ClassID:

219539

H03F2200/153 - CPC Classification

Classification description:

Indexing scheme relating to amplifiers Feedback used to stabilise the amplifier

Recent Application in this class:
#1
20250373208
2025-12-04

Current limiting apparatus for driving a loudspeaker

#2
20250150037
2025-05-08

DUAL-OUTPUT AMPLIFIER CIRCUIT

#3
20240243701
2024-07-18

AMPLIFIER CIRCUIT FOR BUFFERING HIGH SLEW RATE SIGNAL

#4
20230421105
2023-12-28

ENVELOPE TRACKING RADIO FREQUENCY FRONT-END CIRCUIT

#5
20230327609
2023-10-12

AMPLIFIER CIRCUIT WITH PROTECTION CIRCUIT

#6
20230017817
2023-01-19

Acoustic Apparatus

#7
20220271722
2022-08-25

Amplifier circuitry

#8
20220271721
2022-08-25

Amplifier circuitry

#9
20220224312
2022-07-14

Method for tunably multiplying an impedance

#10
20220209729
2022-06-30

Operational transconductance amplifier circuit including active inductor

#11
20220200554
2022-06-23

Buffer circuit, receiver, base station and mobile device

#12
20220158625
2022-05-19

Tunable grounded positive and negative impedance multiplier

#13
20220149791
2022-05-12

Amplifier circuit

#14
20210320635
2021-10-14

Apparatus for pole frequency tracking in amplifiers and associated methods

#15
20210265960
2021-08-26

METHOD FOR GENERATING FULLY DIGITAL HIGH-RESOLUTION FEEDBACK PWM SIGNAL

#16
20210249998
2021-08-12

Dynamic stability control in amplifier driving high Q load

#17
20210104987
2021-04-08

Amplifier circuitry

#18
20200350868
2020-11-05

Amplifier circuit with overshoot suppression

#19
20200186098
2020-06-11

Transimpedance amplifiers with feedforward current

#20
20200059213
2020-02-20

Amplifier circuit and transimpedance amplifier circuit

#21
20200036348
2020-01-30

Class-D dynamic closed loop feedback amplifier

#22
20190388138
2019-12-26

Electrosurgical apparatus with real-time RF tissue energy control

#23
20190280655
2019-09-12

AMPLIFIER CIRCUIT AND BUTTER AMPLIFIER

#24
20190199289
2019-06-27

Amplifiers and related integrated circuits

#25
20190149108
2019-05-16

Power-on-reset and phase comparator for chopper amplifiers

#26
20190149100
2019-05-16

Amplifier circuit with overshoot suppression

#27
20190074800
2019-03-07

Amplifier and reset method thereof

#28
20190052228
2019-02-14

Rail-to-rail source follower

#29
20180332377
2018-11-15

System and method for signal read-out using source follower feedback

#30
20180316323
2018-11-01

Amplifier

#31
20180309416
2018-10-25

Multi-stage amplifier circuit with zero and pole inserted by compensation circuits

#32
20180269839
2018-09-20

Amplifier with nonlinearity compensation

#33
20180254751
2018-09-06

Distributed amplifier

#34
20180175814
2018-06-21

CIRCUITS AND METHODS FOR BIASING POWER AMPLIFIERS

#35
20180167242
2018-06-14

Communication cable module and transmission loss compensation circuit

#36
20180145633
2018-05-24

Distributed pole-zero compensation for an amplifier

#37
20180132024
2018-05-10

System and method for signal read-out using source follower feedback

#38
20180069510
2018-03-08

Frequency selective low noise amplifier circuit

#39
20180048266
2018-02-15

Amplifier circuit with overshoot suppression

#40
20170373650
2017-12-28

Methods and devices relating to high gain amplifiers

#41
20170331440
2017-11-16

Trans-impedance amplifier with increased dynamic range

#42
20170272043
2017-09-21

Generation of voltage reference signals in a hybrid switched mode amplifier

#43
20170230005
2017-08-10

Ultra-low working voltage rail-to-rail operational amplifier, and differential input amplification-stage circuit and output-stage circuit thereof

#44
20170187336
2017-06-29

Amplifier with nonlinearity compensation

#45
20170170787
2017-06-15

Apparatus and methods for power enhancement of self-biased distributed amplifiers with gate bias networks

#46
20170155365
2017-06-01

Amplifier arrangement and amplification method

#47
20170141748
2017-05-18

Amplifier system, controller of main amplifier and associated control method

#48
20170141737
2017-05-18

Apparatus and method for dynamically biased baseband current amplifier

#49
20170141733
2017-05-18

Distributed pole-zero compensation for an amplifier

#50
20170126189
2017-05-04

Gain enhancement using advanced correlated level shifting

#51
20170126186
2017-05-04

Apparatus, method, system and computer program for amplifying an audio signal

#52
20170093350
2017-03-30

Multi-stage amplifier with improved operating efficiency

#53
20170077883
2017-03-16

Self-regulated reference for switched capacitor circuit

#54
20170047903
2017-02-16

Automatically calibrating operational amplifier (op-amp) systems for mitigating effects of offset voltages

#55
20170040950
2017-02-09

Distributed amplifier with improved stabilization

#56
20170026030
2017-01-26

Multimode reconfigurable amplifier and analog filter including the same

#57
20170026007
2017-01-26

Feedback compensation for multistage amplifiers

#58
20170026004
2017-01-26

Off-state isolation enhancement for feedback amplifiers

#59
20160365836
2016-12-15

Switching supply delay compensation

#60
20160329869
2016-11-10

Amplifier with compensation of gain in low frequencies

#61
20160315588
2016-10-27

Method for an adaptive transconductance cell utilizing arithmetic operations

#62
20160301369
2016-10-13

BAND OPTIMISED RF SWITCH LOW NOISE AMPLIFIER

#63
20160301367
2016-10-13

Reference signal generation for lock-in amplifier in high sensitivity gas sensing system

#64
20160226457
2016-08-04

Implementing enhanced bias configuration for CMOS inverter based optical Transimpedance Amplifier

#65
20160218684
2016-07-28

Current analog audio amplifier

#66
20160204748
2016-07-14

High frequency signal amplifying circuitry

#67
20160149540
2016-05-26

Method and apparatus for current steering in high sensitivity, high linearity and large dynamic range high speed trans-impedance amplifiers

#68
20160142016
2016-05-19

Operational amplifier based circuit with compensation circuit block used for stability compensation

#69
20160072447
2016-03-10

Apparatus and method for dynamically biased baseband current amplifier

#70
20160056768
2016-02-25

Amplifier

#71
20160054748
2016-02-25

Constant output amplifier

#72
20160020735
2016-01-21

Power amplifier

#73
20150381126
2015-12-31

Switchable base feed circuit for radio-frequency power amplifiers

#74
20150349736
2015-12-03

Feedback amplifier

#75
20150295551
2015-10-15

Implicit feed-forward compensated op-amp with split pairs

#76
20150295544
2015-10-15

Amplifier circuit with overshoot suppression

#77
20150280663
2015-10-01

Semiconductor circuit and amplifier circuit

#78
20150279467
2015-10-01

Amplifier stage

#79
20150249444
2015-09-03

Apparatus and method of correcting output characteristics in a power combination apparatus

#80
20150236657
2015-08-20

Amplifier circuit

#81
20150236653
2015-08-20

Limiting amplifiers

#82
20150229280
2015-08-13

Nonlinear class AB input stage

#83
20150229274
2015-08-13

Fully differential signal system including common mode feedback circuit

#84
20150223864
2015-08-13

Electrosurgical apparatus with real-time RF tissue energy control

#85
20150198893
2015-07-16

AMPLIFICATION APPARATUS, ANTI-VIBRATION APPARATUS, LITHOGRAPHY APPARATUS, AND ARTICLE MANUFACTURING METHOD

#86
20150188500
2015-07-02

POWER AMPLIFIER

#87
20150155841
2015-06-04

Two-stage operational amplifier in class AB

#88
20150150753
2015-06-04

Instrumentation absolute value differential amplifier circuit and applications

#89
20150130537
2015-05-14

Power amplification module

#90
20150103066
2015-04-16

Output circuit, data driver and display device

#91
20150102858
2015-04-16

Distributed pole-zero compensation for an amplifier

#92
20150097611
2015-04-09

VOLTAGE FOLLOWER HAVING A FEED-FORWARD DEVICE

#93
20150070091
2015-03-12

Analog amplifiers and comparators

#94
20150054553
2015-02-26

Pulse width modulation circuit and voltage-feedback class-D amplifier circuit

#95
20140347131
2014-11-27

Semiconductor device and circuit with dynamic control of electric field

#96
20140320211
2014-10-30

Distributed amplifier with improved stabilization

#97
20140266422
2014-09-18

DC blocker for a high gain complex circuit

#98
20130266157
2013-10-10

Headphone amplifier

#99
20130135503
2013-05-30

Amplifier apparatus and methods using variable capacitance dependent on feedback gain

#100
20130088473
2013-04-11

Output circuit, data driver, and display device

#101
20130035679
2013-02-07

Electrosurgical apparatus with real-time RF tissue energy control

#102
20120229216
2012-09-13

Distributed amplifier with improved stabilization

#103
20120146729
2012-06-14

Amplifier device

#104
20120105155
2012-05-03

Pulse width modulation circuit and voltage-feedback class-D amplifier circuit

#105
20110305353
2011-12-15

Audio amplifier with closed-loop power

#106
20110025280
2011-02-03

Regulator having phase compensation circuit

#107
20110001565
2011-01-06

High-speed, multi-stage class AB amplifiers

#108
20100327887
2010-12-30

Chopper-stabilized instrumentation amplifier for impedance measurement

#109
20100321570
2010-12-23

Pulse width modulation circuit and voltage-feedback class-D amplifier circuit

#110
20100295620
2010-11-25

High-speed, multi-stage class AB amplifiers

#111
20100259329
2010-10-14

Field-plated transistor including feedback resistor

#112
20100259237
2010-10-14

Compensation circuit

#113
20100171549
2010-07-08

Variable gain amplifier circuit and filter circuit

#114
20100148875
2010-06-17

Circuit for compensation of leakage current-induced offset in a single-ended op-amp

#115
20100066449
2010-03-18

Three-stage frequency-compensated operational amplifier for driving large capacitive loads

#116
20100066335
2010-03-18

Power conversion regulator with predictive energy balancing

#117
20100052784
2010-03-04

Low noise amplifier

#118
20100033240
2010-02-11

Chopper-stabilized instrumentation amplifier for impedance measurement

#119
20090251219
2009-10-08

Amplifier arrangement and signal generation method

#120
20090195311
2009-08-06

Independent dominant pole compensation of two loops using one compensating element

#121
20090167407
2009-07-02

Operational amplifier and integrating circuit

#122
20090153247
2009-06-18

High-speed, multi-stage class AB amplifiers

#123
20090115528
2009-05-07

Low cost high performance power amplifier utilizing two-stage-included local negative feedback with feedback-shifting technology

#124
20090108937
2009-04-30

Low noise amplifier and differential amplifier

#125
20090066415
2009-03-12

Operational amplifier having high slew rate and stability, and operating method thereof

#126
20090027122
2009-01-29

Compact low-power class AB amplifier

#127
20080238552
2008-10-02

Semiconductor device

#128
20080231369
2008-09-25

Variable-gain low-noise amplifier

#129
20080231365
2008-09-25

Operational amplifier

#130
20080224767
2008-09-18

Semiconductor integrated circuit and method for adjusting a capacitance value of a phase compensating capacitor

#131
20080197924
2008-08-21

Variable gain amplifier circuit and filter circuit

#132
20080183098
2008-07-31

Chopper-stabilized instrumentation amplifier for impedance measurement

#133
20080157874
2008-07-03

Dynamic bandwidth compensating method and associated apparatus

#134
20080101803
2008-05-01

High dynamic range optical receiver

#135
20080061884
2008-03-13

Amplifier feedback and bias configuration

#136
20080048778
2008-02-28

Amplifier with common-mode feedback circuit

#137
20080024226
2008-01-31

Inverting amplifier

#138
20070296499
2007-12-27

AMPLIFIER CIRCUIT HAVING A COMPENSATION CIRCUIT COUPLED TO AN OUTPUT NODE OF AN OPERATIONAL AMPLIFIER FOR IMPROVING LOOP STABILITY

#139
20070285167
2007-12-13

Class AB amplifier circuit with combined quiescent current and common mode control

#140
20070229155
2007-10-04

Feedback amplifier

#141
20070194850
2007-08-23

Dynamically compensated operational amplifier

#142
20070183490
2007-08-09

PWM feedback/feed-forward protection

#143
20070164825
2007-07-19

Reduced-size sensor circuit

#144
20070152753
2007-07-05

System and method for clamping a differential amplifier

#145
20070132505
2007-06-14

Reference voltage generation circuit

#146
20070115060
2007-05-24

Power conversion regulator with exponentiating feedback loop

#147
20070103232
2007-05-10

Operational amplifier

#148
20070103122
2007-05-10

Power conversion regulator with predictive energy balancing

#149
20070096807
2007-05-03

Transconductance amplifiers with compensation

#150
20070085607
2007-04-19

Electronic circuit for amplification of a bipolar signal

#151
20070075783
2007-04-05

Handset radiofrequency front end module in fine pitch quad flat no lead (FQFP-N) package

#152
20070046376
2007-03-01

Neutralization of feedback capacitance in amplifiers

#153
20070013445
2007-01-18

Variable gain feedback amplifier circuit apparatus and method therefor

#154
20060250184
2006-11-09

SiGe differential cascode amplifier with miller effect resonator

#155
20060234654
2006-10-19

Wireless communication unit and linearised transmitter circuit therefor

#156
20060214726
2006-09-28

Q value correction of filter circuit

#157
20060192609
2006-08-31

Reference voltage generating circuit with ultra-low power consumption

#158
20060176108
2006-08-10

Frequency stabilization of chopper-stabilized amplifiers

#159
20060164164
2006-07-27

Variable gain amplifier with low phase variation

#160
20060152280
2006-07-13

Systems, methods and devices for differential active bias of multi-stage amplifiers

#161
20060055456
2006-03-16

Phase corrected miller compensation of chopper and nested chopper amplifiers

#162
20050285674
2005-12-29

Adapting operational amplifier frequency response respective to closed loop gain

#163
20050264357
2005-12-01

Gain boosted operational amplifier having a field effect transistor with a well biasing scheme

#164
20050206444
2005-09-22

Methods and systems for decoupling the stabilization of two loops

#165
20050001683
2005-01-06

MOSFET well biasing scheme that mitigates body effect

#166
15149281
2017-08-29

Transimpedance amplifier

#167
15097700
2017-10-03

N-stacked field effect transistor based traveling wave power amplifier for monolithic microwave integrated circuits

#168
14872328
2017-02-14

Auxiliary control of system offsets

#169
14634890
2016-05-17

Operational amplifier and method of amplifying with the operational amplifier

#170
13940261
2015-01-06

Trans-capacitance amplifier with picoAmperes input biasing and large output swing