| Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008) |
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| 03/10/2004 | CN1481609A Power amplifier and communication appts |
| 03/10/2004 | CN1481608A 功率放大器 PA |
| 03/10/2004 | CN1481073A Power amplifier containing distributed capacitance |
| 03/10/2004 | CN1481018A Power amplifier with vadiator |
| 03/10/2004 | CN1480919A Level regulator |
| 03/10/2004 | CN1141788C Variable-gain amplifier |
| 03/09/2004 | US6704560 Low-voltage transconductance amplifier/filters |
| 03/09/2004 | US6704551 Calibration of in-phase and quadrature transmit branches of a transmitter |
| 03/09/2004 | US6704365 Data transmission driver device |
| 03/09/2004 | US6703900 Fast, stable overload recovery circuit and method |
| 03/09/2004 | US6703899 Quad switched gain circuit |
| 03/09/2004 | US6703898 Differential amplifier comprising an unlocking device |
| 03/09/2004 | US6703864 Buffer circuit |
| 03/09/2004 | US6703815 Low drop-out regulator having current feedback amplifier and composite feedback loop |
| 03/09/2004 | US6703682 High sheet MOS resistor method and apparatus |
| 03/04/2004 | WO2004019487A1 Digital amplification device |
| 03/04/2004 | WO2004019483A2 Providing dc isolation in switching amplifiers |
| 03/04/2004 | WO2004004115A9 Circuitry and method to provide a high speed comparator for an input stage of a low-voltage differential signal receiver circuit |
| 03/04/2004 | WO2002027942A3 Input voltage offset calibration of an analog device using a microcontroller |
| 03/04/2004 | US20040043750 LPA shelf and LPA type switching method for a mobile communication base station |
| 03/04/2004 | US20040043742 System and method for establishing a bias current using a feedback loop |
| 03/04/2004 | US20040041658 Microwave power amplifier |
| 03/04/2004 | US20040041634 High-frequency power amplifier |
| 03/04/2004 | US20040041633 System to reduce unwanted oscillations in high speed, high gain or transimpedance amplifiers |
| 03/04/2004 | US20040041632 Reconfigurable broadband active power splitter ditto power combiner and ditto bidirectional power splitter/power combiner and circuits based on these |
| 03/04/2004 | US20040041631 Class-A amplifier circuit having output voltage varied according to input voltage |
| 03/04/2004 | US20040041627 Doherty amplifier |
| 03/04/2004 | US20040041626 Digital power amplifier |
| 03/04/2004 | US20040041625 Differential amplifier common mode noise compensation |
| 03/04/2004 | US20040041593 Current mode logic family with bias current compensation |
| 03/04/2004 | DE10337268A1 Hocheffizienter Leistungsverstärker High-efficiency power amplifier |
| 03/03/2004 | EP1394954A2 Transmitter |
| 03/03/2004 | EP1394938A1 Circuit and method for switching gains of preamplifier |
| 03/03/2004 | EP1394935A1 Switching circuit and digital power amplifier |
| 03/03/2004 | EP1394934A2 Digital power amplifier |
| 03/03/2004 | EP1394933A2 A transimpedance amplifier and offset correction mechanism and method for lowering noise |
| 03/03/2004 | EP1394932A1 Doherty Amplifier |
| 03/03/2004 | EP1394649A2 Band gap circuit |
| 03/03/2004 | EP1393438A1 Linearized switch-based power amplifier |
| 03/03/2004 | EP1393437A2 Method and apparatus for compensation of second order distortion |
| 03/03/2004 | EP1393403A2 Tunable phase shifter and applications for same |
| 03/03/2004 | EP1392195A2 Integrated low-corner frequency high pass filter circuit |
| 03/03/2004 | EP1192711B1 Biasing circuit for vgs drift compensation and thermal compensation of a power device |
| 03/03/2004 | EP1004165B1 Active operating point regulation for power amplifiers |
| 03/03/2004 | EP0962120B1 High-fidelity and high-efficiency analog amplifier combined with digital amplifier |
| 03/03/2004 | EP0941575B1 Efficient parallel-stage power amplifier |
| 03/03/2004 | EP0903009A4 Hybrid matrix amplifier with noise reduction |
| 03/03/2004 | CN1479970A Driver for external FET with high accuracy and gate voltage protection |
| 03/03/2004 | CN1479969A Class E/F switching power amplifiers |
| 03/03/2004 | CN1479552A 多赫尔蒂放大器 Doherty amplifier |
| 03/03/2004 | CN1479543A Linear power amplifier rack of mobile communication base station and its switchover method of the type |
| 03/03/2004 | CN1479447A Amplifier common-mode feedback system used for switch capacitor structure |
| 03/03/2004 | CN1140962C Operating amplifier with current feedback |
| 03/02/2004 | US6701138 Power amplifier control |
| 03/02/2004 | US6701134 Increased dynamic range for power amplifiers used with polar modulation |
| 03/02/2004 | US6700814 Sense amplifier bias circuit for a memory having at least two distinct resistance states |
| 03/02/2004 | US6700803 Systems and methods for pulse width modulation |
| 03/02/2004 | US6700721 Magnetic recording and reproducing apparatus and semiconductor integrated circuit for use in the same comprising a read/write signal processor having an interleave write data generator |
| 03/02/2004 | US6700522 Signal settling device and method |
| 03/02/2004 | US6700518 Digital switching amplifier |
| 03/02/2004 | US6700445 Filter circuits based on trans-conductor circuits |
| 03/02/2004 | US6700444 N-way RF power amplifier with increased backoff power and power added efficiency |
| 03/02/2004 | US6700443 Reduction of sensitivity of an amplifier to an offset voltage |
| 03/02/2004 | US6700442 N way phase cancellation power amplifier |
| 03/02/2004 | US6700440 High frequency power amplifier |
| 03/02/2004 | US6700439 Zero-bias bypass switch |
| 03/02/2004 | US6700422 Apparatus for increasing slew rate |
| 03/02/2004 | US6700417 Sampling and hold circuit |
| 02/26/2004 | WO2004017527A2 High bandwidth magnetically isolated signal transmission circuit |
| 02/26/2004 | WO2004017526A2 Power regulator for intermittent use of traveling wave tube amplifiers in communications satellites |
| 02/26/2004 | WO2004017514A1 Operational amplifier |
| 02/26/2004 | WO2004017513A1 Amplifier |
| 02/26/2004 | WO2004017512A1 High power doherty amplifier |
| 02/26/2004 | WO2004017153A1 Band-gap reference circuit |
| 02/26/2004 | WO2003096525A3 Polyphase impedance transformation amplifier |
| 02/26/2004 | WO2003081833B1 Floating-gate analog circuit |
| 02/26/2004 | WO2003019774A3 High frequency power amplifier circuit |
| 02/26/2004 | WO2002052723A3 High-efficiency solid state power amplifier |
| 02/26/2004 | US20040038696 Transmitter |
| 02/26/2004 | US20040038662 Reducing active mixer flicker noise |
| 02/26/2004 | US20040037364 Device for producing a phase and amplitude modulated radio frequency signal |
| 02/26/2004 | US20040036665 Drive circuit for liquid crystal displays and method therefor |
| 02/26/2004 | US20040036537 Amplifier circuit, an optical communication system and a method of controlling amplification |
| 02/26/2004 | US20040036536 Transimpedance amplifier and offset correction mechanism and method for lowering noise |
| 02/26/2004 | US20040036535 Operational amplifying circuit and push-pull circuit |
| 02/26/2004 | US20040036534 Wideband CMOS gain stage |
| 02/26/2004 | US20040036533 Providing DC isolation in switching amplifiers |
| 02/26/2004 | US20040036531 Amplification circuitry |
| 02/26/2004 | US20040036529 Triangular wave generating circuit used in a Class-D amplifier |
| 02/26/2004 | US20040036523 Two-input/two-output broadband active selector switch with distributed structure, and phase control device comprising such a switch |
| 02/26/2004 | US20040036453 Fully differential reference driver for pipeline analog to digital converter |
| 02/25/2004 | EP1391987A1 Reflection loss suppression circuit |
| 02/25/2004 | EP1391986A1 Multi-band amplifier |
| 02/25/2004 | EP1391985A2 Wideband cmos gain stage |
| 02/25/2004 | EP1391137A1 Apparatus for electric to acoustic conversion |
| 02/25/2004 | EP1391046A2 Non-linear transistor circuits with thermal stability |
| 02/25/2004 | EP1391034A2 Distributed amplifier with transistors having negative feedback |
| 02/25/2004 | EP1250754B1 Non-linear signal processor |
| 02/25/2004 | EP1010240A4 Class d amplifier with switching control |
| 02/25/2004 | EP0846367B1 Bridge amplifier with feedback over the load |