| Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008) |
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| 08/28/2013 | EP2632175A1 Earphone power amplifier, working method, and mobile terminal equipment |
| 08/28/2013 | EP2632174A1 A circuit for use with a loudspeaker for portable equipments |
| 08/28/2013 | EP2630727A1 Folded cascode operational amplifier |
| 08/28/2013 | EP2630726A1 Pwm comparator and class d amplifier |
| 08/28/2013 | CN203167284U 无线接入点双向功率放大器 Bidirectional amplifiers wireless access point |
| 08/28/2013 | CN203166845U Tension signal amplifying device |
| 08/28/2013 | CN203166844U High gain differential amplifier of airborne data collector |
| 08/28/2013 | CN203166843U Head amplifying circuit for routers |
| 08/28/2013 | CN203166842U Multi-level 3dB (decibel) bridge circuit for high-power synthesis |
| 08/28/2013 | CN203166841U Power supply processing circuit for audio power amplifier |
| 08/28/2013 | CN203166840U Power amplifier based on monolithic integrated circuit |
| 08/28/2013 | CN203166839U Amplifier applicable for antenna signals |
| 08/28/2013 | CN203166838U D-type audio power amplifier circuit provided with double negative feedback circuits |
| 08/28/2013 | CN203166837U Class AB power amplifier |
| 08/28/2013 | CN203166836U Amplifier with pass-through mode |
| 08/28/2013 | CN203166835U Pre-amplifier for loop antenna |
| 08/28/2013 | CN203166834U Digital power amplification circuit with switching power supply |
| 08/28/2013 | CN103270695A Amplifier circuit and wireless communication device |
| 08/28/2013 | CN103269208A Radio frequency integrated circuit device with low cost and high integration level |
| 08/28/2013 | CN103269206A Output limiter circuit of amplifier |
| 08/28/2013 | CN103269205A Power amplifier |
| 08/28/2013 | CN103269204A Multilevel 3dB bridge circuit for high-power synthesis |
| 08/28/2013 | CN103269203A Biasing circuit of operational amplifier |
| 08/28/2013 | CN103268684A Amplifying system for detected signal in transformer burglary prevention |
| 08/28/2013 | CN102270968B Off-chip harmonic wave absorbing circuit |
| 08/28/2013 | CN101964632B Power-reinforced electronic device |
| 08/28/2013 | CN101861703B Transceiving circuit for contactless communication |
| 08/27/2013 | US8519797 Power amplifier and method for controlling power amplifier |
| 08/27/2013 | US8519796 Bias generation circuit, power amplifier module, and semiconductor device |
| 08/27/2013 | US8519795 High frequency power amplifier |
| 08/27/2013 | US8519794 Current mirror with low headroom and linear response |
| 08/27/2013 | US8519793 Operational amplifier circuit |
| 08/27/2013 | US8519792 Differential voltage sensing system and method for using the same |
| 08/27/2013 | US8519791 Free-fly class D power amplifier |
| 08/27/2013 | US8519787 High frequency amplifier, wireless device, and control method |
| 08/27/2013 | US8519785 Differential amplifier with duty cycle compensation |
| 08/27/2013 | CA2533498C Modulated triangular wave amplifier |
| 08/22/2013 | WO2013123074A1 Amplifier with reduced source degeneration inductance |
| 08/22/2013 | US20130217345 Apparatus and methods for envelope tracking systems |
| 08/22/2013 | US20130215954 Analog signal current integrators with tunable peaking function |
| 08/22/2013 | US20130214868 Sense amplifier |
| 08/22/2013 | US20130214867 Power amplifier device |
| 08/22/2013 | US20130214866 Power amplifier tube and power amplification method |
| 08/22/2013 | US20130214865 Capacitive level-shifting circuits and methods for adding dc offsets to output of current-integrating amplifier |
| 08/22/2013 | US20130214864 Signal amplifying circuit of communication device |
| 08/22/2013 | US20130214863 Front-End System for Radio Devices |
| 08/22/2013 | US20130214859 Switch configuration for default-on n-way active splitters |
| 08/21/2013 | EP2629434A2 A front-end system for radio devices |
| 08/21/2013 | EP2629417A1 Switching amplifier system and method for suppressing signal distortion thereof |
| 08/21/2013 | EP2629416A2 Envelope tracking amplifier |
| 08/21/2013 | CN203151436U Stereophonic high-fidelity disc and prime amplifier |
| 08/21/2013 | CN203151435U Audio input control and power amplification circuit |
| 08/21/2013 | CN1819712B Electroacoustic double-magnetic pole and moving coil loundspeaker with high conversion rate and acoustics, its playing and controlling circuit thereof |
| 08/21/2013 | CN103259498A Variable gain amplifier system |
| 08/21/2013 | CN103259497A Capacitive level-shifting circuits and methods for adding dc offsets to output of current-integrating amplifier |
| 08/21/2013 | CN103259496A Closed-loop negative-feedback modulation and demodulation switch power amplifier |
| 08/21/2013 | CN103259495A Switching amplifier system and method for suppressing signal distortion thereof |
| 08/21/2013 | CN101997490B Constant gain time amplifier adopting digital calibration technology |
| 08/21/2013 | CN101669280B Power supply providing ultrafast modulation of output voltage |
| 08/21/2013 | CN101262262B Power amplifier circuit, control method thereof and control program thereof |
| 08/20/2013 | US8514631 Determining a logic state based on currents received by a sense amplifer |
| 08/20/2013 | US8514157 Differential amplifier |
| 08/20/2013 | US8514025 Amplifier circuit and method of amplifying a signal in an amplifier circuit |
| 08/20/2013 | US8514024 High power-supply rejection ratio amplifying circuit |
| 08/20/2013 | US8514023 Accurate bias tracking for process variation and supply modulation |
| 08/20/2013 | US8514022 RF power amplifier |
| 08/20/2013 | US8514021 Radio frequency integrated circuit |
| 08/20/2013 | US8514020 Temperature compensated feedforward linearizer |
| 08/15/2013 | WO2013050493A3 Envelope tracking push-pull or differential power amplifier |
| 08/15/2013 | US20130208922 Integrated Amplifier for Driving Acoustic Transducers |
| 08/15/2013 | US20130208393 Corona ignition with self-tuning power amplifier |
| 08/15/2013 | US20130207732 Amplifier with reduced source degeneration inductance |
| 08/15/2013 | US20130207731 Apparatus and methods for envelope tracking |
| 08/15/2013 | US20130207730 Impedance matching circuit, power amplifier and manufacturing method for variable capacitor |
| 08/15/2013 | US20130207729 Power amplifier |
| 08/15/2013 | US20130207728 Amplifier circuit and operating method thereof |
| 08/15/2013 | US20130207727 Apparatus and methods for reducing output noise of a signal channel |
| 08/15/2013 | US20130207726 Amplification device and amplification method |
| 08/15/2013 | US20130207724 Crossover performance of power amplifier |
| 08/15/2013 | US20130207723 A gm-ratioed amplifier |
| 08/15/2013 | US20130207722 Peaking amplifier with capacitively-coupled parallel input stages |
| 08/15/2013 | US20130207721 Envelope Tracking Amplifier |
| 08/15/2013 | US20130207720 Operational amplifier with elimination of offset voltage |
| 08/15/2013 | US20130207719 Transformer power amplifier |
| 08/14/2013 | EP2625786A1 Impedance -matching circuits for multi - output power supplies driving c02 gas -discharge lasers |
| 08/14/2013 | EP2625785A1 Signal processing arrangement and signal processing method |
| 08/14/2013 | CN203135801U Pre-positioned signal amplifying circuit of magneto-electricity vortex street sensor |
| 08/14/2013 | CN203135800U Single-chip-control switching amplifier drive circuit module |
| 08/14/2013 | CN203135799U Single-chip power amplifier |
| 08/14/2013 | CN203135798U Nonlinear power amplifier |
| 08/14/2013 | CN103248330A Programmable gain amplifier with high gain accuracy |
| 08/14/2013 | CN103248329A Single-end and differential antenna multiplexed power amplifier circuit and method |
| 08/14/2013 | CN103248328A Power amplifier and utilization method |
| 08/14/2013 | CN101911478B Systems and methods for improved over-current clipping |
| 08/14/2013 | CN101803185B Audio power amplifier |
| 08/14/2013 | CN101803183B Local broadcasting system |
| 08/13/2013 | US8509629 High sensitivity two-stage amplifier |
| 08/13/2013 | US8508301 Three dimensional inductor, transformer and radio frequency amplifier |
| 08/13/2013 | US8508299 High-frequency power amplifier |
| 08/13/2013 | US8508298 Amplifier using master-slave control scheme |