| 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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| 04/11/2013 | WO2012154840A3 System providing switchable impedance transformer matching for power amplifiers |
| 04/11/2013 | US20130088296 Attenuating Noise and Cross-Talk in an Audio System by Offsetting Outputs In Phase |
| 04/11/2013 | US20130088291 Combined filter and transconductance amplifier |
| 04/10/2013 | EP2579458A1 Switching circuit and envelope signal amplifier |
| 04/10/2013 | EP2579457A1 Power amplifier for mobile telecommunications |
| 04/10/2013 | EP2579456A1 Control method for fast tracking power source, fast tracking power source and system |
| 04/10/2013 | EP2577855A2 Switched arrangement for switched mode supply |
| 04/10/2013 | CN202872737U True RMS (root mean square) - DC (direct current) converter high-temperature thick-film integrated circuit |
| 04/10/2013 | CN202872736U Linear power amplifier device of very high frequency (VHF) wave band |
| 04/10/2013 | CN202872734U Sub-woofer power amplifier with self-diagnosis function |
| 04/10/2013 | CN202872733U Power amplifier for digital television transmitter |
| 04/10/2013 | CN202872732U Novel amplifier |
| 04/10/2013 | CN202859112U Fetus electrocardio amplifying circuit based on AD 620 and OP 90 |
| 04/10/2013 | CN1968008B Amplifiers with compensation |
| 04/10/2013 | CN103039000A Predistortion of complex modulated waveform |
| 04/10/2013 | CN103036513A Linear power amplifying device |
| 04/10/2013 | CN103036512A Dynamic comparator with large offset voltage correction range |
| 04/10/2013 | CN103036511A ADC (analog-to-digital converter) allowance amplifying circuit of infrared focal plane array detector readout circuit |
| 04/10/2013 | CN103036510A 放大器 Amplifier |
| 04/10/2013 | CN103036509A Biasing circuit suitable for low noise amplifier |
| 04/10/2013 | CN103036508A High-speed low-crosstalk pre-amplifier, dynamic comparator and circuit |
| 04/10/2013 | CN102118334B Method and device for processing digital predistortion |
| 04/09/2013 | US8416956 Protected digital audio driver |
| 04/04/2013 | WO2013049843A1 Systems and methods for adaptive power amplifier linearization |
| 04/04/2013 | WO2013048936A1 Amplifying system |
| 04/04/2013 | WO2013048891A1 Digitally-scalable transformer combining power amplifier |
| 04/04/2013 | WO2013047947A1 Linear amplifier and multistage linear amplifier |
| 04/04/2013 | WO2013046354A1 Vehicle proximity notification device |
| 04/04/2013 | WO2013046183A1 Systems and methods for digital predistortion in a dual band transmitter |
| 04/04/2013 | WO2013011026A3 Amplifier arrangement |
| 04/04/2013 | US20130082782 Circuit and Power Amplifier |
| 04/04/2013 | US20130082775 Systems and Methods for Adaptive Power Amplifier Linearization |
| 04/04/2013 | US20130082774 Linearity power amplification device |
| 04/04/2013 | US20130082773 Linearization of power amplifiers through digital in-band predistortion followed by analog predistortion |
| 04/04/2013 | US20130082676 Fast-settling precision voltage follower circuit and method |
| 04/04/2013 | CA2821892A1 Systems and methods for digital predistortion in a dual band transmitter |
| 04/03/2013 | EP2575310A1 Method and device for digital baseband predistortion |
| 04/03/2013 | EP2360775B1 Transmission line, impedance transformer, integrated circuit mounted device, and communication device module |
| 04/03/2013 | CN202856692U Power amplification state detection circuit |
| 04/03/2013 | CN202856691U Control protection circuit of solid state microwave power amplifier |
| 04/03/2013 | CN202856690U Amplification module of amplifier used for cable television |
| 04/03/2013 | CN202856689U Cable television amplifier |
| 04/03/2013 | CN103026618A Amplifier |
| 04/03/2013 | CN103023443A Operational amplifier capable of automatically adjusting output resistance |
| 04/03/2013 | CN103023442A 限幅放大器及其方法 Limiting Amplifier and Method |
| 04/03/2013 | CN103023441A Bandwidth regulating method for radio frequency power amplifier and radio frequency power amplifier |
| 04/03/2013 | CN103023440A Circuit for improving linearity of power amplifier |
| 04/03/2013 | CN103023439A Power amplifying system for intelligent substation test system |
| 04/03/2013 | CN103023438A Audio distortion adjustment control equipment and audio distortion adjusting method |
| 04/03/2013 | CN103023437A Novel dynamic comparer capable of correcting offset voltage |
| 04/03/2013 | CN103023436A System and method for calibration of timing mismatch for envelope tracking transmit systems |
| 04/03/2013 | CN103022639A Antenna amplifier structure |
| 04/03/2013 | CN101807887B Class d amplifier |
| 04/03/2013 | CN101741322B Power amplifiers with discrete power control |
| 04/03/2013 | CN101494441B Wideband low noise amplifier |
| 04/03/2013 | CN101350596B Delay modulator pre-distortion circuit for an amplifier |
| 04/02/2013 | US8410850 Signal processing arrangement and signal processing method |
| 04/02/2013 | US8410846 Variable gain amplifier |
| 04/02/2013 | US8410843 Polyphase nonlinear digital predistortion |
| 03/28/2013 | WO2013044238A1 System and method for increasing bandwidth for digital predistortion in multi-channel wideband communication systems |
| 03/28/2013 | WO2013042754A1 Electric power amplification device |
| 03/28/2013 | WO2013042031A1 Combined predistorter and feedforward corrector apparatus suitable for use in a transmitter |
| 03/28/2013 | US20130076444 Amplification Circuit, Communication Device, and Transmission Device Using Amplification Circuit |
| 03/28/2013 | US20130076437 Combined predistorter and feedforward corrector apparatus suitable for use in a transmitter |
| 03/28/2013 | US20130076436 Load detecting impedance matching buffer |
| 03/28/2013 | US20130075608 Image sensor and x-ray image sensing module including the same |
| 03/28/2013 | DE102012217675A1 System und Verfahren zur Kalibrierung der Zeitsteuerungs-Fehlanpassung für Hüllkurven-Tracking-Sendesysteme System and method for calibration of the timing mismatch for envelope tracking transmitter systems |
| 03/27/2013 | EP2573937A1 Power amplifier module having bias circuit |
| 03/27/2013 | EP2572449A2 Multi-band high-efficiency doherty amplifier |
| 03/27/2013 | CN202841131U Multi-carrier power amplifier based on DPD technology |
| 03/27/2013 | CN202841064U D-type power amplifier |
| 03/27/2013 | CN202841061U Modularized feed-forward power amplifier |
| 03/27/2013 | CN202841060U Quasi-linear stereo audio frequency amplifier with direct current vacuum tube |
| 03/27/2013 | CN202841059U Clamp circuit and AB amplifier circuit |
| 03/27/2013 | CN202841058U 放大器 Amplifier |
| 03/27/2013 | CN103001608A Precision triangle waveform generator |
| 03/27/2013 | CN103001591A Method for eliminating nonlinear distortion |
| 03/27/2013 | CN103001590A Digital signal generator and digital microphone |
| 03/27/2013 | CN103001589A Photoelectric signal conversion and amplification device |
| 03/27/2013 | CN103001588A Audio amplifier circuit and method thereof |
| 03/27/2013 | CN101809864B Power amplifying circuit, and transmitter and wireless communication device using the same |
| 03/27/2013 | CN101800517B Predistorter and distortion compensation method |
| 03/27/2013 | CN101702618B Gain control of radio frequency linear power amplifier |
| 03/27/2013 | CN101682304B Multiport amplifiers in communications satellites |
| 03/27/2013 | CN101647196B Differential amplifier with active post-distortion linearization |
| 03/27/2013 | CN101436868B Digital baseband system for compensating for analog radio transmitter impairments |
| 03/27/2013 | CN101431313B Amplifying circuit and method for improving linearity by using grid non-linear capacitor |
| 03/26/2013 | US8405462 Phase-shift amplifier |
| 03/26/2013 | US8405457 Amplitude-stabilized odd order pre-distortion circuit |
| 03/26/2013 | US8405455 Amplifier and method for linearizing same |
| 03/21/2013 | WO2013040505A1 Circuitry for reducing power consumption |
| 03/21/2013 | WO2013039030A1 Power amplifier, and method for operating same |
| 03/21/2013 | WO2013037793A1 Device for trajectory modification |
| 03/21/2013 | WO2013016575A3 Low variation current multiplier |
| 03/21/2013 | WO2013009640A3 Signal path termination |
| 03/21/2013 | WO2012158423A3 Apparatus and methods for biasing power amplifiers |
| 03/21/2013 | WO2012066383A8 Orthogonal basis function set for digital predistorter |
| 03/21/2013 | US20130069725 Rf power amplifier |
| 03/21/2013 | US20130069722 Multi-band amplifier and method of amplifying multi-band |
| 03/21/2013 | US20130069717 Display Device and Method of Canceling Offset Thereof |