ClassID:

219659

H03F2200/481 - CPC Classification

Classification description:

Indexing scheme relating to amplifiers A resistor being used as sensor

Recent Application in this class:
#1
20260100678
2026-04-09

CURRENT SENSE AMPLIFIER

#2
20260095135
2026-04-02

SENSING OF SIGNALS WITH COMMON MODE VARIATION

#3
20260005658
2026-01-01

SWITCHING AMPLIFIER CIRCUITRY

#4
20250364952
2025-11-27

DOHERTY POWER AMPLIFIER

#5
20250105810
2025-03-27

DIFFERENTIAL AMPLIFIER INCLUDING FEEDBACK LOOP CIRCUITS, ELECTRONIC DEVICE, AND OPERATING METHOD THEREOF

#6
20240056039
2024-02-15

SWITCHING AMPLIFIER CIRCUITRY

#7
20230291359
2023-09-14

DOHERTY POWER AMPLIFIER

#8
20230170854
2023-06-01

Modulator feedforward compensation

#9
20230137935
2023-05-04

Voltage-to-current architecture and error

#10
20220283202
2022-09-08

Sensing circuit, corresponding device and method

#11
20220247359
2022-08-04

Analog bias control of RF amplifiers

#12
20220158597
2022-05-19

Common-mode leakage error calibration for current sensing in a Class-D stage using a pilot tone

#13
20210351751
2021-11-11

Common-mode leakage error calibration for current sensing in a class-D stage using a pilot tone

#14
20210231710
2021-07-29

Voltage-to-current architecture and error correction schemes

#15
20210218372
2021-07-15

Method for amplifier load current cancellation in a current integrator and current integrator with amplifier load current cancellation

#16
20210165023
2021-06-03

Sensing circuit, corresponding device and method

#17
20210091724
2021-03-25

Analog bias control of RF amplifiers

#18
20200313635
2020-10-01

Method and device for providing a bias voltage in transceivers operating in time division multiplexing operation

#19
20200274499
2020-08-27

Power amplifier system

#20
20200144970
2020-05-07

FET operational temperature determination by gate structure resistance thermometry

#21
20200144969
2020-05-07

FET operational temperature determination by field plate resistance thermometry

#22
20200106406
2020-04-02

Increased output impedance switching amplifier and low-side recycle mode

#23
20200106393
2020-04-02

Amplifier power converter input current/power limit adjustment using amplifier load determinations

#24
20190372531
2019-12-05

Amplifier with local feedback loop

#25
20190288737
2019-09-19

RF metrology system for a substrate processing apparatus incorporating RF sensors with corresponding lock-in amplifiers

#26
20190214947
2019-07-11

Audio power source with improved efficiency

#27
20190154527
2019-05-23

Stress sensor

#28
20190128932
2019-05-02

High precision current sensing using sense amplifier with digital AZ offset compensation

#29
20190115874
2019-04-18

Voltage range extension for difference amplifier

#30
20190058448
2019-02-21

Method and device for providing a bias voltage in transceivers

#31
20180351547
2018-12-06

Ground switching for speaker current sense

#32
20180335454
2018-11-22

Current sensing in a USB power control analog subsystem

#33
20180309418
2018-10-25

Preamplifier for musical instruments

#34
20180109326
2018-04-19

Optical receiver, active optical cable, and control method for optical receiver

#35
20180076782
2018-03-15

Apparatus and methods for a difference amplifier

#36
20180069518
2018-03-08

Amplifier system and method for controlling amplifier

#37
20180041177
2018-02-08

Power amplifier, semiconductor integrated circuit, and method of controlling the power amplifier

#38
20170373655
2017-12-28

High frequency common mode rejection technique for large dynamic common mode signals

#39
20170288622
2017-10-05

Common mode gain trimming for amplifier

#40
20170160316
2017-06-08

Class D audio amplifier and method for reading a current supplied by the amplifier

#41
20170141748
2017-05-18

Amplifier system, controller of main amplifier and associated control method

#42
20170141741
2017-05-18

Apparatus and methods for protecting radio frequency amplifiers from overdrive

#43
20170019075
2017-01-19

RF amplifier

#44
20160294382
2016-10-06

Pass device with boost voltage regulation and current gain for VCSEL driving applications

#45
20160099730
2016-04-07

Amplifier

#46
20160065134
2016-03-03

Asymmetric H-bridge in a class D power amplifier

#47
20150061769
2015-03-05

Closed loop control system, and an amplifier in combination with such a closed loop control system

#48
20150010171
2015-01-08

Circuit for use with a loudspeaker for portable equipments

#49
20140111281
2014-04-24

Low dissipation amplifier

#50
20130271216
2013-10-17

High side current sense amplifier

#51
20130223649
2013-08-29

Load current sensing

#52
20130194037
2013-08-01

Power amplifier, radio-frequency power amplification device, and amplification control method

#53
20130147559
2013-06-13

Fully differential autozeroing amplifier

#54
20120169418
2012-07-05

Low dissipation amplifier

#55
20120094727
2012-04-19

POWER AMPLIFICATION CIRCUIT AND COMMUNICATION APPARATUS

#56
20110291765
2011-12-01

Overdrive protection circuit

#57
20110248783
2011-10-13

Circuit for amplifying a signal representing a variation in resistance of a variable resistance and corresponding sensor

#58
20100214024
2010-08-26

Low dissipation amplifier

#59
20100013523
2010-01-21

Current driver circuit

#60
20090289720
2009-11-26

High-efficiency envelope tracking systems and methods for radio frequency power amplifiers

#61
20080272750
2008-11-06

Device

#62
20080211483
2008-09-04

Electronic device with an amplifier output stage and an over-current detection means

#63
20080157895
2008-07-03

Multi-mode amplitude modulator control method

#64
20070063774
2007-03-22

Method and apparatus for controlling the output power of a power amplifier

#65
20060192619
2006-08-31

Procedure for operating a high frequency amplifier

#66
20060077001
2006-04-13

Temperature-compensated bias circuit for power amplifier

#67
20050030100
2005-02-10

Method and apparatus for controlling the output power of a power amplifier

#68
17411031
2023-07-04

Audio power source with improved efficiency

#69
16426011
2020-05-19

Signal process circuit capable of being externally coupled to multiple types of amplifier circuits

#70
15993063
2019-08-27

Amplifier with common mode loop and chop