ClassID:

219621

H03F2200/378 - CPC Classification

Classification description:

Indexing scheme relating to amplifiers A variable capacitor being added in the output circuit, e.g. collector, drain, of an amplifier stage

Recent Application in this class:
#1
20260039257
2026-02-05

RF Switch with Split Tunable Matching Network

#2
20250350252
2025-11-13

SYSTEMS AND METHODS USING TWO OR MORE PROCESS TECHNOLOGIES FOR AMPLIFICATION

#3
20250183858
2025-06-05

AMPLIFIER WITH BYPASS MODE AND NOTCH FILTER

#4
20240113666
2024-04-04

AMPLIFIER MODULE

#5
20230308053
2023-09-28

Dynamically biased power amplification

#6
20230246602
2023-08-03

RF Switch with Split Tunable Matching Network

#7
20220407475
2022-12-22

Switched capacitor amplifying apparatus and method having gain adjustment mechanism

#8
20220345093
2022-10-27

ELECTRONIC DEVICE COMPRISING AMPLIFIER CIRCUIT FOR PROCESSING WIDEBAND RF SIGNAL

#9
20220200534
2022-06-23

Dynamically biased power amplification

#10
20220071544
2022-03-10

ELECTROENCEPHALOGRAM (EEG) SIGNAL AMPLIFICATION APPARATUS FOR BOOSTING IMPEDANCE

#11
20220052658
2022-02-17

Power amplifier circuit

#12
20210408983
2021-12-30

Digital power amplifier with RF sampling rate and wide tuning range

#13
20210391829
2021-12-16

Symmetric Doherty amplifier with in-package combining node

#14
20210336588
2021-10-28

RF switch with split tunable matching network

#15
20210067107
2021-03-04

Digital power amplifier with RF sampling rate and wide tuning range

#16
20210048474
2021-02-18

Mismatch detection using replica circuit

#17
20200395902
2020-12-17

Power amplifier circuit

#18
20200235709
2020-07-23

RF switch with split tunable matching network

#19
20200228071
2020-07-16

Band-Reconfigurable and Load-Adaptive Power Amplifier

#20
20200195199
2020-06-18

Configurable switched power amplifier for efficient high/low output power

#21
20200169232
2020-05-28

Power amplifying circuit

#22
20200021260
2020-01-16

Amplification circuit, and receiving circuit, semiconductor apparatus and semiconductor system using the amplification circuit

#23
20190372533
2019-12-05

Wideband low noise amplifier (LNA) with a reconfigurable bandwidth for millimeter-wave 5G communication

#24
20190296777
2019-09-26

Multi-mode multi-band self-realigning power amplifier

#25
20190267951
2019-08-29

Amplifier with second-harmonic trap

#26
20190222183
2019-07-18

DIFFERENTIAL HARD-SWITCHING RADIO FREQUENCY (RF) POWER AMPLIFIER

#27
20190215023
2019-07-11

Load modulation in signal transmission

#28
20190207560
2019-07-04

Dynamically biased power amplification

#29
20190199297
2019-06-27

Band-reconfigurable and load-adaptive power amplifier

#30
20190181812
2019-06-13

AUTOMATIC IMPEDANCE MATCHING USING TRUE POWER INFORMATION

#31
20190140602
2019-05-09

RF switch with split tunable matching network

#32
20190113564
2019-04-18

Mismatch detection using replica circuit

#33
20190068135
2019-02-28

Tunable power amplifier with wide frequency range

#34
20180241352
2018-08-23

Apparatus and method for improving efficiency of power amplifier

#35
20180175798
2018-06-21

AREA EFFICIENT ARCHITECTURE TO COMBINE OUTPUTS OF PARALLEL TRANSMIT SIGNAL PATHS

#36
20180164366
2018-06-14

Mismatch detection using replica circuit

#37
20180109230
2018-04-19

Supervisory control of radio frequency (RF) impedance tuning operation

#38
20180102745
2018-04-12

Low-noise amplifier and electronic device

#39
20180097480
2018-04-05

Radio frequency apparatus and method with dual variable impedance components

#40
20180076780
2018-03-15

Fast settling capacitive gain amplifier circuit

#41
20180076779
2018-03-15

Fast settling capacitive gain amplifier circuit

#42
20180019715
2018-01-18

Automatic impedance matching using true power information

#43
20170237448
2017-08-17

Method for performing communication and electronic device supporting same

#44
20170222604
2017-08-03

Power amplifier circuit

#45
20170207805
2017-07-20

High speed receivers circuits and methods

#46
20170201218
2017-07-13

Carrier aggregation low-noise amplifier with tunable integrated power splitter

#47
20170146591
2017-05-25

Mismatch detection using replica circuit

#48
20170005628
2017-01-05

Tunable power amplifier with wide frequency range

#49
20160308566
2016-10-20

High speed receivers circuits and methods

#50
20160308494
2016-10-20

Power amplifier device with controlled envelope tracking modulator and adapted static voltage

#51
20160248462
2016-08-25

Frequency tuning of narrowband low noise amplifiers

#52
20160241211
2016-08-18

Amplifier with common-mode filter

#53
20160173032
2016-06-16

Apparatus and methods for a capacitive digital-to-analog converter based power amplifier

#54
20160116525
2016-04-28

Mismatch detection using replica circuit

#55
20160105153
2016-04-14

Band-reconfigurable and load-adaptive power amplifier

#56
20160094190
2016-03-31

Automatic impedance matching using true power information

#57
20160080005
2016-03-17

Multi-mode multi-band self-realigning power amplifier

#58
20160072456
2016-03-10

Dual-band low noise amplifier

#59
20160043698
2016-02-11

Tunable power amplifier with wide frequency range

#60
20150341059
2015-11-26

Apparatus and method for load modulating an amplifier

#61
20150341002
2015-11-26

Wireless communication device, method and power amplifier of the same

#62
20150340991
2015-11-26

Multi-band power amplifier

#63
20150171800
2015-06-18

Tunable loadline

#64
20150091657
2015-04-02

Methods and devices for thermal control in power amplifier circuits

#65
20150091656
2015-04-02

Methods and devices for impedance matching in power amplifier circuits

#66
20140176242
2014-06-26

Driver amplifier with asymmetrical T-coil matching network

#67
20140167864
2014-06-19

Tunable wide band driver amplifier

#68
20140125410
2014-05-08

Digital polar and ZVS contour based hybrid power amplifier

#69
20140065991
2014-03-06

Matching network for transmission circuitry

#70
20140062591
2014-03-06

Power amplifier with variable output impedance

#71
20140062589
2014-03-06

Quasi-broadband doherty amplifier with associated capacitor circuit

#72
20140055212
2014-02-27

High power tunable capacitor

#73
20130285741
2013-10-31

Power amplifier with fast loadline modulation

#74
20130190036
2013-07-25

Multi-mode bypass driver amplifier with tunable load matching

#75
20130109434
2013-05-02

Multi-mode multi-band self-realigning power amplifier

#76
20130099797
2013-04-25

Variable impedance device

#77
20120293250
2012-11-22

Amplifier

#78
20120286876
2012-11-15

Multi-band power amplifier

#79
20120236960
2012-09-20

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

#80
20120169566
2012-07-05

Impedance matching method for a multiband antenna, and transmission or receiver channel having automatic matching

#81
20120154043
2012-06-21

High-frequency power amplifier device

#82
20120146722
2012-06-14

Power amplifier having a nonlinear output capacitance equalization

#83
20120139644
2012-06-07

Dual use transistor

#84
20120139628
2012-06-07

Method and arrangement in a mobile communications system

#85
20120126886
2012-05-24

Method and arrangement in a mobile communication system

#86
20120105147
2012-05-03

Matching network for transmission circuitry

#87
20120075019
2012-03-29

PA load-line tuning with capacitors around a balun

#88
20120075016
2012-03-29

Calibrate output matching for correct output power

#89
20120032744
2012-02-09

Power amplifier

#90
20120001693
2012-01-05

Power amplifier amplitude modulator system and method

#91
20110298535
2011-12-08

System and method for compensating for changes in an output impedance of a power amplifier

#92
20110279178
2011-11-17

Multi-band high-efficiency Doherty amplifier

#93
20110241781
2011-10-06

Variable class characteristic amplifier

#94
20110163824
2011-07-07

Electronic circuit and electronic device

#95
20110098013
2011-04-28

High-frequency amplifier and radio communication apparatus

#96
20100308933
2010-12-09

Tunable matching circuits for power amplifiers

#97
20100301946
2010-12-02

Switchable multiband LNA design

#98
20100261444
2010-10-14

Load modulation arrangement

#99
20100259331
2010-10-14

High-linearity low noise amplifier

#100
20100246659
2010-09-30

Global instruction broadcasting for pulse-position modulated data transmission

#101
20100244949
2010-09-30

Composite amplifier, a radio terminal and a method for improving the efficiency of the composite amplifier

#102
20100231430
2010-09-16

Amplifier and analog/digital converter

#103
20100201437
2010-08-12

Tunable RF filter

#104
20100099368
2010-04-22

Monolithic FM-band transmit power amplifier for mobile cellular devices and method of operation thereof

#105
20100033243
2010-02-11

Amplifying apparatus

#106
20100029226
2010-02-04

Determining on chip loading impedance of RF circuit

#107
20090201088
2009-08-13

Measuring load impedance of an amplifier driving a variable load

#108
20090195316
2009-08-06

Re-configurable low noise amplifier utilizing feedback capacitors

#109
20090189697
2009-07-30

Auto-tuning amplifier

#110
20090096533
2009-04-16

Adaptively tuned RF power amplifier

#111
20090066440
2009-03-12

Method for automatic impedance matching for a radiofrequency circuit and transmission or reception system with automatic matching

#112
20090039964
2009-02-12

Low-noise amplifier circuit and receiving system

#113
20090015324
2009-01-15

Power amplifier amplitude modulator system and method

#114
20080303597
2008-12-11

Semiconductor circuit

#115
20080252546
2008-10-16

Ultra wideband impulse radar

#116
20080157876
2008-07-03

Low strain variable frequency amplifier

#117
20080029753
2008-02-07

Configurable circuits using phase change switches

#118
20070222513
2007-09-27

Apparatus and method for processing of amplifier linearization signals

#119
14868276
2017-05-30

Variable gain and slope active topology