H03F2203/21193 - CPC Classification Index

ClassID:

219750 ⎘

H03F2203/21193 - CPC Classification

Classification description:

Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by; Indexing scheme relating to power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only using a combination of several amplifiers the supply voltage of a power amplifier being continuously controlled, e.g. by an active potentiometer

Recent Application in this class:

20260135528

2026-05-14

POWER AMPLIFIER WITH VARIABLE POWER SUPPLY VOLTAGE

20190363677

2019-11-28

Optimizing power efficiency of a power amplifier circuit to reduce power consumption in a remote unit in a wireless distribution system (WDS)

20190181805

2019-06-13

Phase shift and attenuation circuits for use with multiple-path amplifiers

20180375477

2018-12-27

Phase shift and attenuation circuits for use with multiple-path amplifiers

20180337640

2018-11-22

Optimizing power efficiency of a power amplifier circuit to reduce power consumption in a remote unit in a wireless distribution system (WDS)

20180159480

2018-06-07

Phase shift and attenuation circuits for use with multiple-path amplifiers

20170223632

2017-08-03

Apparatus and methods for envelope tracking systems

20170111188

2017-04-20

PA cell, PA module, wireless communication unit, RF transmitter architecture and method therefor

20170077874

2017-03-16

Phase shift and attenuation circuits for use with multiple-path amplifiers

#10

20160365835

2016-12-15

Apparatus and methods for power amplifiers with phase compensation

#11

20160241200

2016-08-18

RF amplification device with power protection during high supply voltage conditions

#12

20160174153

2016-06-16

Apparatus and methods for envelope tracking in a mobile device

#13

20150280665

2015-10-01

Phase shift and attenuation circuits for use with multiple-path amplifiers

#14

20150244326

2015-08-27

Adaptive bias circuit and power amplifier

#15

20150180421

2015-06-25

Apparatus and methods for envelope trackers

#16

20150145600

2015-05-28

Circuits and methods for power amplification with extended high efficiency

#17

20150137893

2015-05-21

Parallel correction amplifier

#18

20150137886

2015-05-21

Power supply device, transmission device using same, and method for operating power supply device

#19

20150123735

2015-05-07

Reduced bandwith of signal in an envelope path for envelope tracking system

#20

20150105033

2015-04-16

Apparatus and methods for phase compensation in power amplifiers

#21

20150070098

2015-03-12

RF amplification device with power protection during high supply voltage conditions

#22

20150045095

2015-02-12

Power amplifier providing high efficiency

#23

20150015339

2015-01-15

Power amplifier architectures with input power protection circuits

#24

20140375388

2014-12-25

High speed power supply system

#25

20140361837

2014-12-11

Integrated circuit wireless communication unit and method for providing a power supply

#26

20140268930

2014-09-18

POWER SUPPLY METHOD AND APPARATUS

#27

20140254720

2014-09-11

PA cell, PA module, wireless communication unit, RF transmitter architecture and method therefor

#28

20140253248

2014-09-11

Phase shift and attenuation circuits for use with multiple-path amplifiers

#29

20140233763

2014-08-21

Amplifier for electrostatic transducers

#30

20140038522

2014-02-06

Forward link signaling within a wireless power system

#31

20130194023

2013-08-01

Adjustable power splitter and corresponding methods and apparatus

#32

20130038392

2013-02-14

Power supply method and apparatus

#33

20130002346

2013-01-03

Parallel correction amplifier

#34

20120236960

2012-09-20

Quadrature communications device with I antennas and Q antennas and related methods

#35

20110254625

2011-10-20

Circuit and method for reducing noise in class D amplifiers

#36

20110241782

2011-10-06

Power amplifier

#37

20110182087

2011-07-28

Method and apparatus for power converter for class D audio power amplifiers

#38

20110124305

2011-05-26

Forward link signaling within a wireless power system

#39

20100250993

2010-09-30

High speed power supply system

#40

20100194473

2010-08-05

Power amplifier with reconfigurable direct current coupling

#41

20090309658

2009-12-17

Method and apparatus for power converter for class D audio power amplifiers

#42

20090180530

2009-07-16

Apparatus and method for amplifying signal power in a communication system