| 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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| 08/06/2008 | CN100409567C Amplifier circuit, transmission device, amplification method and transmission method |
| 08/06/2008 | CN100409566C Method and device for operating emission amplifier |
| 08/06/2008 | CN100409565C Variable bias control for switch mode RF amplifier |
| 08/05/2008 | US7409193 Predistortion circuit for a transmit system |
| 08/05/2008 | US7409010 Method and system for transmitting signals with reduced spurious emissions |
| 08/05/2008 | US7409004 Hybrid polar modulator differential phase Cartesian feedback correction circuit for power amplifier linearization |
| 08/05/2008 | US7408408 Predistorter for power amplifier |
| 08/05/2008 | US7408405 High-frequency power amplifier module |
| 08/05/2008 | US7408404 Preserving linearity of an isolator-free power amplifier by dynamically switching active devices |
| 08/05/2008 | US7408402 Operational amplifier with less offset voltage |
| 07/31/2008 | WO2008091730A1 System and method for reducing noise in sensors with capacitive pickup |
| 07/31/2008 | WO2008090721A1 Power amplifier |
| 07/31/2008 | WO2008090712A1 Power amplifier |
| 07/31/2008 | WO2008090613A1 Distortion compensating apparatus |
| 07/31/2008 | WO2008090598A1 Amplifier |
| 07/31/2008 | WO2008090053A1 Transconductance amplifier with a filter for rejecting noise outside the useful band |
| 07/31/2008 | US20080180559 Apparatus, methods and systems for amplifier |
| 07/31/2008 | US20080180177 Methods and apparatus to detect impedance at an amplifier output |
| 07/31/2008 | US20080180171 System and method for combining stepped drain bias control with digital predistortion for a power amplifier |
| 07/31/2008 | US20080180170 System and method for controlling radio frequency transmissions from an electronic device |
| 07/31/2008 | US20080180168 Amplifier, transmitter arrangement having an amplifier and method for amplifying a signal |
| 07/31/2008 | DE102008003396A1 Systeme und Verfahren für Leistungsverstärker mit spannungsanhebenden Multi-Primärtransformatoren Systems and methods for power amplifier with voltage-raising multi-primary transformers |
| 07/30/2008 | EP1950883A1 System and method for filtering harmonics of a power amplifier |
| 07/30/2008 | EP1949534A1 Amplifier |
| 07/30/2008 | EP1949533A2 Monolithic lna support ic |
| 07/30/2008 | EP1756943A4 Automatic current reduction biasing technique for rf amplifier |
| 07/30/2008 | EP1456943B1 Attenuation control for digital power converters |
| 07/30/2008 | EP1356586B1 Method of linearising a signal |
| 07/30/2008 | EP1311062B1 Method for optimising the efficiency of an amplifier for multicarrier signals |
| 07/30/2008 | CN101233684A Non-linear distortion detection method and distortion compensation amplifying device |
| 07/30/2008 | CN101233683A Data processing method, transmitter, device, network element and base station |
| 07/30/2008 | CN101233682A Power supply control for amplifier in wireless modem devices |
| 07/30/2008 | CN101233681A RF transmitter with compensation of differential path delay |
| 07/30/2008 | CN101232273A Differential common collector amplifying circuit |
| 07/30/2008 | CN100407572C 场效应管偏置电路 FET bias circuit |
| 07/30/2008 | CN100406356C Power amplifier circuit with increased back-off capability and power added efficiency |
| 07/29/2008 | US7405680 Distortion compensator |
| 07/29/2008 | US7405623 Sensing circuit |
| 07/29/2008 | US7405619 Amplification circuit improved with linearity and frequency converter using the same |
| 07/29/2008 | US7405617 Dynamic biasing system for an amplifier |
| 07/29/2008 | US7405616 Nested transimpendance amplifier |
| 07/29/2008 | US7405614 Circuit arrangement having an amplifier arrangement and an offset compensation arrangement |
| 07/29/2008 | US7405611 Semiconductor integrated circuit device |
| 07/24/2008 | WO2008089182A1 Multi-stage amplifier with multiple sets of fixed and variable voltage rails |
| 07/24/2008 | WO2008088025A1 Amplification circuit and radio communication device |
| 07/24/2008 | WO2007104055A3 High efficiency load insensitive power amplifier |
| 07/24/2008 | WO2005107060A3 Method and system for compensating for phase variations caused by transmitter activation |
| 07/24/2008 | WO2001099271A3 Management of internal signal levels and control of the net gain for a linc amplifier |
| 07/24/2008 | US20080174382 System method and apparatus for a three-line balun with power amplifier bias |
| 07/24/2008 | US20080174365 Power Amplifier Time-Delay Invariant Predistortion Methods and Apparatus |
| 07/23/2008 | EP1947833A2 Power supply device and method of supplying power supply voltage to load device |
| 07/23/2008 | EP1947762A1 Direct conversion of low power high linearity receiver |
| 07/23/2008 | EP1947640A2 Foot pedal apparatus to provide variable output for electric guitar |
| 07/23/2008 | EP1946444A2 Power conversion regulator with exponentiating feedback loop |
| 07/23/2008 | EP1946443A2 Feedback controller for pwm amplifier |
| 07/23/2008 | EP1946442A2 Wideband circuits and methods |
| 07/23/2008 | EP1946440A1 A transconductance stage arrangement |
| 07/23/2008 | EP1946439A1 Method and arrangement for optimizing efficiency of a power amplifier |
| 07/23/2008 | EP1774649B1 High impedance circuit |
| 07/23/2008 | CN101228778A Semiconductor device, module and electronic device |
| 07/23/2008 | CN101228690A Delay adjusting apparatus |
| 07/23/2008 | CN101228689A Highly efficient amplifier |
| 07/23/2008 | CN101227174A Broad band charge amplifier and design method thereof |
| 07/23/2008 | CN101227172A Simulated D class amplifier |
| 07/23/2008 | CN101227171A Linearisation device with pre-distortion with adjustable amplitude and curve |
| 07/23/2008 | CN100405740C Digital differential amplification control device |
| 07/22/2008 | US7403573 Uncorrelated adaptive predistorter |
| 07/22/2008 | US7403070 Band selection type feed forward amplifier |
| 07/22/2008 | US7403068 Method for double sampling loop negative feedback and double sampling negative feedback amplifier |
| 07/22/2008 | US7403067 Compensation circuit for amplifiers having multiple stages |
| 07/22/2008 | US7403065 Differential transimpedance amplifier circuit for correlated differential amplification |
| 07/22/2008 | US7403064 Dynamically accelerated operational amplifier and method thereof |
| 07/22/2008 | US7403037 Signal amplifier |
| 07/22/2008 | US7403033 MOS linear region impedance curvature correction |
| 07/17/2008 | WO2008052010A8 Method for obtaining a covariance matrix of a transmitting channel in a wireless network |
| 07/16/2008 | EP1523804A4 Variable gain amplifier with autobiasing supply regulation |
| 07/16/2008 | CN101222231A Output circuit, digital analog circuit and display device |
| 07/16/2008 | CN101222211A Peak-hold circuit and signal strength indicator using the peak-hold circuit |
| 07/16/2008 | CN101222208A Protection and automatic restoring system |
| 07/16/2008 | CN101222207A Filterless class D power amplifier |
| 07/16/2008 | CN100403650C Power amplifier protector of double-frequency portable terminal and its protection method |
| 07/16/2008 | CN100403649C Method for controlling power amplifier transistor working point |
| 07/15/2008 | US7401005 Averaging trace function with indexing by a process signal |
| 07/15/2008 | US7400864 Method and apparatus for compensating for phase variations caused by activation of an amplifier |
| 07/15/2008 | US7400863 Switch apparatus, switchable power amplification apparatus, and mobile communication terminal apparatus using the same |
| 07/15/2008 | US7400192 Low noise amplifier and differential amplifier with variable gain mode |
| 07/10/2008 | WO2008083128A1 Two-stage amplification using intermediate non-linear square wave |
| 07/10/2008 | WO2008082059A1 Amplifier with damping resistor in constant current load |
| 07/10/2008 | WO2008081887A1 Δσ modulation digital-analog converter, digital signal processing method, and av device |
| 07/10/2008 | WO2008081632A1 Polar-modulation transmission device |
| 07/10/2008 | US20080164944 Protection and automatic recovery circuit system |
| 07/10/2008 | US20080164943 Predistortion Device Based On Vector Envelope Injection And The Method Thereof |
| 07/10/2008 | US20080164942 Audio data processing apparatus, terminal, and method of audio data processing |
| 07/10/2008 | US20080164940 Miltiple output power mode amplifier |
| 07/09/2008 | EP1942518A2 Base line restoration circuit |
| 07/09/2008 | CN101216526A Feedforward loop circuit synchronous detection device |
| 07/08/2008 | US7398064 Transmitting apparatus |
| 07/08/2008 | US7397404 Digital linearizing system |
| 07/08/2008 | US7397308 Traveling wave amplifier with distributed regenerative feedback between drain-to-drain transmission lines and gate-to-gate transmission lines for enhanced high frequency bandwidth |
| 07/08/2008 | US7397305 High output power amplifier with adjustable voltage transformation ratio of transformer |