| Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008) |
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| 10/10/2013 | US20130264574 Semiconductor device, and display device and electronic device using the same |
| 10/10/2013 | DE102012007143A1 Amplifier apparatus for amplifying audio signals from audio reproducing apparatus e.g. compact disk (CD) player, has housing frame whose housing plate is surrounded by another housing plate of housing frame enclosing amplifier circuits |
| 10/09/2013 | EP2648334A1 Mems device front-end charge amplifier |
| 10/09/2013 | EP2648333A2 Sensor amplifier arrangement and method for amplifying a sensor signal |
| 10/09/2013 | EP2648332A1 Pre-amplifier polarisation device |
| 10/09/2013 | EP2647123A1 Bias point setting for third order linearity optimization of class a amplifier |
| 10/09/2013 | EP2647115A2 Efficiency-optimizing, calibrated sensorless power/energy conversion in a switch-mode power supply |
| 10/09/2013 | CN203233370U Voltage transformation and amplification circuit for router |
| 10/09/2013 | CN203233369U Front end amplification circuit for router |
| 10/09/2013 | CN203233368U LC filtering and RC coupling intermediate frequency signal amplifying circuit |
| 10/09/2013 | CN203233367U Wide-frequency active antenna |
| 10/09/2013 | CN203233366U Intermodulation suppressing amplification circuit |
| 10/09/2013 | CN203232527U Amplifying circuit for detection signals in antitheft system of transformer |
| 10/09/2013 | CN103348590A Power amplification circuit |
| 10/09/2013 | CN103346745A Input-stage fully differential operational amplifier of D-type audio power amplifier |
| 10/09/2013 | CN103346744A Current arithmetic device |
| 10/09/2013 | CN103346743A High-speed high-gain fully-differential operational amplifier |
| 10/09/2013 | CN103346742A Acousto-optic Q-switch driver |
| 10/09/2013 | CN103346741A Double-circuit noise canceling type current-reuse low noise amplifier |
| 10/09/2013 | CN103346740A Class D audio power amplifier for suppressing noise and audio signal processing method thereof |
| 10/09/2013 | CN103346739A System and method for amplifying G-class voice frequency |
| 10/09/2013 | CN102118149B Method and device for switching signals |
| 10/09/2013 | CN101667853B Mobile wireless communication device with separate in-phase and quadrature power amplification |
| 10/08/2013 | USRE44525 Systems and methods for over-current protection |
| 10/08/2013 | US8554162 High efficiency power amplifier |
| 10/08/2013 | US8553815 Gain control for a receiver in a multi-carrier communication system |
| 10/08/2013 | US8552802 Amplifying circuit and current-voltage conversion circuit |
| 10/08/2013 | US8552801 Amplifier common-mode control methods |
| 10/08/2013 | US8552800 Wireless communication device and semiconductor package device having a power amplifier therefor |
| 10/08/2013 | US8552799 Power amplifying circuit |
| 10/08/2013 | US8552355 Smoke sensor including a current to voltage circuit having a low frequency correction means to produce a correction current |
| 10/03/2013 | WO2013147924A1 Tapered attenuator network for mitigating effects of direct current (dc) bias inductor self-resonance in traveling wave amplifiers |
| 10/03/2013 | WO2013145748A1 Amplifier and amplification method |
| 10/03/2013 | WO2013142944A1 Differential amplifier and electrode for measuring a biopotential |
| 10/03/2013 | WO2013075706A3 Radio-frequency class d mosfet amplifier module |
| 10/03/2013 | US20130260704 Radio frequency power amplifier with low dynamic error vector magnitude |
| 10/03/2013 | US20130259268 Speaker System and Method for Driving Same |
| 10/03/2013 | US20130258148 Amplification circuit, photoelectric conversion apparatus, and imaging system |
| 10/03/2013 | US20130257637 Operational amplifier, analog arithmetic circuit, and analog to digital converter |
| 10/03/2013 | US20130257545 Power amplifier including variable capacitor circuit |
| 10/03/2013 | US20130257544 Wireless communication system |
| 10/03/2013 | US20130257542 Voltage buffer |
| 10/03/2013 | US20130257541 Preamplifier polarisation device |
| 10/03/2013 | US20130257540 High frequency amplifier |
| 10/03/2013 | US20130257538 Common mode input control for switched capacitor amplifier in pipeline analog-to-digital converter |
| 10/03/2013 | US20130257537 Matched feedback amplifier with improved linearity |
| 10/03/2013 | US20130257536 Offset reduction for analog front-ends |
| 10/03/2013 | US20130257535 Fully Differential Amplifier Topology to Drive Dynamic Speakers in Class AB Mode |
| 10/03/2013 | US20130257534 Input receiver circuit having single-to-differential amplifier, and semiconductor device including the same |
| 10/03/2013 | US20130257533 Switched-mode power supply and method of operation |
| 10/03/2013 | US20130257513 Fully complementary self-biased differential receiver with startup circuit |
| 10/02/2013 | EP2645570A1 Optical motion sensor |
| 10/02/2013 | EP2645565A1 A fully differential amplifier topology to drive dynamic speakers in class AB mode |
| 10/02/2013 | CN203225754U Multi-carrier base station power amplification system and communication system |
| 10/02/2013 | CN203225711U Isolation amplifier |
| 10/02/2013 | CN203225710U Integrated fully-differential amplifier |
| 10/02/2013 | CN203225709U Floating type amplifying circuit for detecting isolation voltage of resistance step-down transformer |
| 10/02/2013 | CN203225708U Instrumentation amplifier circuit |
| 10/02/2013 | CN203225707U Power amplifier for mobile phone audio payment |
| 10/02/2013 | CN203225706U Circuit used for dual-track signal amplifier |
| 10/02/2013 | CN103339854A Method for forming an electric signal representing a sound and a device therefor |
| 10/02/2013 | CN103339853A Switched-capacitance gain amplifier with improved input impedance |
| 10/02/2013 | CN103338015A Amplifier for increasing gain and design method of amplifier |
| 10/02/2013 | CN103338014A Operational amplifier circuits |
| 10/02/2013 | CN103338013A Power tube grid electrode drive device of D-type audio power amplifier controlled by edge slope |
| 10/02/2013 | CN103338012A Current limiting power amplification driving circuit for power line carrier communication |
| 10/02/2013 | CN102165687B System and method for generating error voltage |
| 10/01/2013 | US8548093 Power amplification based on frequency control signal |
| 10/01/2013 | US8547185 Center-tapped inductor balun |
| 10/01/2013 | US8547177 All-digital switched-capacitor radio frequency power amplification |
| 10/01/2013 | US8547176 Distributed power amplifier with active matching |
| 10/01/2013 | US8547175 Output circuit |
| 10/01/2013 | US8547172 Optical transmitter with multiple isolated inputs and signal combining network |
| 10/01/2013 | US8547171 System and method for controlling radio frequency transmissions from an electronic device |
| 10/01/2013 | US8547141 Wide dynamic range, wide bandwidth, voltage to current converter |
| 10/01/2013 | US8546939 RF module including control IC without the aid of a relay pad |
| 09/27/2013 | CA2820441A1 Method and apparatus for reducing charge and discharge time of capacitive elements |
| 09/26/2013 | WO2013142782A2 Low gm transconductor |
| 09/26/2013 | WO2013142400A1 Enhanced transconductance circuit |
| 09/26/2013 | WO2013140914A1 Transmitter and transmission method |
| 09/26/2013 | WO2013140852A1 Reference-voltage circuit |
| 09/26/2013 | WO2013140286A1 Bandpass sampling schemes for observation receiver for use in pa dpd system for concurrent multi-band signals |
| 09/26/2013 | WO2013138927A1 Audio system with integrated power, audio signal and control distribution |
| 09/26/2013 | WO2013138849A1 Amplifier |
| 09/26/2013 | WO2013107784A3 Method for the phase balancing of several hf power generating units of an hf power supply system, and power supply system |
| 09/26/2013 | US20130249639 Folded cascode amplifier with an enhanced slew rate |
| 09/26/2013 | US20130249638 Amplifying apparatus |
| 09/26/2013 | US20130249637 Multi-path broadband amplifier |
| 09/26/2013 | US20130249635 Amplifier for output buffer and signal processing apparatus using the same |
| 09/26/2013 | US20130249633 Low gm transconductor |
| 09/26/2013 | US20130249632 Enhanced transconductance circuit |
| 09/26/2013 | US20130249628 Low noise cryogenic amplifier |
| 09/26/2013 | US20130249627 Time difference amplifier and amplification method using slew rate control |
| 09/25/2013 | EP2642661A2 System and methods of bimodal automatic power and frequency tuning of RF generators |
| 09/25/2013 | EP2641328A1 Current mode power amplifier providing harmonic distortion suppression |
| 09/25/2013 | EP2641325A1 Orthogonal basis function set for ditigal predistorter |
| 09/25/2013 | EP2641324A1 Joint process estimator with variable tap delay line for use in power amplifier digital predistortion |
| 09/25/2013 | CN203219277U Memristor emulator |
| 09/25/2013 | CN203219251U Electric power amplification device |
| 09/25/2013 | CN203219250U Speed type flow meter amplifying circuit based on MSP430 single chip microcomputer |