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Class Information
Number: 330/291
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including signal feedback means
Description: Subject matter wherein a portion of the electrical signal output energy is applied to the input of the amplifier.










Sub-classes under this class:

Class Number Class Name Patents
330/292 Having compensation for interelectrode impedance 248
330/294 Having frequency-responsive means or phase-shift means in feedback path 321
330/293 Having negative feedback 202


Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8660277 Amplifier circuit and methods of operation thereof Feb. 25, 2014
8644773 Multiband low noise amplifier (LNA) with parallel resonant feedback Feb. 4, 2014
8633769 Dual loop adaptation digital predistortion architecture for power amplifiers Jan. 21, 2014
8570106 Positive feedback common gate low noise amplifier Oct. 29, 2013
8565669 Methods and apparatus for power reduction in a transceiver Oct. 22, 2013
8558621 Driver amplifier circuit and communication system Oct. 15, 2013
8542062 Adaptive digital pre-distortion method and device to enhance the power utility of power amplifiers in wireless digital communication applications Sep. 24, 2013
8466755 Polar modulation apparatus and communication device Jun. 18, 2013
8461926 Differential amplifier circuit Jun. 11, 2013
8421538 Feedback amplifier Apr. 16, 2013
8405374 Power amplification device Mar. 26, 2013
8400223 Amplifier arrangement Mar. 19, 2013
8390742 Semiconductor integrated circuit and video signal output circuit Mar. 5, 2013
8331882 VSWR normalizing envelope modulator Dec. 11, 2012
8330199 Semiconductor device having resistors with a biased substrate voltage Dec. 11, 2012
8310311 Semiconductor integrated circuit device and communication system Nov. 13, 2012
8258873 Constructive feedback traveling wave device and method Sep. 4, 2012
8254598 Programmable integrated microphone interface circuit Aug. 28, 2012
8228222 D-class digital amplifier configured for shaping non-idealities of an output signal Jul. 24, 2012
8208876 Amplifier compression controller circuit Jun. 26, 2012
8193720 Electrodeless lamp protecting device Jun. 5, 2012
8154346 Short circuits and power limit protection circuits Apr. 10, 2012
8149051 Solid-state image sensor Apr. 3, 2012
8115553 High linearity, low noise, wide bandwidth amplifier/buffer Feb. 14, 2012
8107901 Feedback loop with adjustable bandwidth Jan. 31, 2012
8102214 Controlled-gain wideband feedback low noise amplifier Jan. 24, 2012
8089316 Wideband active circuit with feedback structure Jan. 3, 2012
RE42846 Close-loop class-D audio amplifier and control method thereof Oct. 18, 2011
8004360 Close-loop Class-D audio amplifier and control method thereof Aug. 23, 2011
7999780 Drive circuit containing amplifier circuit Aug. 16, 2011
7956691 System and method for over-voltage protection of a power amplifier Jun. 7, 2011
7940120 Power amplifier linearization using RF feedback May. 10, 2011
7940122 Amplifier circuit and communication device May. 10, 2011
7917106 RF power amplifier controller circuit including calibrated phase control loop Mar. 29, 2011
7915958 Amplifier Mar. 29, 2011
7899420 Wireless transmission device in which transmission output is controlled in feedback control Mar. 1, 2011
7786805 Power amplifier module and a time division multiple access radio Aug. 31, 2010
7728666 Close-loop class-D audio amplifier and control method thereof Jun. 1, 2010
7724085 Impedance matched variable gain low noise amplifier using shunt feed-back May. 25, 2010
7692486 Configurable feedback for an amplifier Apr. 6, 2010
7688136 Shared linearity maintenance in power amplifiers Mar. 30, 2010
7683707 Self-oscillating modulator Mar. 23, 2010
7685452 Method for high voltage power feed on differential cable pairs from a network attached power sourcing device Mar. 23, 2010
7659781 Active resistor used in a feedback amplifier particularly useful for proximity communication Feb. 9, 2010
7633386 Amplifier for multi-use of single environmental sensor Dec. 15, 2009
7633344 Low noise amplifier and differential amplifier Dec. 15, 2009
7605660 Linear multi-stage transimpedance amplifier Oct. 20, 2009
7570714 Data transfer apparatus for low voltage differential signaling Aug. 4, 2009
7567127 Automatic-gain control circuit Jul. 28, 2009
7557653 Shared linearity maintenance in power amplifiers Jul. 7, 2009

1 2 3 4










 
 
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