| 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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| 12/30/2004 | US20040263247 Integrated power amplifier circuit |
| 12/30/2004 | US20040263246 Multi-mode multi-amplifier architecture |
| 12/30/2004 | US20040263245 Polar and linear amplifier system |
| 12/30/2004 | US20040263244 Power amplifier |
| 12/30/2004 | US20040263243 BTL amplifier capable of providing stability of offset compensation |
| 12/30/2004 | US20040263242 Composite amplifier |
| 12/30/2004 | DE10326581A1 Device for emulating acoustic characteristics of valve power amplifiers e.g. for electric guitar, is provided with discrete modules for emulation of acoustic characteristics |
| 12/30/2004 | DE102004004609A1 Verstärker mit fester Eingangsimpedanz, betrieben in verschiedenen Verstärkungsmodi Amplifier with a fixed input impedance, operated in different gain modes |
| 12/29/2004 | WO2004114519A1 Apparatus and method to provide power amplification |
| 12/29/2004 | WO2004114518A1 Cartesian loop transmitter and method of adjusting an output level of such transmitter |
| 12/29/2004 | WO2004114517A1 Power amplification device |
| 12/29/2004 | WO2004114516A1 Power control for a transmitter |
| 12/29/2004 | EP1492229A1 Polar and linear amplifier system |
| 12/29/2004 | EP1492228A1 Multi-mode multi-amplifier architecture |
| 12/29/2004 | EP1492227A1 Multi-mode amplifier system |
| 12/29/2004 | EP1492211A1 Method and circuit for protecting a battery operated electronic device |
| 12/29/2004 | EP1490964A1 Power amplifier array with same type predistortion amplifier |
| 12/29/2004 | EP1433250A4 An adaptive linearization technique for communication building block |
| 12/29/2004 | CN1558569A Active integration antenna of back feed type rectangular micro band antenna and front level low noise amplifier non-matched circuit |
| 12/29/2004 | CN1182747C Circuit with effective generation of low-power radio frequency signal |
| 12/28/2004 | US6836671 Amplifier circuitry |
| 12/28/2004 | US6836646 Circuit and method for compensating for non-linear distortion |
| 12/28/2004 | US6836517 Distortion compensating apparatus |
| 12/28/2004 | US6836186 AB class amplifier for controlling quiescent current |
| 12/28/2004 | US6836182 Nested transimpedance amplifier |
| 12/23/2004 | WO2004112244A1 High-frequency amplifier |
| 12/23/2004 | WO2004112242A1 Power amplifier with power control loop |
| 12/23/2004 | WO2004112240A1 Power amplifier pre-distortion |
| 12/23/2004 | WO2004112239A1 Ouput power detection circuit |
| 12/23/2004 | WO2004112238A1 Low-noise amplifier |
| 12/23/2004 | WO2004112237A1 Amplifier impedance matching |
| 12/23/2004 | WO2004112236A1 Method and apparatus for dynamically regulating the supply voltage of a power amplifier |
| 12/23/2004 | WO2004112235A2 Method and system for transmitting signals with reduced spurious emissions |
| 12/23/2004 | WO2004100215A3 N-way rf power amplifier circuit with increased back-off capability and power added efficiency using unequal input power division |
| 12/23/2004 | WO2004059850A3 Apparatus and method for safely handling asynchronous shutdown of pulsewidth modulated output |
| 12/23/2004 | US20040261121 Distributed gain network |
| 12/23/2004 | US20040260521 Method and apparatus for classifying time series data using wavelet based approach |
| 12/23/2004 | US20040259509 Digitally adaptive modulated transmitter |
| 12/23/2004 | US20040258257 Automatic power foldback for audio applications |
| 12/23/2004 | US20040258256 Amplifier circuit with negative feedback |
| 12/23/2004 | US20040258176 Precorrection of nonlinear distortion with memory |
| 12/23/2004 | US20040257963 Low voltage differential signal transmitting circuit and optical disc recording apparatus |
| 12/23/2004 | US20040257266 Technique for changing a range gate and radar coverage |
| 12/23/2004 | US20040257160 Class ab operational amplifier with split folded-cascode structure and method |
| 12/23/2004 | US20040257158 Vacuum tube amplifier |
| 12/23/2004 | US20040257157 Non-linear modeling method |
| 12/23/2004 | US20040257156 Low distortion power amplifier and method of controlling a multi-channel power amplifier |
| 12/23/2004 | US20040257155 Optically isolated bias control circuit |
| 12/23/2004 | DE10321442A1 Driver circuit especially for power amplifiers of high bandwidth has drive stage with a support circuit and current reduction system in case of a fault |
| 12/22/2004 | EP1489803A1 Transmitting method and transmitting apparatus |
| 12/22/2004 | EP1489738A1 Coefficient estimation method and apparatus |
| 12/22/2004 | EP1488541A1 Apparatus, and associated method, for communication system utilizing space-generated multilevel coding |
| 12/22/2004 | EP1488524A2 Floating-gate analog circuit |
| 12/22/2004 | EP1488511A1 An implementation method for pre-distortion of non-linear devices |
| 12/22/2004 | EP1488510A2 A-ab transconductor |
| 12/22/2004 | EP1391046A4 Non-linear transistor circuits with thermal stability |
| 12/22/2004 | EP1238456A4 Improved floating, balanced output circuit |
| 12/22/2004 | EP1216559B1 Method for adjusting a phase angle of a phase modifier of a transmitting device |
| 12/22/2004 | EP1216558B1 Transmitting-receiving device comprising a closed cartesian feedback loop |
| 12/22/2004 | CN1557046A Distortion compensation circuit, distortion compensation signal generating method, and power amplifier |
| 12/22/2004 | CN1556585A Output stage circuit of power amplifier |
| 12/21/2004 | US6833820 Tunable monopole antenna |
| 12/21/2004 | US6833771 High efficiency amplifier with amplifier element, radio transmission device therewith and measuring device therefor |
| 12/21/2004 | US6833760 Low power differential amplifier powered by multiple unequal power supply voltages |
| 12/21/2004 | US6833758 Power amplifier |
| 12/21/2004 | US6833739 Input buffer circuit for semiconductor device |
| 12/16/2004 | WO2004110004A1 Method and system for switching mode power amplification |
| 12/16/2004 | WO2004109943A1 Multiband mixer |
| 12/16/2004 | WO2004109919A1 Digital differential amplification control device |
| 12/16/2004 | WO2004109908A1 Amplification circuit |
| 12/16/2004 | WO2004109907A2 Method and system for correcting non-linear response in amplifiers |
| 12/16/2004 | WO2004109906A1 Amplifier using an analogue switch |
| 12/16/2004 | WO2004109905A1 Output power control for a switching mode power amplifier |
| 12/16/2004 | WO2004070941A3 Monolithic supply-modulated rf power amplifier and dc-dc power converter ic |
| 12/16/2004 | WO2004068704A3 Method for controlling power for a mobile communications terminal |
| 12/16/2004 | WO2003049278A3 Signal processing element |
| 12/16/2004 | WO2003012982A8 Tuned damping circuit for power amplifier output |
| 12/16/2004 | US20040254769 Method for testing semiconductor film, semiconductor device and manufacturing method thereof |
| 12/16/2004 | US20040254768 Workflow mining system and method |
| 12/16/2004 | US20040253938 Multiband mixer |
| 12/16/2004 | US20040252786 Method and system for transmitting signals with reduced spurious emissions |
| 12/16/2004 | US20040252784 Coefficient estimation method and apparatus |
| 12/16/2004 | US20040252783 Signal transmission apparatus and method |
| 12/16/2004 | US20040252437 Device protecting an electronic circuit |
| 12/16/2004 | US20040252359 Energy limiter for amplitude modulated RF waveforms |
| 12/16/2004 | US20040251984 Apparatus and method to provide power amplification |
| 12/16/2004 | US20040251968 Method and apparatus for providing a stable power output of power amplifiers, operating under unstable supply voltage conditions |
| 12/16/2004 | US20040251967 High frequency amplifier circuit |
| 12/16/2004 | US20040251966 Bias circuit for improving linearity of a radio frequency power amplifier |
| 12/16/2004 | US20040251965 Differential amplifier with temperature compensating function |
| 12/16/2004 | US20040251964 Methods and apparatus for substantially reducing nonlinear distortion |
| 12/16/2004 | US20040251963 Methods and apparatus for using taylor series expansion concepts to substantially reduce nonlinear distortion |
| 12/16/2004 | US20040251962 Power control for a switching mode power amplifier |
| 12/16/2004 | US20040251961 Feed forward amplifier employing positive feedback pilot generation |
| 12/16/2004 | US20040251960 Impedance matching low noise amplifier having a bypass switch |
| 12/16/2004 | US20040251959 Method and circuit for improving control of trimming procedure |
| 12/16/2004 | DE10320420A1 Anordnung und Verfahren zur digitalen Vorverzerrung eines komplexen Basisband-Eingangssignals Arrangement and method for digitally predistorting a complex baseband input signal |
| 12/16/2004 | DE102004024112A1 Schaltung zur Messung des Stromes durch einen Leistungs-MOSFET Circuit for measuring the current through a power MOSFET |
| 12/15/2004 | EP1487101A1 Low distortion power amplifier and method of controlling a multi-channel power amplifier |
| 12/15/2004 | EP1487100A1 Multi-channel power amplifier with channels independently self-configuring bridge or single-ended output, particulary for audio applications |