| 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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| 09/02/2008 | US7420410 Variable gain amplifier circuit, method of correcting DC offset of the variable gain amplifying circuit, and radio receiving apparatus |
| 09/02/2008 | US7420405 Electronic isolator |
| 09/02/2008 | US7420152 Wide-range linear output photo sensor circuit |
| 08/28/2008 | WO2008103757A1 Amplifier with integrated filter |
| 08/28/2008 | WO2008102869A1 Transmission control method for wireless communication apparatus, and wireless communication apparatus |
| 08/28/2008 | WO2008102788A1 Programmable low-noise amplifier |
| 08/28/2008 | WO2008084419A3 Predistortion of pulse modulator for correction of slewing distortion |
| 08/28/2008 | WO2008083148A3 Passive headphone equalizing |
| 08/28/2008 | WO2008075318A3 Error correction system for a class-d power stage |
| 08/28/2008 | US20080205897 Linearized trans-impedance amplifier |
| 08/28/2008 | US20080205672 Semiconductor integrated circuit and amplifier for suppressing pop sound while minimizing voltage transition settling time |
| 08/28/2008 | US20080204146 Wireless Communication Unit, Integrated Circuit and Biasing Therefor |
| 08/28/2008 | US20080204136 Distortion compensation apparatus |
| 08/27/2008 | EP1962417A1 Power supply device, signal output apparatus and power supply method |
| 08/27/2008 | EP1961114A2 Enhanced low noise amplifier |
| 08/27/2008 | EP1395491A4 Inserting apparatus and method with controlled, master cycle speed-dependent actuator operations |
| 08/27/2008 | CN201107848Y Low noise amplifier |
| 08/27/2008 | CN101253682A Low noise amplifier circuit and receiving system |
| 08/27/2008 | CN101252352A Semiconductor integrated circuit device and high-frequency power amplifier module |
| 08/27/2008 | CN101252351A Comparator circuit |
| 08/27/2008 | CN101252344A Cryogenic receiving amplifier and amplifying mehtod |
| 08/27/2008 | CN101252341A Wideband low noise amplifier |
| 08/26/2008 | US7418213 Transimpedance amplifier with integrated filtering and reduced parasitic capacitance |
| 08/26/2008 | US7418056 Digital predistorter using power series model |
| 08/26/2008 | US7417499 Gain controlled amplifier and cascoded gain controlled amplifier based on the same |
| 08/26/2008 | US7417498 Amplifier with feedback bridge |
| 08/21/2008 | WO2008099724A1 Linc transmission circuit and communication device using the same |
| 08/21/2008 | WO2008099489A1 Power amplifier |
| 08/21/2008 | WO2008099488A1 Power amplifier |
| 08/21/2008 | WO2008099466A1 Transmitter |
| 08/21/2008 | WO2008099464A1 Power amplifier |
| 08/21/2008 | WO2008004074A3 Method and apparatus for providing adaptive supply voltage control of a power amplifier |
| 08/21/2008 | US20080197930 Digital Amplifier |
| 08/21/2008 | US20080197925 Distortion Compensation Amplifying Apparatus |
| 08/21/2008 | US20080197924 Variable gain amplifier circuit and filter circuit |
| 08/21/2008 | US20080197923 Semiconductor integrated circuit device and high-frequency power amplifier module |
| 08/21/2008 | US20080197921 System and method for minimizing DC offset in outputs of audio power amplifiers |
| 08/21/2008 | US20080197834 Signal detecting circuit |
| 08/20/2008 | EP1959565A1 High efficiency amplifier |
| 08/20/2008 | EP1959564A2 System and method for dynamic drain voltage adjustment to control linearity, output power, and efficiency in RF power amplifiers |
| 08/20/2008 | EP1959563A2 Doherty amplifying apparatus using a harmonic control circuit |
| 08/20/2008 | EP1958331A2 Variable passive components with high resolution value selection and control |
| 08/20/2008 | EP1958328A1 Signal output circuit, communication apparatus and signal output control method |
| 08/20/2008 | EP1502309A4 Integrated circuit with internal impedance matching circuit |
| 08/20/2008 | EP1380106B1 Tunable matching circuit |
| 08/20/2008 | EP1245078B1 Power amplifier and a method for operating a power amplifier |
| 08/20/2008 | CN101247110A Push-pull power amplifier without matching amplifier tube |
| 08/20/2008 | CN101247109A Efficiency self-adaptive regulating power amplifier and implementing method thereof |
| 08/20/2008 | CN101247108A Integrated digital predistortion power amplifier |
| 08/20/2008 | CN100413219C Transmitting apparatus |
| 08/20/2008 | CN100413213C Power control and modulation of switched-mode power amplifiers with one or more stages |
| 08/20/2008 | CN100413212C High frequency power amplifer, module of high frequency power amplifer and mobile telephone |
| 08/20/2008 | CN100413210C Modulation circuit device, modulation method and radio communication device |
| 08/20/2008 | CN100413072C Semiconductor integrated circuit device |
| 08/19/2008 | US7415252 Arrangement and method for digital predistortion of a complex baseband input signal |
| 08/19/2008 | US7415250 Distortion compensating amplifier |
| 08/19/2008 | US7414821 Semiconductor integrated circuit device |
| 08/19/2008 | US7414481 Receiver with colpitts differential oscillator, colpitts quadrature oscillator, and common-gate low noise amplifier |
| 08/19/2008 | US7414470 Predistortion amplifier for compensation distortion |
| 08/19/2008 | US7414465 Amplifier arrangement |
| 08/19/2008 | US7414464 Op driver with the function of canceling op offset |
| 08/14/2008 | US20080191806 High frequency power amplifier circuit, high frequency power amplifier electronic component and method thereof |
| 08/14/2008 | US20080191800 Dual-chopper amplifier and its usage as readout circuit for capacitive sensors |
| 08/14/2008 | US20080190203 Signal Amplifying Circuit and Acceleration Sensor Having the Same |
| 08/14/2008 | DE202007017887U1 Verzerrungs- und Rauschunterdrückungssystem für HFC (Hybrid Fiber Coax)-Netzwerke Distortion and noise reduction system for HFC (Hybrid Fiber Coax) networks |
| 08/13/2008 | EP1955437A1 Small signal amplifier with large signal output boost stage |
| 08/13/2008 | EP1900101A4 Switched capacitor system with and method for output glitch reduction |
| 08/13/2008 | EP1399792B1 Self-bootstrapping transducer interface |
| 08/13/2008 | EP1396079B1 Multi-level power amplifier |
| 08/13/2008 | EP1234376B1 Amplifier stabilisation |
| 08/13/2008 | EP0981819B1 Optical read/write apparatus |
| 08/13/2008 | CN101243609A Reconfigurable transmitter |
| 08/13/2008 | CN101242165A High pass filter circuit with low corner frequency |
| 08/13/2008 | CN101242159A Systems and methods for power amplifiers with voltage boosting multi-primary transformers |
| 08/13/2008 | CN100411316C Switch apparatus, switchable power amplification apparatus, and mobile communication terminal apparatus |
| 08/13/2008 | CN100411300C Distortion compensator |
| 08/12/2008 | US7412469 Power amplifier pre-distorter training |
| 08/12/2008 | US7412213 Envelope limiting for polar modulators |
| 08/12/2008 | US7412006 Method and apparatus for RF carrier feedthrough suppression |
| 08/12/2008 | US7411449 Composite power amplifier |
| 08/12/2008 | US7411448 Class-D amplifier |
| 08/12/2008 | US7411446 DC offset cancellation circuit |
| 08/07/2008 | WO2008095145A1 Low rf interference switching amplifier and method |
| 08/07/2008 | WO2008094269A1 Chopper-stabilized instrumentation amplifier for impedance measurement |
| 08/07/2008 | WO2008093665A1 Power voltage forming device and polar modulation transmission device |
| 08/07/2008 | WO2008093404A1 Transmission circuit, wireless base station apparatus, and wireless terminal device |
| 08/07/2008 | US20080188195 LNA gain adjustment in an RF receiver to compensate for intermodulation interference |
| 08/07/2008 | US20080187035 Non-linear distortion detection method and distortion compensation amplifying device |
| 08/07/2008 | US20080186102 Front end for an instrumentation amplifier |
| 08/07/2008 | US20080186097 Audio power amplifier apparatus |
| 08/07/2008 | US20080186096 System and method for distortion cancellation in amplifiers |
| 08/07/2008 | US20080186095 Amplification apparatus |
| 08/07/2008 | US20080186093 Switched capacitor amplifier with higher gain and improved closed-loop gain accuracy |
| 08/07/2008 | US20080186092 Shared linearity maintenance in power amplifiers |
| 08/07/2008 | US20080186090 Audio system with power-on/off noise suppression and audio amplifier thereof |
| 08/06/2008 | EP1953913A1 Distortion compensating device |
| 08/06/2008 | EP1353438B1 Feedforward amplifier, communication apparatus, feedforward amplifying method, program and medium |
| 08/06/2008 | CN101238638A Data processing method, pre-distortion arrangement, transmitter, network element and base station |
| 08/06/2008 | CN101237222A Protection circuit of power amplifier |
| 08/06/2008 | CN101237221A Amplification apparatus |