| Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008) |
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| 09/11/2013 | CN203193576U High precision operational amplifier using data sampling |
| 09/11/2013 | CN203193575U High-efficiency power amplifier based on mobile communication system |
| 09/11/2013 | CN203193574U Power amplifier with digital pre-distortion compensation combination cancellation function |
| 09/11/2013 | CN203193573U Precise alternating current amplifier |
| 09/11/2013 | CN203193570U Amplifying circuit with self-adaption combined circuit cancellation function |
| 09/11/2013 | CN103297089A Laser voice restoration method and circuit based on PSD (Phase-Sensitive Detector) |
| 09/11/2013 | CN103297025A Memristor emulator |
| 09/11/2013 | CN103296985A Signal amplifying module used for communication device |
| 09/11/2013 | CN103296984A LVDS (low-voltage differential signaling) receiver |
| 09/11/2013 | CN103296983A Cascaded class d amplifier with improved linearity |
| 09/11/2013 | CN103296982A Circuit structure capable of realizing self-adaptive function in class-D audio power amplification circuit |
| 09/11/2013 | CN103296981A Bias circuit of power tube, power amplifier and wireless communication device |
| 09/11/2013 | CN102064795B Integrated circuit layout method for offset cancelling circuit |
| 09/11/2013 | CN102064773B 可调增益低噪声放大器 Variable gain low noise amplifier |
| 09/11/2013 | CN101904093B High-speed, multi-stage class ab amplifiers |
| 09/11/2013 | CN101741319B Heat regulating device and method for D-type audio amplifier and D-type audio amplifier with heat regulation |
| 09/11/2013 | CN101729030B D class amplifier and control method thereof |
| 09/11/2013 | CN101494440B Device and method for improving feedback linearity of 1.5 bit Sigma-Delta modulation D type amplifier |
| 09/10/2013 | US8532752 Biosignal amplifying device |
| 09/10/2013 | US8531243 Bias controlling apparatus |
| 09/10/2013 | US8531242 Operational amplifier with overdriving circuit and method for same |
| 09/10/2013 | US8531241 System and method for process, voltage, temperature (PVT) stable differential amplifier transfer function |
| 09/10/2013 | US8530818 Apparatus, method and system for providing reflection of an optical signal |
| 09/06/2013 | WO2013130899A1 Load current sensing |
| 09/06/2013 | WO2013130731A1 Digital input class-d audio amplifier |
| 09/06/2013 | WO2013129431A1 Amplifier and wireless communication unit |
| 09/06/2013 | WO2013127663A1 Protection module for rf-amplifier |
| 09/06/2013 | WO2013127620A1 A circuit for use with a loudspeaker for portable equipments |
| 09/06/2013 | WO2013127335A1 Low-voltage differential signal receiver |
| 09/05/2013 | US20130231069 Envelope Tracking Power Amplifier System with Delay Calibration |
| 09/05/2013 | US20130229236 Optical receiver based on a decision feedback equalizer |
| 09/05/2013 | US20130229235 High-frequency amplifier, and high-frequency module and wireless transceiver using same |
| 09/05/2013 | US20130229234 Enhanced doherty amplifier with asymmetrical semiconductors |
| 09/05/2013 | US20130229233 Doherty power amplifier apparatus and power amplification method |
| 09/05/2013 | US20130229232 Amplifier Bandwidth Extension for High-Speed Tranceivers |
| 09/05/2013 | US20130229231 Differential circuit compensating gain enhancement due to self heating of transistors |
| 09/05/2013 | US20130229230 Cascaded class d amplifier with improved linearity |
| 09/05/2013 | US20130229227 Amplification apparatus |
| 09/04/2013 | EP2634918A2 Amplifier |
| 09/04/2013 | EP2634917A1 Protection module for RF-amplifier |
| 09/04/2013 | EP2633621A1 Audio amplifier using multi-level pulse width modulation |
| 09/04/2013 | CN203180903U Optical signal post feedback-type amplifier of optical transmitter and receiver |
| 09/04/2013 | CN203180861U Low-cost and high-integration density radio frequency integrated circuit device |
| 09/04/2013 | CN203180854U High-fidelity power amplifier |
| 09/04/2013 | CN203180853U Combination type power amplifier |
| 09/04/2013 | CN203180852U Integrated power amplifier interstage signal coupling circuit |
| 09/04/2013 | CN203180851U Current loading, separating and amplifying circuit for audio paying |
| 09/04/2013 | CN203180850U Efficient digital audio power amplifier for mobile payment |
| 09/04/2013 | CN203180849U Integrated audio power amplifier for audio paying |
| 09/04/2013 | CN203180848U High-frequency power amplifying circuit for audio paying |
| 09/04/2013 | CN203180847U Double audio power amplifying circuit for audio paying |
| 09/04/2013 | CN203180846U Power amplifying circuit for audio paying |
| 09/04/2013 | CN203180845U Signal amplifying circuit for audio paying |
| 09/04/2013 | CN203180844U Audio amplifier for audio paying |
| 09/04/2013 | CN203180843U Tone quality adjusting power amplifier for audio paying |
| 09/04/2013 | CN203180842U Low-frequency power amplifier for mobile payment |
| 09/04/2013 | CN203180841U Efficient audio power amplifier for cell phone audio payment |
| 09/04/2013 | CN203180840U Digital audio power amplifier for mobile payment |
| 09/04/2013 | CN203180839U Audio power amplifier |
| 09/04/2013 | CN203180838U Time-delay release amplifier circuit of operational amplifier relay |
| 09/04/2013 | CN203180837U Double-gain intermediate frequency amplifier |
| 09/04/2013 | CN203180836U Integrated circuit operational amplifier |
| 09/04/2013 | CN203180835U Switching power amplifier for magnetic suspension turbo molecular pump |
| 09/04/2013 | CN203180834U High-frequency signal amplifying circuit for audio paying |
| 09/04/2013 | CN203180833U Nuclear radiation detection signal processor |
| 09/04/2013 | CN203180832U 射频功率放大器 RF power amplifier |
| 09/04/2013 | CN203180831U Front stereophonic amplifier |
| 09/04/2013 | CN203180830U Optical signal high-frequency feedback two-stage amplifier of optical transceiver transmitter |
| 09/04/2013 | CN203180829U Optical signal front feedback-type two-stage amplifier of optical transceiver transmitter |
| 09/04/2013 | CN203180828U High-accuracy linear amplifier |
| 09/04/2013 | CN203180827U True logarithm amplifier |
| 09/04/2013 | CN103283144A Current mirror and high-ompliance single-stage amplifier |
| 09/04/2013 | CN103281042A Remote transmission IEPE type charge amplifier |
| 09/04/2013 | CN103281041A Collected signal preprocessor of air conditioner control subsystem in transformer substation |
| 09/04/2013 | CN103281040A On-chip power amplifier synthesized based on power of eight branches of fully symmetrical transformers |
| 09/04/2013 | CN103281039A E-type power amplifier for controlling difference between discharge branches in delayed mode |
| 09/04/2013 | CN102204086B Headphone amplifier circuit and power supply method, and portable electronic device |
| 09/04/2013 | CN101958692B Low-pressure rail-to-rail calculation magnification circuit |
| 09/03/2013 | USRE44469 Nanoelectronic differential amplifiers and related circuits having graphene nanoribbons |
| 09/03/2013 | US8526907 Power consumption reduction technique for integrated wireless radio receiver front-ends |
| 09/03/2013 | US8526536 Quad LINC transmitter with switchable Chireix amplifiers |
| 09/03/2013 | US8525596 Reference buffer amplifier |
| 09/03/2013 | US8525595 Vramp limiting using resistors |
| 09/03/2013 | US8525594 Radio frequency amplifier circuit |
| 09/03/2013 | US8525593 Circuit and method for amplifying a digital signal |
| 09/03/2013 | US8525591 Signal level conversion circuit, physical quantity detection device and electronic apparatus |
| 09/03/2013 | US8525588 Vacuum electronic device |
| 09/03/2013 | US8525587 Switching amplifier with inductance means for transmitting energy |
| 09/03/2013 | US8525095 Nanothermocouple detector based on thermoelectric nanowires |
| 09/03/2013 | US8525094 Photoelectric conversion circuit |
| 08/29/2013 | WO2013126610A1 Adjustable bypass circuit for a supply voltage for an amplifier |
| 08/29/2013 | WO2013071275A3 Method, system, and circuit with a driver output interface having a common mode connection coupled to a transistor bulk connection |
| 08/29/2013 | US20130223651 Audio amplifier using multi-level pulse width modulation |
| 08/29/2013 | US20130222065 Doherty power amplifier apparatus and power amplification method |
| 08/29/2013 | US20130222064 Low Voltage Operation For A Power Amplifier |
| 08/29/2013 | US20130222063 Method and Apparatus for Efficient and Distortion Compensated Digital Class-D Amplifier Ternary Modulation Scheme |
| 08/29/2013 | US20130222062 Efficiency improved envelope amplifier using dual switching amplifiers |
| 08/29/2013 | US20130222056 Rf beamforming in phased array application |
| 08/29/2013 | US20130221995 Sense amplifier |
| 08/29/2013 | DE102009051627B4 Mehrschichtverstärkermodul Multilayer amplifier module |