| 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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| 09/21/2004 | US6794938 Method and apparatus for cancellation of third order intermodulation distortion and other nonlinearities |
| 09/21/2004 | US6794937 Predistortion linearizer and method for linearizing a nonlinear device |
| 09/21/2004 | US6794936 Equalizer system and method for predistortion |
| 09/21/2004 | US6794935 Power amplification circuit and method for supplying power at a plurality of desired power output levels |
| 09/21/2004 | US6794934 High gain wideband driver amplifier |
| 09/21/2004 | US6794933 Fast forward RF power amplifier with high efficiency main amplifier and highly linear error amplifier |
| 09/21/2004 | US6794931 Switched amplifier |
| 09/21/2004 | US6794930 Signal quality |
| 09/16/2004 | WO2004080023A1 Phase & envelope generation in an eer system |
| 09/16/2004 | WO2004042917A3 Sense amplifier thermal correction scheme |
| 09/16/2004 | US20040180634 Signal sample acquisition techniques |
| 09/16/2004 | US20040179629 Digital predistorter for a wideband power amplifier and adaptation method |
| 09/16/2004 | US20040179587 Signal sample acquisition techniques |
| 09/16/2004 | US20040179387 Multi-channel digital feedback reducer system |
| 09/16/2004 | US20040178854 Semiconductor device having balanced circuit for use in high frequency band |
| 09/16/2004 | US20040178853 Rf power amplifier with low intermodulation distortion and reduced memory effect |
| 09/16/2004 | US20040178852 Apparatus and method of limiting power applied to a loudspeaker |
| 09/16/2004 | US20040178848 System and method for adjusting group delay |
| 09/16/2004 | DE10300011B4 Subtrahiererschaltung und Leistungsdetektoranordnung mit der Subtrahiererschaltung Subtractor circuit and power detector arrangement with the subtractor circuit |
| 09/15/2004 | EP1456942A1 Time division multiplexed pwm amplifier |
| 09/15/2004 | EP1205024B1 Amplifier measurement and modeling processes for use in generating predistortion parameters |
| 09/15/2004 | EP1203445B1 A wideband digital predistortion linearizer for nonlinear amplifiers |
| 09/15/2004 | EP1203444B1 Digital predistortion methods for wideband amplifiers |
| 09/15/2004 | EP1186149A4 Loop driver for pots, xdsl, or integrated pots/xdsl interface |
| 09/15/2004 | EP1101280B1 A set-up method for a linearising circuit |
| 09/15/2004 | CN1529935A Triple class E. Doherty amplifier topology for hight efficiency signal transmitters |
| 09/15/2004 | CN1529934A Preamplification circuit |
| 09/15/2004 | CN1529933A Method for controlling amplification of high-frequency signal |
| 09/15/2004 | CN1529408A Low-Volage high-linearity radio-frequency amplifier for on-chip impedance match |
| 09/15/2004 | CN1167188C Amplifier |
| 09/15/2004 | CN1167187C Distortion compensation apparatus |
| 09/15/2004 | CN1167186C Feedback signal amplifying treating method |
| 09/15/2004 | CN1167185C Feedforward linear powder amplifier circuit and the method of counteracting AC modulation signal in carrier signal directly |
| 09/14/2004 | US6792252 Wideband error amplifier |
| 09/14/2004 | US6792251 Arrangement and method for improving multi-carrier power amplifier efficiency |
| 09/14/2004 | US6792121 Audio signal amplifier circuit and portable telephone set and portable electronic device using the same audio signal amplifier circuit |
| 09/14/2004 | US6791419 Constant gain, constant phase RF power block |
| 09/14/2004 | US6791418 Capacitor coupled dynamic bias boosting circuit for a power amplifier |
| 09/14/2004 | US6791417 N-way RF power amplifier circuit with increased back-off capability and power added efficiency using selected phase lengths and output impedances |
| 09/14/2004 | US6791416 Variable gain amplifier with adjustable gain slope |
| 09/14/2004 | US6791414 Signal processing stage and radio frequency tuner |
| 09/14/2004 | US6791411 Power amplifier and a method for operating a power amplifier |
| 09/14/2004 | US6791410 Feedforward amplifier and method of improving the performance thereof |
| 09/14/2004 | US6791409 Feedforward amplifier and feedforward amplification method |
| 09/14/2004 | US6791407 Switchable power amplifier |
| 09/14/2004 | US6791406 Power servo-loop, an RF signal amplifier circuit, and an RF signal transmitter fitted with such a circuit |
| 09/10/2004 | WO2004077664A1 A method and a device for adjusting power amplifier properties |
| 09/10/2004 | WO2004077662A1 Power amplifying device for communication system |
| 09/10/2004 | WO2004077661A1 Power amplifying device |
| 09/10/2004 | WO2004034667A3 Electromagnetic wave trasmitter systems, methods and articles of manufacture |
| 09/09/2004 | US20040176955 Method and system for digitally controlling a multi-channel audio amplifier |
| 09/09/2004 | US20040176153 Transmitter control circuit |
| 09/09/2004 | US20040176053 Mobile telecommunication apparatus having a power amplifier which operates stably during changes in control voltage and temperature |
| 09/09/2004 | US20040176049 RF transmitters with saturation detection and correction and methods therefor |
| 09/09/2004 | US20040175007 Semiconductor integrated circuit and amplifier for suppressing pop sound while minimizing voltage transition settling time |
| 09/09/2004 | US20040174836 Method for controlling the operating point of a transistor of a power amplifyer |
| 09/09/2004 | US20040174221 Preamplification circuit |
| 09/09/2004 | US20040174220 Tunable power amplifier matching circuit |
| 09/09/2004 | US20040174219 High frequency power amplifier module and wireless communication apparatus |
| 09/09/2004 | US20040174217 Method and device for switch-on current limiting in push-pull amplifying power stages |
| 09/09/2004 | US20040174216 Highly linear low voltage rail-to-rail input/output operational amplifier |
| 09/09/2004 | US20040174214 Accurate power detection for a multi-stage amplifier |
| 09/09/2004 | US20040174213 Doherty bias circuit to dynamically compensate for process and environmental variations |
| 09/09/2004 | US20040174212 Doherty amplifier using adaptive bias control |
| 09/08/2004 | EP1455445A1 Digital amplification device |
| 09/08/2004 | EP1455444A1 Device and method for predistorting an input signal |
| 09/08/2004 | EP1455443A1 Method for controlling the operating point of a transistor of a power amplifier |
| 09/08/2004 | CN1528047A Circuit for low noise, fully differential amplification |
| 09/08/2004 | CN1527583A Transmission circuit |
| 09/08/2004 | CN1527486A nonlinear element power transmitter |
| 09/08/2004 | CN1527478A Doherty amplifier utilizing adaptive bias control |
| 09/08/2004 | CN1527477A Method for controlling power amplifier transistor working point |
| 09/08/2004 | CN1166138C Adaptive digital pre-distortion method and device for wideband transmitter |
| 09/08/2004 | CN1166054C Differential amplifier, integrated circuit, and telephone |
| 09/08/2004 | CN1166053C Adaptive RF digital pre-distortion linearization method and circuit |
| 09/07/2004 | US6788169 Amplifier composite triple beat (CTB) reduction by phase filtering |
| 09/07/2004 | US6788151 Variable output power supply |
| 09/07/2004 | US6788150 Linear power amplifier |
| 09/07/2004 | US6788148 Voltage-limited distributed current source for ultra-broadband impedance termination |
| 09/07/2004 | US6788146 Capacitor compensation in miller compensated circuits |
| 09/07/2004 | US6788145 Circuit configuration for producing exponential predistortion for a variable amplifier |
| 09/07/2004 | US6788140 Ultra-low distortion, wide-bandwidth amplifier architecture using actively phase-matched feed-forward linearization |
| 09/07/2004 | US6788139 Broadband predistortion linearizer |
| 09/07/2004 | US6788137 Switching amplifier and signal amplifying method |
| 09/07/2004 | US6787398 Method of fabricating a high frequency signal amplification device |
| 09/02/2004 | WO2004075399A1 Logic low noise amplifier and amplification control method thereof |
| 09/02/2004 | WO2004075398A1 High efficiency amplification |
| 09/02/2004 | WO2004075397A2 Enhanced efficiency feed forward power amplifier utilizing reduced cancellation bandwidth and small error amplifier |
| 09/02/2004 | WO2004075395A1 Efficient modulation of rf signals |
| 09/02/2004 | WO2004015860A3 Ring triggered mute |
| 09/02/2004 | WO2004015859A3 Variable gain amplifier with improved control characteristics linearity |
| 09/02/2004 | US20040172222 System and method for notification and escalation of medical data |
| 09/02/2004 | US20040171397 Power amplification device, in particular for a cellular mobile telephone |
| 09/02/2004 | US20040169559 Methods and apparatus for substantially reducing third order intermodulation distortion and other nonlinear distortions |
| 09/02/2004 | US20040169558 Adaptive linearizer for RF power amplifiers |
| 09/02/2004 | US20040169557 Signal processing apparatus |
| 09/02/2004 | US20040169555 Differential amplifier circuit with common mode output voltage regulation |
| 09/02/2004 | US20040169551 Active filter circuit with dynamically modifiable gain |
| 09/02/2004 | US20040169129 Optical receiver |
| 09/02/2004 | CA2515689A1 Enhanced efficiency feed forward power amplifier utilizing reduced cancellation bandwidth and small error amplifier |