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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:

Patent Number Title Of Patent Date Issued
6252915 System and method for gaining control of individual narrowband channels using a wideband power measurement Jun. 26, 2001
6242975 Envelope peak and trough limiting to improve amplifier efficiency and distortion characteristics Jun. 5, 2001
6242979 Linearization using parallel cancellation in linear power amplifier Jun. 5, 2001
6239657 Method and device for measuring the distortion of a high-frequency power amplifier and method and means for automatically equalizing a high-frequency power amplifier May. 29, 2001
6240144 Apparatus and method of linearizing a power amplifier in a mobile radio communication system May. 29, 2001
6236837 Polynomial Predistortion linearizing device, method, phone and base station May. 22, 2001
6229391 Adaptation method and amplifier arrangement May. 8, 2001
6211733 Predistortion compensation for a power amplifier Apr. 3, 2001
6211734 Active distortion signal generating circuit for a line-distortion type power amplifier Apr. 3, 2001
6208686 System and method for dynamic amplitude adjustment of modulating signal in frequency modulated transceivers Mar. 27, 2001
6205171 Antenna selector switch Mar. 20, 2001
6188732 Digital feedforward amplifier for use in an RF transmitter and method of operation Feb. 13, 2001
6173016 Transmission method, transmission apparatus and reception method and reception apparatus Jan. 9, 2001
6166598 Power amplifying circuit with supply adjust to control adjacent and alternate channel power Dec. 26, 2000
6166599 Impedance matching networks for non-linear circuits Dec. 26, 2000
6167242 Offset voltage cancellation system for radio frequency power controllers Dec. 26, 2000
6160449 Power amplifying circuit with load adjust for control of adjacent and alternate channel power Dec. 12, 2000
6144694 Transmitting apparatus for code division multiplexed signals Nov. 7, 2000
6141390 Predistortion in a linear transmitter using orthogonal kernels Oct. 31, 2000
6137840 Method and apparatus for performing fast power control in a mobile communication system Oct. 24, 2000
6130910 Method and apparatus for high efficiency wideband power amplification Oct. 10, 2000
6108385 Method and apparatus for reducing intermodulation distortion in digital wideband transmission systems Aug. 22, 2000
6091941 Radio apparatus Jul. 18, 2000
6084920 Diode detector Jul. 4, 2000
6081698 Radio apparatus and offset compensating method Jun. 27, 2000
6081158 Adaptive pre-distortion apparatus for linearizing an amplifier output within a data transmission system Jun. 27, 2000
6075411 Method and apparatus for wideband predistortion linearization Jun. 13, 2000
6075412 Linearization for power amplifiers Jun. 13, 2000
6049707 Broadband multicarrier amplifier system and method using envelope elimination and restoration Apr. 11, 2000
6046649 Communication system employing paired power amplifiers and drift compensation feedback control loops Apr. 4, 2000
6041081 CDMA transmitter having a variable gain circuit inserted between a transmitter mixer and a transmitter antenna Mar. 21, 2000
6029285 Adaptive compensation of RF amplifier distortion by injecting predistortion signal derived from respectively different functions of input signal amplitude Feb. 29, 2000
6016304 RF phase and/or amplitude control device Jan. 18, 2000
5987307 Power control in wireless radio tranceivers Nov. 16, 1999
5978421 Envelope control unit and digital modulator using the envelope control unit and digital modulation method Nov. 2, 1999
5974093 Device and method for automatically controlling transmission power Oct. 26, 1999
5960333 Circuitry and method for power calibration Sep. 28, 1999
5959500 Model-based adaptive feedforward amplifier linearizer Sep. 28, 1999
5949283 Adaptive digital predistortion linearization and feed-forward correction of RF power amplifier Sep. 7, 1999
5937011 Multi-carrier high power amplifier using digital pre-distortion Aug. 10, 1999
5930301 Up-conversion mechanism employing side lobe-selective pre-distortion filter and frequency replica-selecting bandpass filter respectively installed upstream and downstream of digital-to-analog Jul. 27, 1999
5923712 Method and apparatus for linear transmission by direct inverse modeling Jul. 13, 1999
5915213 Transmitter apparatus with linearizing circuit to compensate for distortion in power amplifier Jun. 22, 1999
5909642 Nonlinear distortion detecting circuit and nonlinear distortion compensating circuit for transmitter Jun. 1, 1999
5905760 Method of correcting nonlinearities of an amplifier, and radio transmitter employing a method of this type May. 18, 1999
5903611 Method of correcting nonlinearities of an amplifier, and radio transmitter employing a method of this type May. 11, 1999
5903823 Radio apparatus with distortion compensating function May. 11, 1999
5883927 Digital wireless telecommunication device for reduced interference with hearing aids Mar. 16, 1999
5870016 Power line carrier data transmission systems having signal conditioning for the carrier data signal Feb. 9, 1999
5864586 Radio apparatus with offset compensating circuit Jan. 26, 1999

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