ClassID:

219184

H03F1/345 - CPC Classification

Classification description:

Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements; Negative-feedback-circuit arrangements with or without positive feedback using hybrid or directional couplers

Recent Application in this class:
#1
20210211109
2021-07-08

Amplifier with adaptively-controlled local feedback loop

#2
20180287578
2018-10-04

Control system for a power amplifier

#3
20150054582
2015-02-26

Control system for a power amplifier

#4
20130137384
2013-05-30

Communication system with band, mode, impedance and linearization self-adjustment

#5
20120208477
2012-08-16

Systems and methods for a radio frequency transmitter with improved linearity and power out utilizing pre-distortion and a GaN (gallium nitride) power amplifier device

#6
20110190028
2011-08-04

Power amplifier linearization feedback methods and systems

#7
20100285833
2010-11-11

RF front-end circuit

#8
20100283538
2010-11-11

Frequency offset Cartesian feedback system

#9
20100156528
2010-06-24

Multiport amplifiers in communications satellites

#10
20100105342
2010-04-29

Electronic device with a distortion correction circuit for a power amplifier, and associated methods

#11
20100060353
2010-03-11

Power amplifier linearization using RF feedback

#12
20090237156
2009-09-24

Power amplifiers having improved startup linearization and related operating methods

#13
20080298501
2008-12-04

Method and apparatus for distortion correction of RF amplifiers

#14
20080170637
2008-07-17

Wireless communication unit, linearised transmitter circuit and method of linearising therein

#15
20070152902
2007-07-05

Directive, broadband, high gain, active antenna system

#16
20060293001
2006-12-28

Apparatus for mobile communication system

#17
20060240788
2006-10-26

Transmission output control circuit, and wireless device using the same

#18
20060055456
2006-03-16

Phase corrected miller compensation of chopper and nested chopper amplifiers

#19
20050058220
2005-03-17

Adaptive control apparatus