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Class Information
Number: 375/297
Name: Pulse or digital communications > Transmitters > Antinoise or distortion (includes predistortion) > Power amplifier
Description: Subject matter including an amplifier which is used for the modulation process in the transmitter.










Patents under this class:
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Patent Number Title Of Patent Date Issued
6809587 Active predistorting linearizer with agile bypass circuit for safe mode operation Oct. 26, 2004
6806780 Efficient modulation compensation of sigma delta fractional phase locked loop Oct. 19, 2004
6798843 Wideband digital predistortion linearizer for nonlinear amplifiers Sep. 28, 2004
6798845 Transmitter for mobile terminal with carrier leak suppressing circuit Sep. 28, 2004
6799021 Method and arrangement for forming an address Sep. 28, 2004
6788744 Power control circuit and transmitter Sep. 7, 2004
6788745 Circuit and method for active termination of a transmission line Sep. 7, 2004
6774716 Feedforward amplifier circuitry Aug. 10, 2004
6775331 Transmission band limiting filter apparatus and transmission apparatus Aug. 10, 2004
6771708 Nonlinear compensator Aug. 3, 2004
6771940 Multi-channel peak power smoothing Aug. 3, 2004
6768434 High speed x/sine(x) correction circuit Jul. 27, 2004
6768779 Pulse referenced control method for enhanced power amplification of a pulse modulated Jul. 27, 2004
6760230 Compact, high efficiency, high isolation power amplifier Jul. 6, 2004
6756845 Method and system for compensating non-linearities and time-varying changes of a transfer function acting on an input signal Jun. 29, 2004
6757338 Predistortion linearizer using even order intermodulation components Jun. 29, 2004
6754285 Signal conditioning techniques in DMT-based transmissions Jun. 22, 2004
6754287 Method and apparatus for producing a modulated signal Jun. 22, 2004
6751265 Method and system of amplitude modulation using dual/split channel unequal amplification Jun. 15, 2004
6751266 RF transmitter employing linear and non-linear pre-correctors Jun. 15, 2004
6751447 Adaptive digital pre-distortion circuit using output reference signal and method of operation Jun. 15, 2004
6741662 Transmitter linearization using fast predistortion May. 25, 2004
6741663 Linearization method for amplifier, and amplifier arrangement May. 25, 2004
6741867 Non-linear distortion compensation circuit, transmitter device to be employed in the same and mobile communication unit May. 25, 2004
6735247 Method and apparatus in a communication system May. 11, 2004
6735419 High efficiency wideband linear wireless power amplifier May. 11, 2004
6731694 Isolator eliminator for a linear transmitter May. 4, 2004
6727750 Amplifier stablilization Apr. 27, 2004
6728299 Transmitter gain control for CDMA signals Apr. 27, 2004
6728366 Signal level adjustment arrangement Apr. 27, 2004
6724831 Pre-distortion apparatus and method thereof Apr. 20, 2004
6721368 Transmitter architectures for communications systems Apr. 13, 2004
6721369 Composite BPSK/AM-BPSK based spectral suppression of out-of-band energy from saturated RF amplifier Apr. 13, 2004
6721370 Phase correction circuit for radio communication apparatus Apr. 13, 2004
6714071 Gate modulation for high power amplifiers Mar. 30, 2004
6714073 Predistortion type distortion compensation amplification apparatus Mar. 30, 2004
6711217 Apparatus and method for linearized power amplification Mar. 23, 2004
6697436 Transmission antenna array system with predistortion Feb. 24, 2004
6693956 Power amplifier having negative feedback circuit for transmitter Feb. 17, 2004
6693974 Adaptive digital pre-distortion circuit using adjacent channel power profile and method of operation Feb. 17, 2004
6693975 Low-order HDSL2 transmit filter Feb. 17, 2004
6690743 Compensation of delay in linearization loop of power amplifier Feb. 10, 2004
6680648 High power amplifier predistorter system Jan. 20, 2004
6677870 Device and method for compensating for nonlinearity of power amplifier with predistortion in IF band Jan. 13, 2004
6674326 Digitally controllable nonlinear pre-equalizer Jan. 6, 2004
6671308 Spread spectrum adaptive power control Dec. 30, 2003
6671329 Power amplifier Dec. 30, 2003
6671330 Power amplifier Dec. 30, 2003
6664852 Apparatus and method for digital control systems Dec. 16, 2003
6657492 System for estimating a non-linear characteristic of an amplifier Dec. 2, 2003

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