ClassID:

219476

H03F3/45968 - CPC Classification

Classification description:

Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements; Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection using IC blocks as the active amplifying circuit by offset reduction

Sub-classes:
Recent Application in this class:
#1
20250300616
2025-09-25

SYSTEMS AND METHODS FOR HIGH ACCURACY OPEN LOOP TRANSCONDUCTANCE AMPLIFIER HAVING GAIN SET BY OUTPUT LOAD

#2
20240380371
2024-11-14

DE-SKEWING DIFFERENTIAL SIGNALS

#3
20240333271
2024-10-03

DIFFERENTIAL CHOPPER COMPARATOR CAPABLE OF REMOVING KICKBACK NOISE

#4
20240275347
2024-08-15

CHARGE AMPLIFICATION CIRCUITS AND METHODS

#5
20240235505
2024-07-11

CIRCUIT FOR DEVICE TEMPERATURE PROTECTION

#6
20240146270
2024-05-02

DIRECT CURRENT OFFSET CURRENT CANCELLATION CIRCUIT AND METHOD, RELATED DEVICE, AND SYSTEM

#7
20240056044
2024-02-15

PRECISION OPERATIONAL AMPLIFIER USING FLOATING INPUT STAGE

#8
20220416743
2022-12-29

Charge amplification circuits and methods

#9
20220231639
2022-07-21

Fast settling ripple reduction loop for high speed precision chopper amplifiers

#10
20220204185
2022-06-30

Offset compensated photodiode amplifier

#11
20220173747
2022-06-02

System and methods for mixed-signal computing

#12
20220085779
2022-03-17

Semiconductor integrated circuit, receiving device, and DC offset cancellation method

#13
20210159866
2021-05-27

Switched capacitor amplifier circuit, voltage amplification method, and infrared sensor device

#14
20210143832
2021-05-13

System and methods for mixed-signal computing

#15
20210018373
2021-01-21

Amplifier capable of cancelling offset and sensor capable of cancelling offset component

#16
20200386617
2020-12-10

Method to operate an optical sensor arrangement with improved offset correction and optical sensor arrangement

#17
20200366260
2020-11-19

Method and system for a feedback transimpedance amplifier with sub-40khz low-frequency cutoff

#18
20200358412
2020-11-12

Amplifier nonlinear offset drift correction

#19
20200313637
2020-10-01

Current sensor integrated circuit with common mode voltage rejection

#20
20200280290
2020-09-03

Offset correction for pseudo differential signaling

#21
20200083897
2020-03-12

System and methods for mixed-signal computing

#22
20200021248
2020-01-16

Common mode rejection including temperature drift correction

#23
20190326921
2019-10-24

System and methods for mixed-signal computing

#24
20190229689
2019-07-25

Method and system for a feedback transimpedence amplifier with sub-40KHZ low-frequency cutoff

#25
20190149105
2019-05-16

On-chip resistor divider compensation with a 2VRMS input

#26
20190123701
2019-04-25

Amplifier flicker noise and offset mitigating systems and methods

#27
20190029548
2019-01-31

IMPEDANCE BOOTSTRAP CIRCUIT FOR AN INTERFACE OF A MONITORING DEVICE

#28
20190012979
2019-01-10

Semiconductor device, display device, and electronic device

#29
20180331667
2018-11-15

Switched capacitor amplifier circuit, voltage amplification method, and infrared sensor device

#30
20180287567
2018-10-04

Differential amplification device

#31
20180109326
2018-04-19

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

#32
20180091103
2018-03-29

Ripple reduction method for chopper amplifiers

#33
20170338782
2017-11-23

Method and system for a feedback transimpedance amplifier with sub-40khz low-frequency cutoff

#34
20170302238
2017-10-19

DC offset cancellation circuit

#35
20170263205
2017-09-14

Semiconductor device, display device, and electronic device

#36
20170115684
2017-04-27

Switched-capacitor bandgap reference circuit using chopping technique

#37
20160373078
2016-12-22

Method and system for a feedback transimpedance amplifier with sub-40KHZ low-frequency cutoff

#38
20160285563
2016-09-29

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

#39
20160269027
2016-09-15

Output buffer with offset cancellation structure and offset cancellation method using the same

#40
20160261246
2016-09-08

Transimpedance amplifier circuit

#41
20160118970
2016-04-28

Peak detector using charge pump and burst-mode transimpedance amplifier

#42
20160066806
2016-03-10

Impedance bootstrap circuit for an interface of a monitoring device

#43
20150288336
2015-10-08

Apparatus and methods for multi-channel autozero and chopper amplifiers

#44
20150229278
2015-08-13

Chopped operational-amplifier (OP-AMP) system

#45
20150092819
2015-04-02

Sensor signal output circuit and method for adjusting it

#46
20150069997
2015-03-12

Manufacturing method for current sensor and current sensor

#47
20150022268
2015-01-22

DC offset cancellation circuit

#48
20140291489
2014-10-02

Method and system for a feedback transimpedance amplifier with sub-40khz low-frequency cutoff

#49
20140285257
2014-09-25

Apparatus and method for amplifying signal

#50
20140240041
2014-08-28

Operational amplifier circuit

#51
20140185835
2014-07-03

One-bit digital-to-analog converter offset cancellation

#52
20140146926
2014-05-29

Receiver with adaptive filter and gain control

#53
20140139285
2014-05-22

Chopper amplifier

#54
20140098974
2014-04-10

Pop/click noise reduction circuitry for power-up and power-down of audio output circuitry

#55
20130328627
2013-12-12

Impedance bootstrap circuit for an interface of a monitoring device

#56
20130208922
2013-08-15

Integrated amplifier for driving acoustic transducers

#57
20130147559
2013-06-13

Fully differential autozeroing amplifier

#58
20130147553
2013-06-13

Auto-zero amplifier and feedback amplifier circuit using the auto-zero amplifier

#59
20130082776
2013-04-04

Amplifier for receiving optical signals complementary to each other

#60
20130043950
2013-02-21

Common mode input control for switch capacitor amplifier in pipeline analog-to-digital converter

#61
20120326785
2012-12-27

Difference amplifier arrangement with transconductance amplifier based current compensation

#62
20120249243
2012-10-04

Low switching error, small capacitors, auto-zero offset buffer amplifier

#63
20120169421
2012-07-05

Audio amplifying circuit with improved noise performance

#64
20120161991
2012-06-28

Offset cancellation for analog to digital converters

#65
20120082265
2012-04-05

Amplitude control circuit, polar modulation transmission circuit, and polar modulation method

#66
20120007681
2012-01-12

Method and system for a feedback transimpedance amplifier with sub-40khz low-frequency cutoff

#67
20110316629
2011-12-29

Offset cancellation for differential circuits

#68
20110169575
2011-07-14

Amplifier circuit and integrated circuit therefor

#69
20110140773
2011-06-16

Circuits and methods for calibrating offset in an amplifier

#70
20110121880
2011-05-26

DC offset cancellation circuit

#71
20110074503
2011-03-31

Operational amplifier

#72
20110019301
2011-01-27

Systems and methods for high order asymmetry correction

#73
20100327887
2010-12-30

Chopper-stabilized instrumentation amplifier for impedance measurement

#74
20100308912
2010-12-09

Amplifying circuit with offset compensation

#75
20100301917
2010-12-02

Level shift circuit

#76
20100289568
2010-11-18

Low-noise, low-power, low drift offset correction in operational and instrumentation amplifiers

#77
20100237936
2010-09-23

Amplifier circuit and magnetic sensor

#78
20100202178
2010-08-12

Offset removal circuit, associative memory including the same, and offset voltage removal method

#79
20100182080
2010-07-22

DC-offset cancelled programmable gain array for low-voltage wireless LAN system and method using the same

#80
20100176879
2010-07-15

Method and device for performing offset cancellation in an amplifier using floating-gate transistors

#81
20100156469
2010-06-24

High-speed multi-stage voltage comparator

#82
20100033240
2010-02-11

Chopper-stabilized instrumentation amplifier for impedance measurement

#83
20090316935
2009-12-24

Digital microphone

#84
20090315549
2009-12-24

Method for processing sensor signals subject to an offset and sensor arrangement designed to carry out the method

#85
20090261904
2009-10-22

Multi-input operational amplifier and method for reducing input offset thereof

#86
20090259418
2009-10-15

Current-voltage conversion circuit

#87
20090195433
2009-08-06

Multistage amplifier and a method of settling the multistage amplifier

#88
20090179699
2009-07-16

Fully differential comparator and fully differential amplifier

#89
20090167432
2009-07-02

INSTRUMENTATION AMPLIFICATION WITH INPUT OFFSET ADJUSTMENT

#90
20090137220
2009-05-28

Variable gain amplifier and receiver including the same

#91
20090108929
2009-04-30

Apparatuses and methods for providing offset compensation for operational amplifier

#92
20090085632
2009-04-02

Low-offset input circuit including amplifier circuit to correct circuit characteristics to cancel offset of the input circuit

#93
20090072903
2009-03-19

Variable gain amplifier having variable gain DC offset loop

#94
20090067545
2009-03-12

Receiver of high speed digital interface

#95
20090058525
2009-03-05

Common-mode bandwidth reduction circuit and method for differential applications

#96
20090051439
2009-02-26

Transconductance signal capacity format

#97
20090027125
2009-01-29

Common mode rejection calibration method for difference amplifiers

#98
20090009240
2009-01-08

Amplifier circuit

#99
20090009239
2009-01-08

Low glitch offset correction circuit for auto-zero sensor amplifiers and method

#100
20080303577
2008-12-11

Arrangement for canceling offset of driver amplifier circuitry

#101
20080278141
2008-11-13

RF power sensing circuit

#102
20080258809
2008-10-23

Amplifier device capable of reducing offset voltage

#103
20080204567
2008-08-28

SAMPLE AND HOLD CIRCUITS WITH BUFFER OFFSET REMOVED

#104
20080186091
2008-08-07

Dual transconductance amplifiers and differential amplifiers implemented using such dual transconductance amplifiers

#105
20080183098
2008-07-31

Chopper-stabilized instrumentation amplifier for impedance measurement

#106
20080157846
2008-07-03

DC offset calibration apparatus and method

#107
20080135735
2008-06-12

SIGNAL-ENHANCEMENT SYSTEM FOR PHOTODETECTOR OUTPUTS

#108
20080122536
2008-05-29

Three-stage amplifier

#109
20080095266
2008-04-24

Adaptive controller for linearization of transmitter with impairments

#110
20080054999
2008-03-06

Input offset voltage corrector

#111
20080048773
2008-02-28

Method and apparatus for DC offset cancellation in amplifiers

#112
20070296481
2007-12-27

Offset adjusting apparatus

#113
20070290746
2007-12-20

Control of an adjustable gain amplifier

#114
20070257733
2007-11-08

AMPLIFIER SYSTEM WITH CURRENT-MODE SERVO FEEDBACK

#115
20070247218
2007-10-25

DC offset cancellation apparatus

#116
20070236285
2007-10-11

Full swing amplifying circuit and applications thereof

#117
20070222506
2007-09-27

Op driver with the function of canceling op offset

#118
20070210860
2007-09-13

Method and device for performing offset cancellation in an amplifier using floating-gate transistors

#119
20070188223
2007-08-16

Operational amplifier

#120
20070170982
2007-07-26

Circuit utilizing op-sharing technique and related method thereof

#121
20070170981
2007-07-26

Notch filter for ripple reduction in chopper stabilized amplifiers

#122
20070153945
2007-07-05

DC offset correction for high gain complex filter

#123
20070129903
2007-06-07

Digital signal offset adjusting apparatus and pulse pattern generator using the same

#124
20070126499
2007-06-07

Multi-phase techniques for tuning and/or measuring operations of an amplifier

#125
20070109043
2007-05-17

Operational amplifier with zero offset

#126
20070096829
2007-05-03

Output offset protection for power amplifier

#127
20070090873
2007-04-26

Offset canceller for compensating for offset in signal output

#128
20070013439
2007-01-18

Circuit arrangement having an amplifier arrangement and an offset compensation arrangement

#129
20070013438
2007-01-18

Chopper-stabilized operational amplifier and method

#130
20070002912
2007-01-04

Laser power control circuit

#131
20070001758
2007-01-04

Multiple differential amplifier system and method for transconductance mismatch compensation

#132
20060290408
2006-12-28

Temperature compensation circuit

#133
20060279353
2006-12-14

Chopper stabilized amplifier without DC output ripple

#134
20060231741
2006-10-19

Sensor including circuitry for recovering time-varying information and removing DC offsets

#135
20060223472
2006-10-05

DC cancellation circuit

#136
20060220734
2006-10-05

Method and circuit for input offset correction in an amplifier circuit

#137
20060215787
2006-09-28

Data receiver including a transconductance amplifier

#138
20060214731
2006-09-28

Differential two-stage miller compensated amplifier system with capacitive level shifting

#139
20060214689
2006-09-28

Differential output driver and semiconductor device having the same

#140
20060208792
2006-09-21

Amplification system capable of reducing DC offset

#141
20060197597
2006-09-07

Ultra low-frequency response, DC-blocked low-noise amplifier

#142
20060197592
2006-09-07

VARIABLE GAIN AMPLIFIER

#143
20060186954
2006-08-24

Amplifier arrangement, and method for compensating for an offset

#144
20060109050
2006-05-25

Apparatus for removing DC offset and amplifying signal with variable gain simultaneously

#145
20060103461
2006-05-18

System, method and apparatus for providing ground separation between different environments

#146
20060103426
2006-05-18

Compensation circuits for unequal input/output common mode voltages

#147
20060086891
2006-04-27

Signal-enhancement system for photodetector outputs

#148
20060068749
2006-03-30

Low noise filter for a wireless receiver

#149
20060055456
2006-03-16

Phase corrected miller compensation of chopper and nested chopper amplifiers

#150
20060017603
2006-01-26

Charge comparator with low input offset

#151
20050285678
2005-12-29

Differential amplifier with adaptive biasing and offset cancellation

#152
20050271162
2005-12-08

Techniques to adjust vertical offset

#153
20050251352
2005-11-10

Measurement interface optimized for both differential and single-ended inputs

#154
20050184801
2005-08-25

Correcting DC offsets in a multi-stage amplifier

#155
20050140399
2005-06-30

Analog buffer and method for driving the same

#156
20050127990
2005-06-16

Method and circuit for reduced setting time in an amplifier

#157
20050118980
2005-06-02

Variable rate RC calibration circuit with filter cut-off frequency programmability

#158
20050116773
2005-06-02

Amplifier system with current-mode servo feedback

#159
20050116769
2005-06-02

Sensor device and a signal amplification device of a small detection signal provided by the sensor

#160
20050114047
2005-05-26

Measurement interface optimized for both differential and single-ended inputs

#161
16285619
2019-08-20

System and methods for mixed-signal computing