| Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008) |
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| 12/18/2003 | US20030231048 Driver for an external FET with high accuracy and gate voltage protection |
| 12/18/2003 | US20030231033 Driver circuit connected to a switched capacitor and method of operating same |
| 12/17/2003 | EP1372260A2 Output signal converter for tube amplifiers |
| 12/17/2003 | EP1371134A2 High-frequency amplifier circuit having a directly-connected bias circuit |
| 12/17/2003 | CN2593464Y Current mode transconductance linear audio-frequency amplifier |
| 12/17/2003 | CN1462504A High efficiency switching amplifiers |
| 12/17/2003 | CN1131588C 功率放大器 PA |
| 12/16/2003 | US6665525 High-level modulation method and apparatus |
| 12/16/2003 | US6665338 Circuitry for converting a sampled digital signal to a naturally sampled digital signal and method therefor |
| 12/16/2003 | US6664941 Amplifier circuit and liquid-crystal display unit using the same |
| 12/16/2003 | US6664912 Preamplifier with improved CMRR and temperature stability and associated amplification method |
| 12/16/2003 | US6664858 Adjustable peaking capacitor in high-speed optical fiber communication receiver |
| 12/16/2003 | US6664856 Circuit configuration for setting the operating point of a radiofrequency transistor and amplifier circuit |
| 12/16/2003 | US6664855 MMIC driver amplifier having zig-zag RF signal flow |
| 12/16/2003 | US6664854 Base band filter including a semiconductor integrated circuit |
| 12/16/2003 | US6664853 Wide-bandwidth differential signal amplifier |
| 12/16/2003 | US6664851 Selectable single mode or differential mode operation in a single amplifier |
| 12/16/2003 | US6664842 FET active load and current source |
| 12/16/2003 | US6664840 Offset calibration system and method for a high gain signal channel |
| 12/16/2003 | US6664609 Stray capacity between the first emitter wiring and the second emitter wiring can be reduced |
| 12/11/2003 | WO2003103162A1 Transmitter and wireless communication apparatus using the transmitter |
| 12/11/2003 | WO2003103149A2 Apparatus for detecting the envelope of rf power signals |
| 12/11/2003 | WO2003103141A1 Differential amplifier, two-stage amplifier having that differential amplifier, and analog/digital converter having that two-stage amplifier |
| 12/11/2003 | WO2003103140A1 Analog buffer circuit, display device and mobile terminal |
| 12/11/2003 | WO2003103139A1 Feedback amplifier having amplified signal path and feedback signal path separated |
| 12/11/2003 | WO2003103138A1 Transresistance amplifier for a charged particle detector |
| 12/11/2003 | WO2003103137A1 Amplification device |
| 12/11/2003 | WO2003103133A2 High frequency amplifier in an integrated circuit |
| 12/11/2003 | WO2003103109A2 Power amplifiers |
| 12/11/2003 | WO2002084863A3 Distributed amplifier with transistors having negative feedback |
| 12/11/2003 | WO2002075921A3 Distributed amplifier having separately biased sections |
| 12/11/2003 | US20030228852 Semiconductor integrated circuit device and wireless communication system |
| 12/11/2003 | US20030228024 Shock sound prevention circuit |
| 12/11/2003 | US20030227756 Temperature characteristic compensation apparatus |
| 12/11/2003 | US20030227330 RF power amplifier employing bias circuit topologies for minimization of RF amplifier memory effects |
| 12/11/2003 | US20030227328 Fast, stable overload recovery circuit and method |
| 12/11/2003 | US20030227327 High switching speed differential amplifier |
| 12/11/2003 | US20030227326 All digital transistor high gain operational amplifier using positive feedback technique |
| 12/11/2003 | US20030227317 Circuit arrangement for a current-controlled resistor having an enlarged linear range |
| 12/11/2003 | US20030227303 LVDS driver in bipolar and MOS technology |
| 12/10/2003 | EP1370008A1 Mobile transceiver front-end |
| 12/10/2003 | EP1369993A1 LVDS-driver in bipolar and MOS technology |
| 12/10/2003 | EP1369992A2 Amplifier and radio frequency tuner |
| 12/10/2003 | EP1369991A2 Power amplifier |
| 12/10/2003 | EP1368891A2 Iq modulator |
| 12/10/2003 | CN2591868Y High-tone quality power amplifier for car use |
| 12/10/2003 | CN1461521A High duty cycle offset compensation for operational amplifiers |
| 12/10/2003 | CN1461520A FET band amplifier |
| 12/10/2003 | CN1461519A FET band amplifier |
| 12/10/2003 | CN1461431A Amplifier system with on-demand power supply boost |
| 12/10/2003 | CN1130820C Buffer amplifying return circuit |
| 12/10/2003 | CN1130819C Apparatus and method of linearizing power amplifier mobile radio communication system |
| 12/10/2003 | CN1130818C Method and device for intermodulation compensation in multi-channel amplifiers |
| 12/09/2003 | US6661311 Electric apparatus comprising a shield and transmission means with filtering of an electric signal on both sides of the shield |
| 12/09/2003 | US6661290 High-frequency power amplifier |
| 12/09/2003 | US6661289 Voltage-to-current conversion circuit and OTA using the same |
| 12/09/2003 | US6661288 Apparatus for effecting high speed switching of a communication signal |
| 12/09/2003 | US6661285 Power efficient capacitive load driving device |
| 12/09/2003 | US6661284 Method and apparatus for error compensation in a hybrid matrix amplification system |
| 12/09/2003 | US6661283 Wide gain range and fine gain step programmable gain amplifier with single stage switched capacitor circuit |
| 12/04/2003 | WO2003100978A1 Phase-locked loop circuit |
| 12/04/2003 | WO2003100967A1 Fast cascaded class ab output stage with fet devices |
| 12/04/2003 | WO2003100965A2 High speed amplifier incorporating pre-emphasis |
| 12/04/2003 | WO2003081769A3 Activity detector circuit |
| 12/04/2003 | WO2003005574A3 A communication system and arrangements comprising such a communication system |
| 12/04/2003 | WO2002075786A3 Bond wire tuning of rf power transistors and amplifiers |
| 12/04/2003 | US20030224743 Apparatus for radio telecommunication system and method of building up output power |
| 12/04/2003 | US20030223595 Shock sound prevention circuit |
| 12/04/2003 | US20030223589 Method for converting two-channel audio system into multichannel audio system and an audio processor thereof |
| 12/04/2003 | US20030222719 Asymmetric, voltage optimized, wideband common-gate bi-directional mmic amplifier |
| 12/04/2003 | US20030222718 Fast cascaded class AB MOS output stage |
| 12/04/2003 | US20030222717 Variable gain amplifier having improved gain slope characteristic and linearity |
| 12/04/2003 | US20030222716 Operational transconductance amplifier and AGC amplifier using the same |
| 12/04/2003 | US20030222715 Operational amplifier with increased common mode input range |
| 12/04/2003 | US20030222713 Modulation scheme for switching amplifiers to reduce filtering requirements and crossover distortion |
| 12/04/2003 | US20030222711 Amplifier and radio frequency tuner |
| 12/04/2003 | US20030222709 High efficiency power amplifier |
| 12/04/2003 | US20030222705 Output circuit device for clock signal distribution in high-speed signal transmission |
| 12/04/2003 | US20030222696 DC offset cancellation circuit, differential amplification circuit with DC offset cancellation circuit, photo-electric pulse conversion circuit, pulse shaping circuit, and pulse generation circuit |
| 12/04/2003 | US20030222681 Comparator |
| 12/03/2003 | EP1367712A2 Amplifier and radio frequency tuner |
| 12/03/2003 | EP1367704A2 Modulation scheme for switching amplifiers to reduce filtering requirements and crossover distortion |
| 12/03/2003 | EP1366565A2 Dynamic allocation of power supplied by a power supply and frequency agile spectral filtering of signals |
| 12/03/2003 | EP1366562A2 Amplitude and phase modulator |
| 12/03/2003 | EP1131886A4 Multi-reference, high-accuracy switching amplifier |
| 12/03/2003 | EP1119918B1 Transmission power amplifier for a mobile telephone |
| 12/03/2003 | EP0935846B1 Pulse modulation power amplifier with enhanced cascade control method |
| 12/03/2003 | CN1460324A Balanced transformer-less amplifier and offset detection and correction system therefor |
| 12/03/2003 | CN1459926A Power amplifier capable of inhibiting noise power of receiving band and gain switching |
| 12/03/2003 | CN1459925A High-frequency circuit and mfg. method thereof |
| 12/03/2003 | CN1459924A High linearity complementary metal oxid semiconductor transduction circuit |
| 12/03/2003 | CN1130013C Film acoustic wave device and mfg. method thereof |
| 12/02/2003 | US6658244 Method and circuit for compensation control of offset voltages in a radio receiving circuit integrated in a circuit module |
| 12/02/2003 | US6658238 Method for elaborating a transmission signal and transmitter with amplifying cells for implementing same |
| 12/02/2003 | US6658115 Method and apparatus for high fidelity wireless stereophonic transmission |
| 12/02/2003 | US6657566 Conversion of a PCM signal into a UPWM signal |
| 12/02/2003 | US6657503 High noise rejection voltage-controlled ring oscillator architecture |
| 12/02/2003 | US6657498 Variable gain low-noise amplifier for a wireless terminal |
| 12/02/2003 | US6657497 Asymmetric, voltage optimized, wideband common-gate bi-directional MMIC amplifier |
| 12/02/2003 | US6657496 Amplifier circuit with regenerative biasing |