| Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008) |
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| 09/25/2013 | CN203219249U Power amplifier, transmitter and wireless measurement while drilling system |
| 09/25/2013 | CN203219248U LTE (long term evolution) radio frequency power amplifier |
| 09/25/2013 | CN103329433A Output-mode switching amplifier |
| 09/25/2013 | CN103329431A Audio amplifier using multi-level pulse width modulation |
| 09/25/2013 | CN103329429A Apparatus and method for miller compensation for multi-stage amplifier |
| 09/25/2013 | CN103326682A Adjustable operational transconductance amplifier with high linearity |
| 09/25/2013 | CN103326681A Amplifier for output buffer, signal processing apparatus and amplifier circuit |
| 09/25/2013 | CN103326680A Class D audio power amplifier and audio signal processing method thereof |
| 09/25/2013 | CN103326679A Class D audio power amplifier and audio signal processing method thereof |
| 09/25/2013 | CN103326678A Power amplifier, asymmetric Doherty power amplifier equipment and base station |
| 09/25/2013 | CN103326677A Audio power amplifier and adjusting method thereof |
| 09/25/2013 | CN103326676A 功率放大器 PA |
| 09/25/2013 | CN103326675A Linear radiofrequency power amplifier |
| 09/25/2013 | CN101806771B Preamplifier circuit device of polarograph and method |
| 09/24/2013 | US8542066 Apparatus and methods for reducing output noise of a signal channel |
| 09/24/2013 | US8542065 Trans-impedance amplifier for optical receiver |
| 09/24/2013 | US8542064 Methods and apparatus to control power in a printer |
| 09/24/2013 | US8542063 Adaptive amplification circuit |
| 09/24/2013 | US8541733 Laser light detection circuit |
| 09/19/2013 | WO2013138645A1 Pulse width modulation scheme with reduced harmonics and signal images |
| 09/19/2013 | WO2013138546A1 Auto-zeroed amplifier with low input leakage |
| 09/19/2013 | WO2013137291A1 Wireless device and wireless transmission method |
| 09/19/2013 | WO2013136860A1 Transmission apparatus and transmission method |
| 09/19/2013 | WO2013136649A1 Wireless communication apparatus |
| 09/19/2013 | WO2013136539A1 Amplitude modulation device |
| 09/19/2013 | WO2013136206A1 Look up table-based sum predistorter for power amplifification with concurrent dual band inputs |
| 09/19/2013 | US20130244606 Signal converting apparatus and receiving apparatus for supporting concurrent dual bands in wireless communication system |
| 09/19/2013 | US20130241660 Buck Up Power Converter |
| 09/19/2013 | US20130241659 Power amplifier |
| 09/19/2013 | US20130241658 Power supply circuit and power supply control method |
| 09/19/2013 | US20130241657 Multi-mode doherty power amplifier |
| 09/19/2013 | US20130241656 Power Amplification System Using Doherty Amplifier with Linearization Circuit and Related Techniques |
| 09/19/2013 | US20130241652 Utilizing a sense amplifier to select a suitable circuit |
| 09/19/2013 | US20130241651 Amplifiers and related receiver systems |
| 09/19/2013 | US20130241650 Multi-stage amplifier |
| 09/19/2013 | US20130241649 Regulator with Low Dropout Voltage and Improved Stability |
| 09/19/2013 | US20130241648 Driving circuit, operational amplifier, and data transmitting method thereof |
| 09/19/2013 | US20130241647 Distortion Correction in Class-D Amplifiers |
| 09/19/2013 | US20130241641 Signal amplifier circuit for usb port |
| 09/19/2013 | US20130241640 Reconfigurable input power distribution doherty amplifier with improved efficiency |
| 09/19/2013 | US20130241639 Impedance spreading wideband doherty amplifier circuit with peaking impedance absorption |
| 09/19/2013 | US20130241638 Signal amplifier circuit for usb port |
| 09/19/2013 | US20130241637 Auto-Zeroed Amplifier with Low Input Leakage |
| 09/19/2013 | US20130241625 Multiway Lossless Power Combining and Outphasing Incorporating Transmission Lines |
| 09/19/2013 | DE102012005488A1 Composite-operational amplifier e.g. single-step difference trans-conductance amplifier, has connector formed as amplifier's inverted input, and main-forward signal path whose input is connected with output of auxiliary-forward signal path |
| 09/18/2013 | EP2211461B1 Power amplifier circuit, and transmitter and wireless communication device using the same |
| 09/18/2013 | CN203206184U Current compensating circuit and operational amplifier |
| 09/18/2013 | CN203206183U Differential radio-frequency amplifier |
| 09/18/2013 | CN203205991U Wireless power transmission system applied to high-voltage line equipment power supply |
| 09/18/2013 | CN103314528A Impedance -matching circuits for multi - output power supplies driving C02 gas -discharge lasers |
| 09/18/2013 | CN103314527A Circuit and method for reducing input leakage in chopped amplifier during overload conditions |
| 09/18/2013 | CN103314526A Self-biasing radio frequency circuitry |
| 09/18/2013 | CN103314525A Magnetic bearing drive circuit |
| 09/18/2013 | CN103314524A Dutycycle adjustment to improve efficiency of a digital RF-PA |
| 09/18/2013 | CN103314514A Efficiency-optimizing, calibrated sensorless power/energy conversion in switch-mode power supply |
| 09/18/2013 | CN103312282A Bias voltage generation circuit and differential circuit |
| 09/18/2013 | CN103312281A USB (Universal Serial Bus) signal amplification circuit |
| 09/18/2013 | CN103312280A USB (Universal Serial Bus) signal amplification circuit |
| 09/18/2013 | CN103312279A DE type power amplifier and design method thereof |
| 09/18/2013 | CN103312278A Power control system for radio-frequency power amplifier |
| 09/18/2013 | CN103312277A High-frequency amplifier |
| 09/18/2013 | CN103312274A Digital control method for feedforward amplifier and digitalized feedforward amplifier |
| 09/18/2013 | CN103312273A Circuit device for inhibiting temperature effect of LDMOS (laterally diffused metal oxide semiconductor) power amplifier |
| 09/18/2013 | CN103312270A Power amplifier |
| 09/18/2013 | CN103310743A Driving circuit, operational amplifier, and data transmitting method thereof |
| 09/18/2013 | CN102067444B Improved filter for switched mode power supply |
| 09/18/2013 | CN102055415B High-frequency amplifier and radio communication apparatus |
| 09/18/2013 | CN101834575B 运算放大器 Operational Amplifiers |
| 09/18/2013 | CN101764580B Adaptive bias circuit for controlling operation of amplifier and power amplifier system |
| 09/17/2013 | US8538354 Method and system for controlling signal transmission of a wireless communication device |
| 09/17/2013 | US8536950 Multi-stage impedance matching |
| 09/17/2013 | US8536948 Power amplifier |
| 09/17/2013 | US8536947 Class AB amplifier with resistive level-shifting circuitry |
| 09/17/2013 | US8536946 Multi-input operational amplifier and output voltage compensation method thereof |
| 09/17/2013 | US8536945 Differential output stage |
| 09/17/2013 | US8536944 Differential amplifier with de-emphasis |
| 09/17/2013 | US8536942 Power amplifier |
| 09/17/2013 | US8536939 Cross-coupled multipath feedforward operational amplifiers |
| 09/17/2013 | US8536938 Output circuits with class D amplifier |
| 09/14/2013 | CA2808753A1 Systems and methods for compensating the input offset voltage of a comparator |
| 09/12/2013 | WO2013134764A1 Free-fly class d power amplifier |
| 09/12/2013 | WO2013134026A2 Envelope tracking power amplifier system with delay calibration |
| 09/12/2013 | WO2013133697A1 Apparatus and method for processing signals. |
| 09/12/2013 | WO2013133215A1 Doherty amplifier circuit |
| 09/12/2013 | WO2013133170A1 Transmission device |
| 09/12/2013 | WO2013109467A3 Method and apparatus for resource block based transmitter optimization in wireless communication devices |
| 09/12/2013 | US20130236034 Audio output circuit, electronic device using the same, and audio integrated circuit |
| 09/12/2013 | US20130235923 Pulse-Width Modulator and Methods of Implementing and Using the Same |
| 09/12/2013 | US20130235487 Analog tunneling current sensors for use with disk drive storage devices |
| 09/12/2013 | US20130234799 Shared bypass capacitor matching network |
| 09/12/2013 | US20130234798 Amplifier and amplification method |
| 09/12/2013 | US20130234797 Broadband Transistor Bias Network |
| 09/12/2013 | US20130234796 Current-mode cmos logarithmic function circuit |
| 09/12/2013 | US20130234795 Free-fly class d power amplifier |
| 09/12/2013 | US20130234794 Microwave semiconductor amplifier |
| 09/12/2013 | US20130234792 Time difference amplifier circuit |
| 09/11/2013 | EP2637303A2 Amplification apparatus |
| 09/11/2013 | EP2637302A1 Microwave semiconductor amplifier |
| 09/11/2013 | EP2637301A1 Circuit, communication device and method for protecting power amplifier |
| 09/11/2013 | CN203193626U Radio frequency power amplification device |