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Browse by Category: Main > Electrical & Energy
Class Information
Number: 330/52
Name: Amplifiers > With pilot frequency control means
Description: Subject matter including means for control of the amplifier which may be for control of the bias of an amplifier device electrode or of a variable impedance for the signal channel, wherein the signal input includes a component of a particular frequency not involved in the signal for signal purpose, which is selected by a means in or associated with the amplifier and applied to the control means or used to develop a control voltage applied to the control means.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8472906 Systems and methods for recovery of a sub-carrier signal from a stereophonic multiplexed signal Jun. 25, 2013
8401058 Channelized amplifier system and method Mar. 19, 2013
8369446 Transmitter Feb. 5, 2013
8260238 Systems and methods for recovery of a sub-carrier signal from a stereophonic multiplexed signal Sep. 4, 2012
8238853 Amplitude error de-glitching circuit and method of operating Aug. 7, 2012
8175551 Distortion compensation device for use in high-frequency power amplifier May. 8, 2012
7756493 Feed forward amplifier system and method using the pilot frequency from a positive feedback pilot generation and detection circuit to improve second loop convergence Jul. 13, 2010
7729420 Reconditioning equalizer filter for OFDM and non-OFDM signals Jun. 1, 2010
7684513 Amplifier circuit and amplifying method Mar. 23, 2010
7684774 Systems and methods for recovery of a sub-carrier signal from a stereophonic multiplexed signal Mar. 23, 2010
7672395 Digital predistorter and predistortion method therefor Mar. 2, 2010
7646239 Feed-forward amplifier Jan. 12, 2010
7538632 Method and apparatus for controlling adaptive circuits May. 26, 2009
7522672 Digital branch calibrator for an RF transmitter Apr. 21, 2009
7436900 Intermodulation distortion identification and quantization circuit for a linear amplifier system Oct. 14, 2008
7436259 Amplification apparatus Oct. 14, 2008
7356102 Gain compensation over temperature and frequency variations in wireless transceivers Apr. 8, 2008
7224223 Feed-forward power amplifier May. 29, 2007
7218172 Apparatus and method for controlling adaptive circuits May. 15, 2007
7196576 Method and apparatus for control of predistortion linearizer based on power series Mar. 27, 2007
7187232 Feed forward amplifier employing positive feedback pilot generation with automatic level control Mar. 6, 2007
7187234 Decorrelated power amplifier linearizers Mar. 6, 2007
7173484 System and method of carrier reinjection in a feedforward amplifier Feb. 6, 2007
7170342 Linear power amplification method and linear power amplifier Jan. 30, 2007
7126421 Method for aligning feed forward loops Oct. 24, 2006
7126418 Delay mismatched feed forward amplifier system using penalties and floors for control Oct. 24, 2006
7123086 Feed forward amplifier employing positive feedback pilot generation Oct. 17, 2006
7116167 Predistortion linearizer and method thereof Oct. 3, 2006
7091781 Wideband feed forward linear power amplifier Aug. 15, 2006
7084703 Self-calibrated power amplifier linearizers Aug. 1, 2006
7053702 Feed forward amplifier May. 30, 2006
7042283 High-efficiency linear power amplifier May. 9, 2006
7035312 Pilot signal cycling technique for a control system that reduces distortion produced by electrical circuits Apr. 25, 2006
7015751 Decorrelated power amplifier linearizers Mar. 21, 2006
7009447 Outphasing modulator Mar. 7, 2006
7002407 Delay mismatched feed forward amplifier system using penalties and floors for control Feb. 21, 2006
6998916 Feed forward amplifier system using penalties and floors for optimal control Feb. 14, 2006
6958647 Dual loop feedforward power amplifier Oct. 25, 2005
6946906 System and method of pilot tone reuse in a feedforward amplifier Sep. 20, 2005
6943627 Calibration of an adaptive signal conditioning system Sep. 13, 2005
6940346 Feedforward amplifier, communication apparatus, feedforward amplification method, program and medium Sep. 6, 2005
6897723 Feed-forward amplifier loop control utilizing if signal processing May. 24, 2005
6888404 Multicarrier amplifying device May. 3, 2005
6838934 Feedforward amplifier with dual loop Jan. 4, 2005
6801083 Feedforward amplifier Oct. 5, 2004
6794933 Fast forward RF power amplifier with high efficiency main amplifier and highly linear error amplifier Sep. 21, 2004
6774716 Feedforward amplifier circuitry Aug. 10, 2004
6750706 Control method and circuit for feedforward distortion compensation amplifier Jun. 15, 2004
6734726 Balanced distortion reduction circuit May. 11, 2004
6734727 Feedforward amplifier, feedforward amplification method May. 11, 2004

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