| Patents for H03F 1 - Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements (30,272) |
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| 10/01/2009 | CA2717296A1 Method and apparatus for compensating for gain changes in an amplifier circuit |
| 09/30/2009 | EP2106022A1 Amplification apparatus and amplifier failure detecting method |
| 09/30/2009 | EP2106021A1 Converting circuit for converting differential signal to single-ended signal |
| 09/30/2009 | EP2104980A2 Enhanced doherty amplifier with asymmetrical semiconductors |
| 09/30/2009 | EP2104979A2 Power amplifier |
| 09/30/2009 | EP1721386B1 Differential stage voltage offset trim circuitry |
| 09/30/2009 | EP1198880B1 Arrangement comprising a first and a second amplifier whereby a maximum of one of said amplifiers amplifies |
| 09/30/2009 | CN101546988A Noise filter and noise-filter-incorporated amplifier circuit |
| 09/30/2009 | CN101546985A Amplifying element and manufacturing method thereof |
| 09/30/2009 | CN100546174C Adjusting circuit and method for adjusting amplitude of radio frequency signal |
| 09/30/2009 | CN100546173C Temperature compensating circuit |
| 09/30/2009 | CN100546172C Signal output circuit |
| 09/29/2009 | US7595845 Television switch module |
| 09/29/2009 | US7595794 Circuit having source follower and semiconductor device having the circuit |
| 09/29/2009 | US7595704 System and apparatus for a three-line balun with power amplifier bias |
| 09/29/2009 | US7595696 Power amplifier |
| 09/29/2009 | US7595695 Compensated operational amplifier and active RC filter including such an amplifier |
| 09/29/2009 | US7595689 Predistorter |
| 09/29/2009 | US7595648 Device and method for reading a capacitive sensor, in particular of a micro-electromechanical type |
| 09/24/2009 | US20090238581 Optical signal receiving circuit |
| 09/24/2009 | US20090237158 Electronic device having a predistortion filter and related methods |
| 09/24/2009 | US20090237156 Power amplifiers having improved startup linearization and related operating methods |
| 09/23/2009 | EP2104297A2 Transmission apparatus and transmission method |
| 09/23/2009 | EP2102981A2 Reconfigurable power amplifier and use of such amplifier for making a multistandard amplification stage for mobile phone communications |
| 09/23/2009 | EP2102980A1 Power amplifier bias control |
| 09/23/2009 | EP1639700B1 Cartesian loop transmitter and method of adjusting an output level of such transmitter |
| 09/23/2009 | EP1442518B1 Operational amplifier with chopped input transistor pair |
| 09/23/2009 | EP1399746B1 Image sensor utilizing a low fpn high gain capacitive transimpedance amplifier |
| 09/23/2009 | CN201315565Y Power amplifier circuit and multimedia player |
| 09/23/2009 | CN201315564Y Digital power amplifying and starting control circuit |
| 09/23/2009 | CN101542897A High frequency amplifier |
| 09/23/2009 | CN101540588A Class d audio amplifier |
| 09/23/2009 | CN101540587A Audio power amplifier and a pre-amplifier thereof |
| 09/23/2009 | CN101540585A Amplifier |
| 09/23/2009 | CN100544194C Feedforward distortion compensation amplifier |
| 09/23/2009 | CN100544193C Predistortion device and amplifier with distortion compensation function for predistortion |
| 09/23/2009 | CN100544192C Audio amplifier and method |
| 09/23/2009 | CN100544191C Transmitter and its power control method |
| 09/23/2009 | CN100544190C Superhigh speed high-efficient amplifier |
| 09/23/2009 | CN100543631C Constant voltage outputting circuit |
| 09/22/2009 | US7593699 Distortion/efficiency adaptation in a variable-data-rate radio transmitter |
| 09/22/2009 | US7593480 Transmission device and radio communication device |
| 09/22/2009 | US7592866 Widebrand differential amplifier including single-ended amplifiers coupled to a four-port transformer |
| 09/17/2009 | WO2009114474A2 Combination offset voltage and bias current auto-zero circuit |
| 09/17/2009 | WO2009114023A1 System and method of using residual voltage from a prior operation to establish a bias voltage for a subsequent operation |
| 09/17/2009 | WO2009114021A1 System and method of enabling a signal processing device in a relatively fast manner to process a low duty cycle signal |
| 09/17/2009 | WO2009113329A1 Communication device, distortion compensation circuit, and distortion compensation method |
| 09/17/2009 | WO2009112889A1 Power detector |
| 09/17/2009 | WO2009112494A1 Floating front-end amplifier and one-wire measuring devices |
| 09/17/2009 | US20090231042 Broadband Power Amplifier with A High Power Feedback Structure |
| 09/17/2009 | US20090231031 High-impedance level-shifting amplifier capable of handling input signals with a voltage magnitude that exceeds a supply voltage |
| 09/17/2009 | US20090231029 Combination offset voltage and bias current auto-zero circuit |
| 09/16/2009 | EP2101410A1 Transmitting device and communication device |
| 09/16/2009 | EP2101409A1 Power amplification device |
| 09/16/2009 | EP2101408A1 Floating front-end amplifier and one-wire measuring devices |
| 09/16/2009 | EP1201025B1 Driving circuits for switch mode rf power amplifiers |
| 09/16/2009 | CN101536307A Amplification device |
| 09/16/2009 | CN101536306A Notch filter for ripple reduction in chopper stabilized amplifiers |
| 09/16/2009 | CN101534133A Wireless transceiver |
| 09/16/2009 | CN101534095A Power amplifier capable of treating noise |
| 09/16/2009 | CN101534094A Compensating circuit |
| 09/16/2009 | CN101534093A Final three-route power synthesizing amplifying circuit applied to power amplifier of mobile communication base station system |
| 09/16/2009 | CN100542016C Electronic circuit for amplification of a bipolar signal |
| 09/16/2009 | CN100542012C A low-noise amplifier for radio communication and navigation receiver and its realization method |
| 09/16/2009 | CN100542011C Integrated doherty type amplifier arrangement with high power efficiency |
| 09/15/2009 | US7590251 Clip detection in PWM amplifier |
| 09/15/2009 | US7589593 Amplifier circuit having stacked main amplifier and parallel sub-amplifier |
| 09/15/2009 | US7589589 Power amplifying apparatus and mobile communication terminal |
| 09/15/2009 | US7589588 High-frequency power amplifier and radio communication equipment using the same |
| 09/15/2009 | US7589587 Feedback amplifier circuit operable at low voltage by utilizing switched operational amplifier and chopper modulator |
| 09/11/2009 | WO2009109808A2 Baseband-derived rf digital predistortion |
| 09/10/2009 | US20090224828 Distortion Compensation Amplification Device And Correction Method |
| 09/10/2009 | US20090224827 Split-feedback Technique for Improving Load Regulation in Amplifiers |
| 09/09/2009 | EP2097974A2 Doherty amplifier system |
| 09/09/2009 | EP2097973A1 Dynamic range improvements of load modulated amplifiers |
| 09/09/2009 | EP1908167B1 Compensation for parasitic coupling between rf or microwave transistors in the same package |
| 09/09/2009 | EP1363394B1 Switching power amplifier, and switching control method of the switching power amplifier |
| 09/09/2009 | CN201307846Y Protection circuit for protecting power amplifier |
| 09/09/2009 | CN201307845Y Driving circuit |
| 09/09/2009 | CN101527546A D-type power amplifier |
| 09/09/2009 | CN101527545A Doherty envelope tracking power amplifier and method for treating radio frequency signal |
| 09/09/2009 | CN101527544A Device and method for identifying inverse characteristic of nonlinear system, power amplifier and predistorter thereof |
| 09/09/2009 | CN101527543A Audio system capable of suppressing switch noise and audio amplifier |
| 09/09/2009 | CN101527542A Minimized common mode oscillation multistage amplifier circuits, method, and integrated circuit |
| 09/09/2009 | CN100539449C Activation signal output circuit |
| 09/09/2009 | CN100539402C Automatic LDMOS biasing with long term hot carrier compensation |
| 09/09/2009 | CN100539401C Method and device for amplifying a reception signal |
| 09/09/2009 | CN100539400C High efficiency amplifier |
| 09/09/2009 | CN100539399C System and method for control of loop alignment in adaptive feed forward amplifiers |
| 09/08/2009 | US7587175 Radio frequency unit analog level detector and feedback control system |
| 09/08/2009 | US7586387 Electronic device and method of matching the impedance thereof |
| 09/08/2009 | US7586368 Simultaneous filtering and compensation circuitry and method in chopping amplifier |
| 09/03/2009 | WO2009107263A1 Signal reproducing device |
| 09/03/2009 | WO2009106632A1 Improved control loop for amplification stage |
| 09/03/2009 | WO2009106631A1 Transformer based voltage combiner with inductive shunt |
| 09/03/2009 | WO2009106628A1 Improved filter for switched mode power supply |
| 09/03/2009 | WO2009106183A1 Electronic device for microwave apparatuses onboard a satellite |
| 09/03/2009 | WO2009088813A3 Multi-linearity mode lna having a deboost current path |
| 09/03/2009 | WO2009059051A3 Earhealth monitoring system and method i |
| 09/03/2009 | US20090219088 Apparatus and method for correcting non-linear distortion based on characteristic modeling of high power amplifier |