| 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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| 05/19/2005 | US20050104661 Differential amplifier |
| 05/19/2005 | US20050104658 Distortion compensating amplifier device, amplifier system, and wireless base station |
| 05/19/2005 | US20050104656 Amplifier |
| 05/19/2005 | US20050104652 Bias current generating circuit, laser diode driving circuit, and optical communication transmitter |
| 05/19/2005 | US20050104087 InGaP pHEMT device for power amplifier operation over wide temperature range |
| 05/18/2005 | CN1618178A Power amplification apparatus of portable terminal |
| 05/18/2005 | CN1618167A Switched mode power amplifier |
| 05/18/2005 | CN1617442A Closed loop amplification with high throughput performance |
| 05/18/2005 | CN1617440A Power amplification circuit |
| 05/18/2005 | CN1617419A Vehicle mounted charger and hand-free device combined circuit |
| 05/18/2005 | CN1202615C Electronic apparatus comprising an audio-frequency amplifier and method for controlling said electronic apparatus |
| 05/17/2005 | US6895227 Transmission output stage for a mobile telephone |
| 05/17/2005 | US6895096 Microchannel plate audio amplifier |
| 05/17/2005 | US6894573 Tunable negative resistance device |
| 05/17/2005 | US6894568 Transimpedance amplifier with receive signal strength indicator |
| 05/17/2005 | US6894567 ESD protection circuit for use in RF CMOS IC design |
| 05/17/2005 | US6894566 Active load device that enables biasing of a very wide band distributed amplifier circuit with gain control |
| 05/17/2005 | US6894565 Fast settling power amplifier regulator |
| 05/17/2005 | US6894562 High-frequency amplifier, feed-forward amplifier and distortion compensating amplifier |
| 05/17/2005 | US6894561 Efficient power control of a power amplifier by periphery switching |
| 05/17/2005 | US6894559 Modulated power supply |
| 05/17/2005 | US6893101 Active element bias circuit for RF power transistor input |
| 05/17/2005 | CA2371792C Method and apparatus for linear amplification of a radio frequency signal |
| 05/12/2005 | WO2005043749A1 Techniques to lower drive impedance and provide reduced dc offset |
| 05/12/2005 | WO2005010780A3 Symbolic analysis of electrical circuits for application in telecommunications |
| 05/12/2005 | US20050101263 Power control in a mobile communication system |
| 05/12/2005 | US20050101258 Distortion compensation apparatus |
| 05/12/2005 | US20050101254 Distortion compensating amplifier |
| 05/12/2005 | US20050100177 Mute circuit of an audio device for suppressing audio signals during transients of power switching |
| 05/12/2005 | US20050099230 LMS-based adaptive pre-distortion for enhanced power amplifier efficiency |
| 05/12/2005 | US20050099228 Portable power amplifier |
| 05/12/2005 | US20050099222 Electronically programmable multimode circuit |
| 05/12/2005 | US20050099212 Driver circuit with frequency-dependent signal feedback |
| 05/12/2005 | DE112004000016T5 Logischer, rauscharmer Verstärker und Verstärkungssteuerverfahren davon Logically, low-noise amplifier and gain control method thereof |
| 05/11/2005 | EP1530303A1 Power control in a mobile communication system |
| 05/11/2005 | EP1530288A1 Power amplification circuit |
| 05/11/2005 | EP1529570A2 Switched resonant power amplifier system for an ultrasonic device |
| 05/11/2005 | EP1529341A2 Ring triggered mute |
| 05/11/2005 | EP1529339A2 Intermodulation product cancellation circuit |
| 05/11/2005 | CN1615578A Improvements in or relating to power amplifiers |
| 05/11/2005 | CN1615577A Method and apparatus for compensation of cross modulation effects |
| 05/11/2005 | CN1201482C RF power amplifier having high power added efficiency |
| 05/11/2005 | CN1201481C Amplifier for mobile phone |
| 05/10/2005 | US6891439 Circuit and a method for controlling the bias current in a switched capacitor circuit |
| 05/10/2005 | US6891438 Adaptive active bias compensation technique for power amplifiers |
| 05/10/2005 | US6891437 Current amplifier structure |
| 05/10/2005 | US6891432 Apparatus, methods and articles of manufacture for electromagnetic processing |
| 05/06/2005 | WO2005041405A1 Split band amplifier |
| 05/06/2005 | WO2005041404A1 Efficient power supply for rapidily changing power requirements |
| 05/06/2005 | WO2005040043A2 Transducer preamplifier and coupling device |
| 05/06/2005 | WO2005029875A3 Digital convertible radio snr optimization |
| 05/06/2005 | WO2004112235A3 Method and system for transmitting signals with reduced spurious emissions |
| 05/05/2005 | US20050095998 Tunable matching circuit |
| 05/05/2005 | US20050093724 Comparator |
| 05/05/2005 | US20050093633 Power amplifier output stage with multiple power states and improved efficiency |
| 05/05/2005 | US20050093627 Linearity enhanced power amplifier stage |
| 05/05/2005 | US20050093622 Method, circuit and power amplifier for detecting a fault, and method of protecting a circuit in a power amplifier from a fault occurrence |
| 05/04/2005 | EP1528779A1 System and method for frequency modulation in a modem |
| 05/04/2005 | EP1528678A2 Comparator |
| 05/04/2005 | EP1528668A2 Amplifier and frequency converter |
| 05/04/2005 | EP1528667A2 Variable amplifier and mobile wireless terminal using same |
| 05/04/2005 | EP1528666A1 Power amplifier circuit configuration and integrated circuit |
| 05/04/2005 | EP1476949A4 Power amplification apparatus of portable terminal |
| 05/04/2005 | EP1470636A4 N-way rf power amplifier with increased backoff power and power added efficiency |
| 05/04/2005 | CN2697947Y Multi-purpose antenna amplifier |
| 05/04/2005 | CN1613178A Amplifier with bias compensation using a current mirror circuit |
| 05/04/2005 | CN1612468A 差动放大器 Differential amplifier |
| 05/04/2005 | CN1612466A 比较器 Comparators |
| 05/04/2005 | CN1612465A High-frequency power amplifier |
| 05/04/2005 | CN1612002A Output circuit, digital analog circuit and display device |
| 05/04/2005 | CN1200510C Feedback type amplifying circuit and driving circuit |
| 05/04/2005 | CN1200509C Digital linearizator of high-power amplifier |
| 05/03/2005 | US6889037 Reducing active mixer flicker noise |
| 05/03/2005 | US6889036 Integrated frequency selectable resonant coupling network and method thereof |
| 05/03/2005 | US6888413 Frequency synthesizer using a VCO having a controllable operating point, and calibration and tuning thereof |
| 05/03/2005 | US6888410 Power amplifier having low gate oxide stress |
| 05/03/2005 | US6888404 Multicarrier amplifying device |
| 05/03/2005 | US6888396 Multi-cascode transistors |
| 04/30/2005 | CA2729743A1 Switched resonant ultrasonic power amplifier system |
| 04/30/2005 | CA2729742A1 Switched resonant ultrasonic power amplifier system |
| 04/28/2005 | WO2005039136A1 Modulating apparatus and modulating method |
| 04/28/2005 | WO2005039062A2 Amplifier with capacitor selection |
| 04/28/2005 | WO2005039046A1 Method and apparatus for resetting a buffer amplifier |
| 04/28/2005 | WO2005039044A1 Electronic circuit for amplification of a bipolar signal |
| 04/28/2005 | WO2005039043A1 Amplifier circuit |
| 04/28/2005 | WO2005039042A1 Non-linear circuit, radio communication device, and non-linear amplification method |
| 04/28/2005 | WO2005039041A1 Microphone preamplifier |
| 04/28/2005 | WO2005039040A1 Method and apparatus for realizing a low noise amplifier |
| 04/28/2005 | WO2005039039A2 Data signal amplifier and processor with multiple signal gains for increased dynamic signal range |
| 04/28/2005 | WO2004027827A3 Integrated circuit with automatic polarity detection and configuration |
| 04/28/2005 | WO2004001956A3 Forward amplifiers |
| 04/28/2005 | US20050090223 Use of a down-bond as a controlled inductor in integrated circuit applications |
| 04/28/2005 | US20050090210 Communication apparatus |
| 04/28/2005 | US20050090209 High linearity, high efficiency power amplifier with DSP assisted linearity optimization |
| 04/28/2005 | US20050088390 Differential amplifier |
| 04/28/2005 | US20050088329 Output circuit, digital analog circuit and display device |
| 04/28/2005 | US20050088263 High performance switch for switched inductor tuned RF circuit |
| 04/28/2005 | US20050088262 Tuning RF circuits using switched inductors |
| 04/28/2005 | US20050088242 Use of a thick oxide device as a cascode for a thin oxide transconductance device in MOSFET technology and its application to a power amplifier design |
| 04/28/2005 | US20050088240 Method and circuit for overload recovery of an amplifier |