having mask detection compensation |
| 04/26/2000 | EP0995261A1 Adaptive biasing in a power amplifier |
| 04/26/2000 | CN1251697A Pulse referenced control method for enhance power amplification of pulse modulated signal |
| 04/25/2000 | US6055418 Computer program product configured to control modular transmission system components |
| 04/25/2000 | US6054976 Signal amplifier, signal amplifier circuit, signal line drive circuit and image display device |
| 04/25/2000 | US6054901 Low noise preamplifier |
| 04/25/2000 | US6054897 Differential amplifier constituted of bipolar transistors |
| 04/25/2000 | US6054896 Controller and associated methods for a linc linear power amplifier |
| 04/25/2000 | US6054895 Apparatus and method for pre-distortion correction of a power amplifier stage |
| 04/25/2000 | US6054894 Digital control of a linc linear power amplifier |
| 04/25/2000 | US6054887 Offset voltage correction circuit |
| 04/25/2000 | US6054880 Circuit with high-voltage output stage |
| 04/20/2000 | WO2000022726A1 Non-linear asymmetrical audio amplifiers |
| 04/20/2000 | DE19847828A1 Cascade amplifier for cable television signals, has two spaced active regions for providing transistor cells, respectively, having transistors in common emitter and common base configuration |
| 04/20/2000 | DE19842305A1 Linear operational transconductance amplifier, has input element and load element acting as controlled current source and end stage transistor controlled by output signal from difference voltage amplifier |
| 04/20/2000 | DE19834209C1 Verstärkerausgangsstufe Amplifier output stage |
| 04/19/2000 | EP0994402A1 Current mirror |
| 04/19/2000 | CN1250976A Power amplifier having monitoring and circuit protection |
| 04/19/2000 | CN1250897A Synchronous testing check technology used for control system |
| 04/19/2000 | CA2286542A1 Amplification system having mask detection |
| 04/19/2000 | CA2286540A1 Amplification system using baseband mixer |
| 04/18/2000 | US6052559 Thermoelectrically cooled low noise amplifier and method |
| 04/18/2000 | US6052033 Radio frequency amplifier system and method |
| 04/18/2000 | US6052032 Radio frequency amplifiers |
| 04/18/2000 | US6052029 Stabilizing circuit and amplifier |
| 04/18/2000 | US6052027 Wideband operational amplifier having a plurality of feedback loops |
| 04/18/2000 | US6052023 Calibration system for feed forward distortion reduction system |
| 04/18/2000 | US6051965 Two-terminal paired circuit |
| 04/13/2000 | WO2000021202A1 Transmission power amplifier for a mobile telephone |
| 04/13/2000 | WO2000021192A1 Amplifier apparatus with transient recovery aid |
| 04/13/2000 | WO2000003474A3 Converter circuit and variable gain amplifier with temperature compensation |
| 04/13/2000 | DE19846069A1 Sendeendstufe für ein Mobiltelefon Transmitter output stage for a mobile phone |
| 04/13/2000 | DE19845281A1 High frequency amplifier circuit with overvoltage protection arrangement, has transistor protection circuit after overvoltage protection tapping with normally off transistors |
| 04/12/2000 | EP0992871A2 CMOS circuit for generating a current reference |
| 04/12/2000 | EP0710411A4 A method for a transmitter to compensate for varying loading without an isolator |
| 04/12/2000 | CN1250254A Scanning pilot technology using for distorted control system generated by reducing circuit |
| 04/12/2000 | CN1250252A Transmitting installation and its method |
| 04/12/2000 | CN1250251A Double-side band pilot technology using for distorted control system generated from reducing circuit |
| 04/12/2000 | CN1250250A Predistorter of amplifier and amplifier unit |
| 04/12/2000 | CN1250247A Frequency hopping and pilot frequency technology using for control sytsem for distortion generated from reducing circuit |
| 04/12/2000 | CN1051417C 无线电系统 Radio Systems |
| 04/11/2000 | US6049703 Amplifier circuit and method for increasing linearity of the amplifier circuit |
| 04/11/2000 | US6049253 Operational amplifier |
| 04/11/2000 | US6049248 Method and apparatus for generating a driver signal for use by a non-linear class S amplifier for producing linear amplification |
| 04/11/2000 | US6049200 Voltage regulator capable of lowering voltage applied across phase compensating capacitor |
| 04/06/2000 | WO2000019604A1 Linear transconductance circuits having class ab amplifiers parallel coupled with concave compensation circuits |
| 04/06/2000 | WO2000019603A1 Apparatus and method for improving power control loop linearity |
| 04/06/2000 | WO2000019602A1 Method and apparatus for base transceiver station cold starts |
| 04/06/2000 | WO2000019601A1 Circuit arrangement for stabilizing the operating point of a transistor |
| 04/06/2000 | WO2000019572A1 Monitoring output power to protect a power amplifier |
| 04/06/2000 | WO2000018294A1 Methods, systems, and associated implantable devices for dynamic monitoring of tumors |
| 04/05/2000 | EP0991210A2 Double side band pilot technique for a control system that reduces distortion produced by electrical circuits |
| 04/05/2000 | EP0991183A2 Frequency hop pilot technique for a control system that reduces distortion produced by electrical circuits |
| 04/05/2000 | EP0991182A2 Sweep pilot technique for a control system that reduces distortion produced by electrical circuits |
| 04/05/2000 | CN1249566A Improved circuit of feedforward amplifier incorporated in automatic gain and phase controller |
| 04/04/2000 | US6046642 Amplifier with active bias compensation and method for adjusting quiescent current |
| 04/04/2000 | US6046641 Parallel HV MOSFET high power stable amplifier |
| 04/04/2000 | US6046640 Switched-gain cascode amplifier using loading network for gain control |
| 04/04/2000 | US6046637 Feedforward amplifier |
| 04/04/2000 | US6046636 Device for amplifying signals |
| 04/04/2000 | US6046635 Dynamic predistortion compensation for a power amplifier |
| 04/04/2000 | US6046634 Amplifier circuit employing floating error cancellation |
| 04/04/2000 | US6046481 Transistor for preventing a thermal runaway caused by temperature rise in a bias circuit of the transistor |
| 04/04/2000 | CA2206619C Feed forward amplifier system and method |
| 03/30/2000 | WO2000018005A1 High efficiency switched gain power amplifier |
| 03/30/2000 | WO2000018004A1 High efficiency switched gain power amplifier |
| 03/30/2000 | WO2000018003A1 A method and arrangement for measuring temperature in an intermittently operating semiconductor |
| 03/30/2000 | CA2345089A1 High efficiency switched gain power amplifier |
| 03/29/2000 | EP0989673A2 Low power digital input circuit |
| 03/29/2000 | EP0988694A1 Dynamic predistortion compensation for a power amplifier |
| 03/29/2000 | EP0988693A1 Error extraction using autocalibrating rf correlator |
| 03/29/2000 | CN1249080A Combined linear power amplifying device and method |
| 03/29/2000 | CN1249078A Flexible current control in power amplifiers |
| 03/28/2000 | US6043714 Power amplifier incorporating heterojunction and silicon bipolar transistors |
| 03/28/2000 | US6043713 Amplifier with temperature compensation function |
| 03/28/2000 | US6043712 Linear power amplifier |
| 03/28/2000 | US6043711 Gate bias circuit of a power amplifier FET |
| 03/28/2000 | US6043710 Low-voltage amplifiers |
| 03/28/2000 | US6043707 Method and apparatus for operating a radio-frequency power amplifier as a variable-class linear amplifier |
| 03/28/2000 | US6043706 Methods and apparatus for controlling power amplifier quiescent current in a wireless communication device |
| 03/28/2000 | US6043570 Driving circuit for capacitive load |
| 03/23/2000 | WO2000016475A1 In-line, unbalanced amplifier, pre-distortion circuit |
| 03/23/2000 | WO2000016474A1 Method and apparatus for preventing power amplifier saturation |
| 03/23/2000 | WO2000016473A1 Apparatus and method for linear power amplification |
| 03/23/2000 | WO2000001063A3 A variable gain amplifier using impedance network |
| 03/22/2000 | EP0987819A2 Automatic gain control circuit, receiving apparatus incorporating said circuit, automatic gain control method adaptable to receiving apparatus and recording medium |
| 03/22/2000 | EP0987817A1 Method and apparatus for improving efficiency of high-power linear amplifier |
| 03/22/2000 | CN1248094A Automatic gain control circuit, method, receiver and recording medium thereof |
| 03/22/2000 | CN1050720C Communication apparatus utilizing high power amplifier |
| 03/22/2000 | CN1050718C Solid state tube compression circuit |
| 03/21/2000 | US6041416 Circuit for reducing audio amplifier noise during powering on and off |