ClassID:

219668

H03F2200/507 - CPC Classification

Classification description:

Indexing scheme relating to amplifiers A switch being used for switching on or off a supply or supplying circuit in an IC-block amplifier circuit

Recent Application in this class:
#1
20250233559
2025-07-17

AMPLIFIER CIRCUIT, TRACKER MODULE, AMPLIFYING MODULE, AND COMMUNICATION DEVICE

#2
20230043939
2023-02-09

POWER SUPPLY SWITCH CIRCUIT AND OPERATING METHOD THEREOF

#3
20210297762
2021-09-23

Amplifier circuit and methods of operation thereof

#4
20210083635
2021-03-18

Supply modulating circuit including switching circuit and wireless communication device including the supply modulating circuit

#5
20210058036
2021-02-25

Control of envelope tracker PMIC

#6
20200403588
2020-12-24

Charge pump with current mode output power throttling

#7
20200252030
2020-08-06

Audio device for reducing pop noise and processing method thereof

#8
20200052582
2020-02-13

AMPLIFIER CIRCUIT AND METHODS OF OPERATION THEREOF

#9
20200044610
2020-02-06

Power supply signal generation

#10
20190379283
2019-12-12

Amplifier circuit and methods of operation thereof

#11
20190319720
2019-10-17

APPARATUS AND METHODS OF CALIBRATING A POWER AMPLIFIER SYSTEM TO COMPENSATE FOR ENVELOPE AMPLITUDE MISALIGNMENT

#12
20190260338
2019-08-22

POWER SUPPLY CONTROL DEVICE

#13
20190245489
2019-08-08

Control of envelope tracker PMIC

#14
20190207575
2019-07-04

POWER SUPPLY FOR CLASS G AMPLIFIER

#15
20190097583
2019-03-28

Amplifier configuration for load-line enhancement

#16
20190089311
2019-03-21

Power amplifier with supply switching

#17
20180375475
2018-12-27

Low distortion multiple power amplifier power supply

#18
20180367101
2018-12-20

Envelope-tracking power supply modulator

#19
20180323821
2018-11-08

Communications device with receiver chain of reduced size

#20
20180234063
2018-08-16

Charge pump with current mode output power throttling

#21
20180226927
2018-08-09

Multi-mode power amplifier module

#22
20180198430
2018-07-12

Power supply for class G amplifier

#23
20180061355
2018-03-01

Content dependent common voltage driver systems and methods

#24
20170288612
2017-10-05

Efficient wide bandwidth envelope tracking power supply

#25
20170250601
2017-08-31

Amplifier circuit and methods of operation thereof

#26
20170179888
2017-06-22

Low distortion multiple power amplifier power supply

#27
20170179887
2017-06-22

Generating power supply signals for a plurality of RF power amplifiers

#28
20170117870
2017-04-27

Matching network circuit, and associated apparatus with shared matching network circuit

#29
20170093505
2017-03-30

Methods of calibrating a power amplifier system to compensate for envelope amplitude misalignment

#30
20170077880
2017-03-16

Power supplies

#31
20160336850
2016-11-17

Amplifier circuit and methods of operation thereof

#32
20160261293
2016-09-08

Radio frequency system hybrid power amplifier systems and methods

#33
20160226449
2016-08-04

Envelope modulator

#34
20160218674
2016-07-28

Dual-mode power amplifier

#35
20160211816
2016-07-21

Amplifier circuit and methods of operation thereof

#36
20160181995
2016-06-23

Reconfigurable bias and supply drivers for radio frequency power amplifiers

#37
20160099742
2016-04-07

Apparatus and methods for calibration of envelope trackers

#38
20150236652
2015-08-20

Multi mode bias modulator operating in envelope tracking mode or average power tracking mode and envelope tracking power amplifier using the same

#39
20150200690
2015-07-16

Inter carrier-aggregation isolation in a receiver

#40
20150155834
2015-06-04

Apparatus and methods for calibrating envelope trackers

#41
20150145600
2015-05-28

Circuits and methods for power amplification with extended high efficiency

#42
20150061778
2015-03-05

Power supply device for high frequency power amplifying circuit and high frequency power amplifying apparatus

#43
20150030184
2015-01-29

Audio amplifier and power supply voltage switching method

#44
20150002232
2015-01-01

Power supply device for high frequency power amplification circuit and high frequency power amplification device

#45
20140312970
2014-10-23

Power supply circuit

#46
20140266465
2014-09-18

Apparatus and method for multilevel lossless outphasing power amplifier

#47
20140167856
2014-06-19

Power amplifier and operation method therefor

#48
20140159817
2014-06-12

Integrated start-up bias boost for dynamic error vector magnitude enhancement

#49
20140152388
2014-06-05

Amplifier circuit and methods of operation thereof

#50
20140064518
2014-03-06

Control of a switched mode power supply and linear power supply for an audio device

#51
20140043098
2014-02-13

Mobile device including a power amplifier with selectable voltage supply

#52
20130307627
2013-11-21

Integrated start-up bias boost for dynamic error vector magnitude enhancement

#53
20130307625
2013-11-21

Integrated start-up bias boost for dynamic error vector magnitude enhancement

#54
20130136213
2013-05-30

Reception signal processing device

#55
20130135043
2013-05-30

Multimode RF amplifier system

#56
20130078939
2013-03-28

Method for controlling fast tracking power supply, fast tracking power supply, and system

#57
20130021827
2013-01-24

System and method for envelope tracking power supply

#58
20120326774
2012-12-27

Switching circuit

#59
20120313610
2012-12-13

Power supply control circuit

#60
20120299649
2012-11-29

Multi-tier power supply for audio amplifiers

#61
20120218043
2012-08-30

Amplifier activation

#62
20120214423
2012-08-23

Adaptive average power tracking

#63
20120200360
2012-08-09

Power amplifier with dynamically added supply voltages

#64
20120200354
2012-08-09

Apparatus and methods for envelope tracking calibration

#65
20120187765
2012-07-26

POWER SUPPLY ARRANGEMENT FOR LINE TERMINATION UNITS

#66
20120176200
2012-07-12

Cross-differential amplifier

#67
20120142304
2012-06-07

Power Amplifiers for Wireless Systems

#68
20120025916
2012-02-02

Doherty amplifier

#69
20110316634
2011-12-29

High speed low power multiple standard and supply output driver

#70
20110279179
2011-11-17

Apparatus and method for controlling power amplifier

#71
20110241782
2011-10-06

Power amplifier

#72
20110235827
2011-09-29

Amplifier circuit and methods of operation thereof

#73
20110221417
2011-09-15

POWER SUPPLY APPARATUS AND POWER SUPPLY CONTROL METHOD

#74
20110191606
2011-08-04

Fast tracking power supply device, fast tracking power supply control method, and communication equipment

#75
20110170713
2011-07-14

Amplification apparatus

#76
20110156812
2011-06-30

Multi-band, multi-mode RF transmit amplifier system with separate signal paths for linear and saturated operation

#77
20110115563
2011-05-19

Amplifier circuit and methods of operation thereof

#78
20110103619
2011-05-05

Amplifier circuit and methods of operation thereof

#79
20110095829
2011-04-28

Headphone amplifier circuit

#80
20110068866
2011-03-24

Amplifying device

#81
20110018351
2011-01-27

High bandwidth power supply system with high efficiency and low distortion

#82
20100321116
2010-12-23

Method and apparatus for controlling power supply of audio amplifier

#83
20100321115
2010-12-23

Class-G line driver control signal

#84
20100315097
2010-12-16

AMPLIFIER CIRCUIT

#85
20100308919
2010-12-09

Methods and devices for leakage current reduction

#86
20100273536
2010-10-28

Method and apparatus for powering a wireless peripheral

#87
20100194479
2010-08-05

Amplifier circuit and methods of operation thereof

#88
20100117733
2010-05-13

Cross-differential amplifier

#89
20100097148
2010-04-22

Headphone amplifier circuit

#90
20100004936
2010-01-07

AUDIO OUTPUT APPARATUS CAPABLE OF SUPPRESSING POP NOISE

#91
20090278609
2009-11-12

Supply control for multiple power modes of a power amplifier

#92
20090224860
2009-09-10

System and method of using residual voltage from a prior operation to establish a bias voltage for a subsequent operation

#93
20090219086
2009-09-03

Amplifier, amplifying method, and filter

#94
20090212859
2009-08-27

AMPLIFIER CIRCUIT AND METHODS OF OPERATION THEREOF

#95
20090195314
2009-08-06

Device and method for amplifying pulsed RF signals

#96
20090154733
2009-06-18

AMPLIFIER CIRCUIT AND METHODS OF OPERATION THEREOF

#97
20090088096
2009-04-02

Apparatus and method for power amplification in wireless communication system

#98
20080211584
2008-09-04

Cross-differential amplifier

#99
20080211579
2008-09-04

Method and apparatus for optimizing power dissipation in a low noise amplifier

#100
20080190203
2008-08-14

Signal Amplifying Circuit and Acceleration Sensor Having the Same

#101
20080174179
2008-07-24

POWER SUPPLY DEVICE AND METHOD OF SUPPLYING POWER SUPPLY VOLTAGE TO LOAD DEVICE

#102
20080159567
2008-07-03

Audio amplifier circuit and electronic apparatus including the same

#103
20080157895
2008-07-03

Multi-mode amplitude modulator control method

#104
20080116979
2008-05-22

Amplifier circuit and methods of operation thereof

#105
20080056513
2008-03-06

Amplifier apparatus and method

#106
20080055000
2008-03-06

Amplification apparatus

#107
20080054993
2008-03-06

Amplifier apparatus and method

#108
20080044041
2008-02-21

Energy-efficient consumer device audio power output stage

#109
20080036532
2008-02-14

Transmitter power amplifier working at different power supplies

#110
20080018386
2008-01-24

Constant voltage generating circuit

#111
20070270110
2007-11-22

Analog front end for a wireless device

#112
20070223360
2007-09-27

Signal output circuit, communication apparatus and signal output control method

#113
20070182490
2007-08-09

Power amplifier with close-loop adaptive voltage supply

#114
20070182483
2007-08-09

POWER AMPLIFIER BIAS PROTECTION FOR DEPLETION MODE TRANSISTOR

#115
20070177322
2007-08-02

System and method for current overload response with class D topology

#116
20070154034
2007-07-05

Circuit for suppressing audio noise

#117
20070146067
2007-06-28

Switching amplifier

#118
20070116303
2007-05-24

Audio output driver and methods for use therewith

#119
20070096828
2007-05-03

Cross-differential amplifier

#120
20070096819
2007-05-03

CMOS amplifier

#121
20060220590
2006-10-05

Operational amplifier, and amplitude modulator and transmitter using the same

#122
20060205378
2006-09-14

OFDM amplifier and method therefor

#123
20060068697
2006-03-30

Transmitter

#124
20050275454
2005-12-15

Cross-differential amplifier

#125
15201974
2017-09-05

Power amplifying circuit

#126
13652939
2015-08-18

Energy-efficient consumer device audio power output stage