ClassID:

219642

H03F2200/435 - CPC Classification

Classification description:

Indexing scheme relating to amplifiers A peak detection being used in a signal measuring circuit in a controlling circuit of an amplifier

Recent Application in this class:
#1
20260155789
2026-06-04

AMPLIFIER EQUALIZER MULTI-TONE PEAK ADAPTATION

#2
20260135522
2026-05-14

PA COARSE COMPLEX VSWR DETECTION (QUADRANT) FOR ANALOG-ASSISTED DPD AND PA LOAD MODULATION OPTIMIZATION

#3
20260005652
2026-01-01

TRACKER CIRCUIT, TRACKER MODULE, AND VOLTAGE SUPPLY METHOD

#4
20250379547
2025-12-11

RUGGED PEAK VOLTAGE LIMITING CIRCUITS

#5
20250362380
2025-11-27

MILLIMETER WAVE AUTOMOTIVE RADAR SYSTEMS

#6
20250300611
2025-09-25

PEAK CURRENT MEASUREMENT OF CLASS-D AMPLIFIER DRIVER UTILIZING CHARGE ACCUMULATION

#7
20250253811
2025-08-07

VOLTAGE LIMITING CIRCUIT AND METHOD FOR A POWER AMPLIFIER

#8
20250211182
2025-06-26

AMPLIFIER PEAK DETECTION

#9
20250175128
2025-05-29

POWER AMPLIFIER

#10
20250150036
2025-05-08

BIAS CIRCUIT FOR POWER AMPLIFIER

#11
20240250645
2024-07-25

CIRCUITS, DEVICES AND METHODS RELATED TO PROTECTION OF RADIO-FREQUENCY AMPLIFIERS

#12
20230421111
2023-12-28

PA COARSE COMPLEX VSWR DETECTION (QUADRANT) FOR ANALOG-ASSISTED DPD AND PA LOAD MODULATION OPTIMIZATION

#13
20230128266
2023-04-27

RF peak detector circuit

#14
20230085587
2023-03-16

Dynamic envelope-tracking supply rail voltage setting

#15
20220416737
2022-12-29

Amplifier peak detection

#16
20220329214
2022-10-13

Protection circuit and method

#17
20220149798
2022-05-12

Transmission circuit and transmission signal strength adjusting method thereof

#18
20220123692
2022-04-21

In-situ low-cost small size sensing and measurement for wireless power transfer systems

#19
20220116024
2022-04-14

Method and device for determining the phase shift between two signals

#20
20220094318
2022-03-24

Fully differential PWM/PFM power converter control

#21
20210376801
2021-12-02

Amplifier having input power protection

#22
20210211108
2021-07-08

Envelope tracking power management apparatus incorporating multiple power amplifiers

#23
20210126603
2021-04-29

Transimpedance amplifier circuit

#24
20210067111
2021-03-04

Amplifier system with reduced voltage swing

#25
20200321913
2020-10-08

Swing tracking and control

#26
20200153404
2020-05-14

Automatic gain control for passive optical network

#27
20200127614
2020-04-23

PEAK VOLTAGE LIMITING CIRCUITS AND METHODS FOR POWER AMPLIFIERS

#28
20200036351
2020-01-30

Signal level detection and overrange signal limiter and clamp for electronic circuits

#29
20190235050
2019-08-01

MILLIMETER WAVE AUTOMOTIVE RADAR SYSTEMS

#30
20190214948
2019-07-11

In-situ low-cost small size sensing and measurement for wireless power transfer systems

#31
20190140612
2019-05-09

Microelectromechanical system resonator devices and oscillator control circuits

#32
20190089311
2019-03-21

Power amplifier with supply switching

#33
20190068151
2019-02-28

Amplification circuit with read/write circuit

#34
20180254756
2018-09-06

Optical receiver

#35
20180241347
2018-08-23

Digital dynamic bias circuit

#36
20180184200
2018-06-28

Electronic circuit for a microphone and microphone

#37
20180076771
2018-03-15

Power amplifier with supply switching

#38
20180069316
2018-03-08

Combining power amplifiers at millimeter wave frequencies

#39
20170264254
2017-09-14

AMPLIFIER CONTROL APPARATUS

#40
20170264246
2017-09-14

Envelope tracking power amplifying apparatus and method

#41
20170207758
2017-07-20

Power amplifier system and associated control circuit and control method

#42
20170194912
2017-07-06

Audio system having an improved efficiency and extended operation time

#43
20170141748
2017-05-18

Amplifier system, controller of main amplifier and associated control method

#44
20170085225
2017-03-23

Audio system having an improved efficiency and extended operation time

#45
20160197588
2016-07-07

Audio delivery system having an improved efficiency and extended operation time between recharges or battery replacements

#46
20160142028
2016-05-19

High speed signal level detector and burst-mode trans impedance amplifier using the same

#47
20160142026
2016-05-19

Regulated cascode (RGC)-type burst mode optic pre-amplifier having extended linear input range

#48
20160126907
2016-05-05

Amplifier control apparatus

#49
20160118970
2016-04-28

Peak detector using charge pump and burst-mode transimpedance amplifier

#50
20160099688
2016-04-07

Peak voltage limiting circuits and methods for power amplifiers

#51
20160079932
2016-03-17

Apparatus and method for digital pre-distortion in wireless communication system

#52
20160036386
2016-02-04

Dynamic bias current adjustment for power amplifiers

#53
20160013757
2016-01-14

High efficiency and high linearity adaptive power amplifier for signals with high papr

#54
20150236658
2015-08-20

Power detector with overdrive detection

#55
20150145599
2015-05-28

Radio frequency signal amplifying system

#56
20150085748
2015-03-26

System and method for controlling peak to average power ratio

#57
20140361830
2014-12-11

Envelope tracker with variable boosted supply voltage

#58
20140285261
2014-09-25

Controlled power boost for envelope tracker

#59
20140270242
2014-09-18

Feedback mechanism for boost-on-demand amplifiers

#60
20140203172
2014-07-24

Laser detection system and method for a rotary laser level

#61
20140202011
2014-07-24

Rotary laser level with automated level calibration

#62
20140182147
2014-07-03

Rotary laser level with theft detection

#63
20140179250
2014-06-26

Time alignment for an amplification stage

#64
20140146919
2014-05-29

High efficiency adaptive RF transmitter

#65
20140111276
2014-04-24

Boost converter control for envelope tracking

#66
20140077875
2014-03-20

High efficiency and high linearity adaptive power amplifier for signals with high PAPR

#67
20140065995
2014-03-06

Receiver of radio frequency signals

#68
20130342274
2013-12-26

DC-coupled peak detector

#69
20130229235
2013-09-05

High-frequency amplifier, and high-frequency module and wireless transceiver using same

#70
20130141167
2013-06-06

Power amplifier

#71
20130049735
2013-02-28

Radio frequency power amplifier protection system

#72
20130043732
2013-02-21

POWER GENERATING SYSTEM

#73
20120294398
2012-11-22

Adaptive RF saturation detection in a wireless device implementing multiple wireless protocols

#74
20120275544
2012-11-01

Envelope extraction with reduced bandwidth for power modulation

#75
20120223777
2012-09-06

RF power amplifier circuit with mismatch tolerance

#76
20120171979
2012-07-05

Radio frequency receiver and radio receiver

#77
20120171975
2012-07-05

Method for controlling peak-to-average power ratio of single carrier FDMA system

#78
20120157020
2012-06-21

Amplifier circuit, control method for supplying power to amplifier circuit, and transmission device

#79
20120075016
2012-03-29

Calibrate output matching for correct output power

#80
20120046004
2012-02-23

High performance transmitter preamplification chain with calibration feedback

#81
20110298539
2011-12-08

RF power amplifier circuit with mismatch tolerance

#82
20110234315
2011-09-29

Power amplifier linearization using cancellation-based feed forward methods and systems

#83
20110221417
2011-09-15

POWER SUPPLY APPARATUS AND POWER SUPPLY CONTROL METHOD

#84
20110170713
2011-07-14

Amplification apparatus

#85
20110156813
2011-06-30

Power amplifier

#86
20110043956
2011-02-24

Protection circuit for power amplifier

#87
20110018638
2011-01-27

Split-biased current scalable buffer

#88
20100271123
2010-10-28

ADAPTIVE DIGITAL PREDISTORTION OF COMPLEX MODULATED WAVEFORM USING LOCALIZED PEAK FEEDBACK FROM THE OUTPUT OF A POWER AMPLIFIER

#89
20100237943
2010-09-23

Auto gain controllers, and communication terminals having the same

#90
20100227577
2010-09-09

APPARATUS AND METHOD FOR IMPROVING LINEARITY OF TRANSMITTER

#91
20100201437
2010-08-12

Tunable RF filter

#92
20100158166
2010-06-24

Noise injection circuit and method for signal processing

#93
20100033246
2010-02-11

Adaptive digital predistortion of complex modulated waveform using peak and RMS voltage feedback from the output of a power amplifier

#94
20090163784
2009-06-25

Ultra-low-power pulse oximeter implemented with an energy-efficient photoreceptor

#95
20090153248
2009-06-18

Amplifier with dynamic bias

#96
20090134913
2009-05-28

Signal comparison circuit

#97
20090066394
2009-03-12

Peaking control circuit

#98
20090021303
2009-01-22

Distortion-driven power amplifier power supply controller

#99
20080239597
2008-10-02

Peak Voltage Protection Circuit and Method

#100
20080122539
2008-05-29

Signal amplification device

#101
20080112496
2008-05-15

Peak-to-average-power reduction of OFDM signals

#102
20080042735
2008-02-21

Signal-level detecting apparatus, optical receiver, and signal-level detecting method

#103
20080031383
2008-02-07

Replica linearized power amplifier

#104
20080025375
2008-01-31

Bandwidth-constrained signal conditioning

#105
20080009255
2008-01-10

Peak detector and fixed gain amplifier circuit for automatic gain control and variable gain amplifier circuit

#106
20080007341
2008-01-10

Automatic bias control circuit for reduced current consumption in a linear power amplifier

#107
20070296504
2007-12-27

Integrated implementation of a voltage boost follower and method therefor

#108
20070281635
2007-12-06

RF transmitter with variably biased RF power amplifier and method therefor

#109
20070188236
2007-08-16

Automatic gain control with three states of operation

#110
20070070534
2007-03-29

Variable threshold bipolar signal peak detector

#111
20070057729
2007-03-15

Power amplifier and wireless communication device

#112
20070037532
2007-02-15

Radio frequency excitation arrangement including a limiting circuit

#113
20070030077
2007-02-08

Use of a thick oxide device as a cascode for a thin oxide transconductance device in MOSFET technology and its application to a power amplifier design

#114
20070001766
2007-01-04

Automatic bias control circuit for linear power amplifiers

#115
20060238255
2006-10-26

Automatic gain control with three states of operation

#116
20060232332
2006-10-19

Adaptive predistortion linearized amplifier system employing selective sampling

#117
20060223451
2006-10-05

Transceiver with receive path overload protection and method

#118
20060220748
2006-10-05

Use of a thick oxide device as a cascode for a thin oxide transconductance device in MOSFET technology and its application to a power amplifier design

#119
20060148435
2006-07-06

Method and apparatus for multichannel signal limiting

#120
20060057980
2006-03-16

Transmitter circuit with modulated power amplifier bias control based on RF carrier envelope tracking

#121
20060040624
2006-02-23

Peak power limitation in an amplifier pooling scenario

#122
20060017538
2006-01-26

Distributed active transformer power control techiques

#123
20060006945
2006-01-12

Parallel amplifier configuration with power combining and impedance transformation

#124
20050285682
2005-12-29

Amplifying circuit with variable supply voltage

#125
20050264359
2005-12-01

Programmable automatic signal amplitude control circuit

#126
20050088242
2005-04-28

Use of a thick oxide device as a cascode for a thin oxide transcoductance device in MOSFET technology and its application to a power amplifier design

#127
16157042
2020-02-11

Measuring media attention over time based on long term heterogeneous archive data

#128
15854135
2019-03-05

Peak detector and operational amplifier circuit therein

#129
15264421
2017-09-19

Envelope dependent output stage scalability

#130
14292241
2016-10-04

Doherty power amplifier with integrated pre-distortion