| Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008) |
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| 11/13/2013 | CN203289385U Filtering sound signal amplifier |
| 11/13/2013 | CN203289384U Infrared pre-amplifier |
| 11/13/2013 | CN203287702U Electronic PID (Proportion Integration Differentiation) controller for power system |
| 11/13/2013 | CN103391059A Audio system with D amplifier, and integrated circuit chip |
| 11/13/2013 | CN103391058A Miniature solid-state power amplification device applied to deep-space exploration |
| 11/13/2013 | CN103391057A Reverse F-type power amplifier and emitter as well as processing method |
| 11/13/2013 | CN103391056A Conductivity-change type power amplifier |
| 11/13/2013 | CN103391048A Self-adaptive linear biasing circuit structure |
| 11/13/2013 | CN102201790B Coupling blocking method and operational amplifier |
| 11/12/2013 | US8581666 Integrated circuit |
| 11/12/2013 | US8581665 Doherty amplifier |
| 11/12/2013 | US8581664 Pulse electric power amplification apparatus |
| 11/12/2013 | US8581663 Multi-port amplification device that self-compensates in the presence of traffic |
| 11/12/2013 | US8581662 Amplifying system |
| 11/12/2013 | US8581661 Audio programmable gain amplifier with automatic reconfiguration |
| 11/07/2013 | WO2013166238A1 Compensation technique for feedback amplifiers |
| 11/07/2013 | WO2013166055A2 Enhanced pulse frequency modulation (pfm) control mode for switching regulators |
| 11/07/2013 | WO2013165653A1 Split capacitors scheme for suppressing overshoot voltage glitches in class d amplifier output stage |
| 11/07/2013 | WO2013165381A1 Feedback-based trans-impedance amplifier with programmable input impedance |
| 11/07/2013 | WO2013165082A1 Amplifier and filter having cutoff frequency controlled according to digital code |
| 11/07/2013 | WO2013164229A1 Class d audio amplifier with adjustable loop filter characteristics |
| 11/07/2013 | WO2013163691A1 Pulse generating circuit for audio-frequency amplifiers and regulated power supplies |
| 11/07/2013 | WO2013129431A4 Amplifier and wireless communication unit |
| 11/07/2013 | US20130294179 Circuits and methods for calibrating offset in an amplifier |
| 11/07/2013 | US20130293310 Dual inductive element charge pump buck and buck power supplies |
| 11/07/2013 | US20130293309 Doherty amplifier |
| 11/07/2013 | US20130293308 Method and apparatus for power amplifier linearization |
| 11/07/2013 | US20130293307 Active antenna arrangement with doherty amplifier |
| 11/07/2013 | US20130293305 Amplifier and filter having cutoff frequency controlled according to digital code |
| 11/07/2013 | US20130293304 Compensation technique for feedback amplifiers |
| 11/07/2013 | US20130293302 Output Coupling Capacitor Free Audio Power Amplifier Dynamically Configured for Speakers and Headphones with Excellent Click and Pop Performance |
| 11/07/2013 | US20130293301 Trans-impedance amplifier for high speed optical-electrical interfaces |
| 11/07/2013 | US20130293300 Input/output sense amplifier and semiconductor apparatus including the same |
| 11/07/2013 | US20130293299 Voltage variable type digital audio amplifying device for noise compensation and method thereof |
| 11/07/2013 | US20130293298 Split Capacitors Scheme for Suppressing Overshoot Voltage Glitches in Class D Amplifier Output Stage |
| 11/07/2013 | US20130293297 Amplification circuit comprising input signal limiting network |
| 11/07/2013 | US20130293296 Diode enhanced amplifier circuits and methods thereof |
| 11/07/2013 | US20130293295 Compact rf power amplifier |
| 11/07/2013 | US20130293293 Compensation technique for feedback amplifiers |
| 11/07/2013 | DE102012009099A1 Schaltungsanordnung mit abstimmbarer Transkonduktanz Circuitry with tunable transconductance |
| 11/06/2013 | EP2660975A1 Tower mounted amplifier and method of use thereof |
| 11/06/2013 | EP2660974A2 Transmitter circuit and method for controlling operation thereof |
| 11/06/2013 | EP2660973A1 Doherty amplifier |
| 11/06/2013 | EP2659587A1 Operational amplifier with latching state suppression |
| 11/06/2013 | EP2659586A1 Method for forming an electric signal representing a sound and a device therefor |
| 11/06/2013 | CN203278758U Collected signal preceding stage processor of air conditioning control subsystem in transformer substation |
| 11/06/2013 | CN203278757U Differential signal amplifying circuit of power box of surveillance camera |
| 11/06/2013 | CN203278756U Module for amplifying acquired signals of air conditioning control subsystem of transformer substation |
| 11/06/2013 | CN203278755U Chip with multiple packaged audio power amplifying circuit wafers |
| 11/06/2013 | CN203278754U High-frequency power amplification compensation gain circuit |
| 11/06/2013 | CN203278753U Efficient amplifier with three-circuit combining and twice offsetting functions |
| 11/06/2013 | CN203278751U Amplifier output amplitude limiting circuit |
| 11/06/2013 | CN203275508U Power capability testing device and power amplifier unit |
| 11/06/2013 | CN102292911B Signal buffer amplifier |
| 11/06/2013 | CN102195578B Output buffer circuit and method capable of inhibiting voltage overshoot |
| 11/06/2013 | CN102163955B Low-noise amplifier adopting single-ended input and differential output |
| 11/06/2013 | CN102144196B Reference voltage generating circuit |
| 11/06/2013 | CN102136827B Differential amplifier capable of compensating input offset voltage and compensating method |
| 11/06/2013 | CN102098011B Circuit for rapidly controlling mute of audio power amplifier |
| 11/06/2013 | CN102064774B Implementation method of power amplifying circuit and power amplifying device |
| 11/06/2013 | CN102035480B Power supply method and device and system for radio frequency power amplifier |
| 11/06/2013 | CN102006017B Biasing circuit and power amplifier circuit thereof |
| 11/06/2013 | CN101997495B Adaptive bias circuit for adaptively biasing communication system |
| 11/06/2013 | CN101978598B Quadrature output low noise transconductance amplifier having differential input |
| 11/06/2013 | CN101873106B Operational amplifier, driver and display |
| 11/06/2013 | CN101534094B Compensating circuit |
| 11/05/2013 | US8576013 Power distortion-based servo control systems for frequency tuning RF power sources |
| 11/05/2013 | US8576012 Single-to-differential conversion circuit |
| 11/05/2013 | US8576011 Amplifier with high power supply noise rejection |
| 11/05/2013 | US8576010 Apparatus and method for a switched capacitor architecture for multi-band doherty power amplifiers |
| 11/05/2013 | US8576009 Broadband high power amplifier |
| 11/05/2013 | US8576007 High speed amplifier |
| 11/05/2013 | US8576006 Wideband variable gain amplifier |
| 11/05/2013 | US8576005 Transceiver and integrated circuit |
| 11/05/2013 | US8576004 Metamaterial power amplifier systems |
| 11/05/2013 | US8576003 Cascaded class D amplifier with improved linearity |
| 11/05/2013 | CA2725037C Audio amplifier and method for reconfiguring an audio amplifier |
| 10/31/2013 | WO2013162836A1 Overcurrent protection for class d power amplifier |
| 10/31/2013 | WO2013162552A1 Open-gain trans-impedance amplifier with programmable input impedance |
| 10/31/2013 | WO2013160962A1 Fet chip |
| 10/31/2013 | US20130285751 Enhanced pulse frequency modulation (pfm) control mode for switching regulators |
| 10/31/2013 | US20130285750 Supply tracking |
| 10/31/2013 | US20130285749 High-frequency power amplifier |
| 10/31/2013 | US20130285746 Differential Source Follower having 6dB Gain with Applications to WiGig Baseband Filters |
| 10/31/2013 | US20130285745 Pop-noise reduction |
| 10/31/2013 | US20130285744 Overcurrent Protection for Class D Power Amplifier |
| 10/31/2013 | US20130284903 Method and system for a feedback transimpedance amplifier with sub-40khz low-frequency cutoff |
| 10/31/2013 | US20130284902 Anti-blooming circuit for integrating photodiode pre-amplifiers |
| 10/30/2013 | EP2658118A1 Amplifier circuit and wireless communication device |
| 10/30/2013 | EP2658117A1 Pop-noise reducing method for adjusting switching frequency or phase in a class-D amplifier |
| 10/30/2013 | EP2658116A1 Amplifier circuit |
| 10/30/2013 | EP2658115A1 Amplifying device |
| 10/30/2013 | EP2656501A2 Magnetic bearing drive circuit |
| 10/30/2013 | EP2656500A2 Switched-capacitance gain amplifier with improved input impedance |
| 10/30/2013 | EP2656387A1 Complementary darlington emitter follower with improved switching speed and improved cross-over control and increased output voltage |
| 10/30/2013 | CN203261298U Open loop amplification circuit for router |
| 10/30/2013 | CN203261297U Full-frequency D-class power amplifier circuit |
| 10/30/2013 | CN203261296U Low-frequency power amplifier |
| 10/30/2013 | CN203261295U Automobile power amplifier with Bluetooth data receiving function |
| 10/30/2013 | CN203261294U Optic translator rapid linear driving circuit |