| Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008) |
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| 05/01/2013 | CN202916738U Power supply output stage circuit capable of avoiding sleep mode output lower than cut-off voltage |
| 05/01/2013 | CN103081359A Differential circuit |
| 05/01/2013 | CN103081354A Hybrid networks |
| 05/01/2013 | CN103081352A Push-push oscillator circuit |
| 05/01/2013 | CN103078598A Magnitude-phase consistent amplifying system for multi-channel analogue signal |
| 05/01/2013 | CN103078597A Offset circuit |
| 05/01/2013 | CN103077890A Semiconductor device and fabrication method |
| 05/01/2013 | CN102142818B Class-AB amplifier and over-temperature protection circuit thereof |
| 05/01/2013 | CN101951236B Digital variable gain amplifier |
| 05/01/2013 | CN101931737B Black level compensation circuit |
| 05/01/2013 | CN101931372B D type amplifier with second-order noise filtering circuit |
| 05/01/2013 | CN101931368B Low-noise amplifier |
| 05/01/2013 | CN101908820B Offset cancelling circuit |
| 04/30/2013 | US8433078 High perceived audio quality class D amplifier |
| 04/30/2013 | US8432962 Switched mode power amplification |
| 04/30/2013 | US8432228 Power control circuit for radio frequency power amplifiers |
| 04/30/2013 | US8432227 Power amplifier |
| 04/30/2013 | US8432223 Differential amplifier circuit |
| 04/30/2013 | US8432222 Apparatus and methods for electronic amplification |
| 04/30/2013 | US8432221 Switching amplifying method and switching amplifier |
| 04/30/2013 | US8432218 Harmonic-rejection power amplifier |
| 04/30/2013 | US8432180 Process monitor for monitoring an integrated circuit chip |
| 04/30/2013 | US8431883 Photoelectric conversion device comprising a current mirror circuit connected to a field effect transistor, a buffer and a voltage detection circuit |
| 04/27/2013 | CA2789047A1 Integrated circuit with logic circuitry and multiple concealing circuits |
| 04/27/2013 | CA2788474A1 Analog circuitry to conceal activity of logic circuitry |
| 04/25/2013 | WO2013058939A1 Filter for improved driver circuit efficiency and method of operation |
| 04/25/2013 | WO2013058529A1 Method and apparatus for outputting an audio signal |
| 04/25/2013 | WO2013058048A1 High frequency amplifier |
| 04/25/2013 | WO2012166897A3 Wide bandwidth class c amplifier with common-mode feedback |
| 04/25/2013 | WO2012158993A3 Feedforward active decoupling |
| 04/25/2013 | US20130101056 Receiver circuit and system including p-type sense amplifier |
| 04/25/2013 | US20130099868 Sound detecting circuit and amplifier circuit thereof |
| 04/25/2013 | US20130099867 Apparatus for doherty power amplifier and method for power amplification |
| 04/25/2013 | US20130099866 System and Method for a Multi-Band Power-Amplifier |
| 04/25/2013 | US20130099864 Power amplifier |
| 04/25/2013 | US20130099863 Fourth-order electrical current source apparatus, systems and methods |
| 04/25/2013 | US20130099861 Method and apparatus for controlling transmit signal of radio frequency power amplifier |
| 04/25/2013 | US20130099860 High frequency power amplifier |
| 04/25/2013 | US20130099859 Multilevel Class-D Amplifier |
| 04/25/2013 | US20130099858 Dual primary switched transformer for impedance and power scaling |
| 04/25/2013 | US20130099857 Audio programmable gain amplifier with automatic reconfiguration |
| 04/25/2013 | US20130099797 Variable Impedance Device |
| 04/25/2013 | DE102012019856A1 Electronic device e.g. notebook has power amplifier footprint having primary and secondary portions whose input/output (I/O) pads are coupled to multi-band power amplifier IC, when multi-band amplifier IC is mounted on circuit board |
| 04/24/2013 | EP2584698A1 High-frequency amplifier circuit |
| 04/24/2013 | EP2584697A2 Digital-controlled power amplifier with bandpass filtering/transient waveform control |
| 04/24/2013 | EP2583349A1 Active circulator |
| 04/24/2013 | EP2583114A1 Gradient coil power supply and a magnetic resonance imaging system |
| 04/24/2013 | CN202906847U Anti-distortion automatic gain adjusting circuit of Class D power amplifier |
| 04/24/2013 | CN202906846U High-precision amplifying circuit used for yarn tension detection |
| 04/24/2013 | CN202906845U Anti-cracking voice circuit for D-class power amplifier chip |
| 04/24/2013 | CN202906844U D-class power amplifying chip |
| 04/24/2013 | CN202906843U One-cycle-control double-voltage-reduction type half-bridge and full-bridge switch power amplifier |
| 04/24/2013 | CN202906842U K-under (KU) wave band solid-state power amplifier |
| 04/24/2013 | CN202906841U Circuit improving power control accuracy in radio frequency power amplifier |
| 04/24/2013 | CN202906840U Circuit capable of avoiding radio frequency power amplifier collector electrode or drain electrode power control saturation failure |
| 04/24/2013 | CN202906839U High frequency bandwidth amplifier circuit |
| 04/24/2013 | CN202906838U High frequency bandwidth amplifier circuit |
| 04/24/2013 | CN202903221U Monitoring circuit for sensor output signal |
| 04/24/2013 | CN103069714A Switched-mode power supply apparatus and method |
| 04/24/2013 | CN103066938A High-power switching power supply amplifier |
| 04/24/2013 | CN103066936A Method for imbalance correction by controlling delaying of pre-amplifier |
| 04/24/2013 | CN103066935A High-gain level switching circuit |
| 04/24/2013 | CN103066934A Variable-gain operational amplifier for infrared receiver |
| 04/24/2013 | CN103066933A Amplifier, fully differential amplifier and delta-sigma modulator |
| 04/24/2013 | CN103066932A Multistage radio frequency power amplifier circuit capable of reducing interference on ISM frequency band |
| 04/24/2013 | CN103066931A RF amplifier module, integrated circuit device, wireless communication unit and method therefor |
| 04/24/2013 | CN103066930A Circuit for reducing chopping amplifier output ripple, measuring device and signal measuring method |
| 04/24/2013 | CN103066928A Nonlinear power amplifier |
| 04/24/2013 | CN102158180B Switch-type operation amplifier with low power consumption |
| 04/24/2013 | CN102122925B Constant transconductance operational amplifier and method for operation |
| 04/24/2013 | CN102064777B Amplification circuit |
| 04/24/2013 | CN102064776B Power amplifier |
| 04/24/2013 | CN101807889B Class d amplifier |
| 04/24/2013 | CN101772887B Systems and methods for saturation detection and correction in a power control loop |
| 04/23/2013 | US8427256 Waveform shaping device, equalizer, receiving system, method of controlling waveform shaping device, control program, and computer-readable medium in which control program is recorded |
| 04/23/2013 | US8427241 High efficiency, high frequency amplifiers |
| 04/23/2013 | US8427240 Low-noise amplifier with gain enhancement |
| 04/23/2013 | US8427239 Apparatus and method for low noise amplification |
| 04/23/2013 | US8427238 Performance optimization of power amplifier |
| 04/23/2013 | US8427237 Common-mode feedback circuit |
| 04/23/2013 | US8427236 Operational amplifier, driver and display |
| 04/23/2013 | US8427235 Power-MOSFETs with improved efficiency for multi-channel class-D audio amplifiers and packaging thereof |
| 04/23/2013 | US8427231 Amplifying device and amplifying method |
| 04/18/2013 | WO2013055615A2 Hybrid coupler |
| 04/18/2013 | WO2013055171A1 Apparatus and method for modulating supply for a power amplifier |
| 04/18/2013 | WO2013055170A1 Apparatus and method for improving efficiency in power amplifier |
| 04/18/2013 | WO2013055090A1 Apparatus and method for calibration of supply modulation in transmitter |
| 04/18/2013 | WO2013054926A1 Amplifier circuit and a/d converter |
| 04/18/2013 | WO2013054601A1 Front-end amplifier |
| 04/18/2013 | WO2013054553A1 Distortion compensation circuit and transmission device using distortion compensation circuit and high-frequency power amplifier |
| 04/18/2013 | WO2013053661A1 A low-noise amplifier circuit |
| 04/18/2013 | US20130093534 Doherty Power Amplifier Network |
| 04/18/2013 | US20130093521 Apparatus and method for interleaving switching in power amplifier |
| 04/18/2013 | US20130093519 Positive and negative voltage input operational amplifier set |
| 04/18/2013 | US20130093518 Balanced-input current-sensing differential amplifier |
| 04/18/2013 | US20130093517 Buffer Amplifier |
| 04/18/2013 | US20130093516 Low output impedance rf amplifier |
| 04/18/2013 | US20130093515 Pwm comparator and class d amplifier |
| 04/18/2013 | US20130093511 Apparatus and method for improving efficiency in power amplifier |
| 04/18/2013 | US20130093509 Hybrid coupler |