ClassID:

220129

H03F2203/45648 - CPC Classification

Classification description:

Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by; Indexing scheme relating to differential amplifiers the LC comprising two current sources, which are not cascode current sources

Recent Application in this class:
#1
20250183859
2025-06-05

TRANS-IMPEDANCE AMPLIFIER FOR ULTRASOUND DEVICE AND RELATED APPARATUS AND METHODS

#2
20240120891
2024-04-11

Trans-impedance amplifier for ultrasound device and related apparatus and methods

#3
20210384872
2021-12-09

Trans-impedance amplifier for ultrasound device and related apparatus and methods

#4
20190140603
2019-05-09

Trans-impedance amplifier for ultrasound device and related apparatus and methods

#5
20180183394
2018-06-28

Dynamic amplifier and chip using the same

#6
20170163225
2017-06-08

Trans-impedance amplifier for ultrasound device and related apparatus and methods

#7
20160142016
2016-05-19

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

#8
20160112016
2016-04-21

Silicon photonics modulator driver

#9
20150270811
2015-09-24

Operational amplifier and driving circuit

#10
20150146884
2015-05-28

Circuit for suppressing audio output noise and audio output circuit

#11
20150103066
2015-04-16

Output circuit, data driver and display device

#12
20140184331
2014-07-03

Amplifier circuits and methods of amplifying an input signal

#13
20140159814
2014-06-12

Differential receiver

#14
20140112418
2014-04-24

Receiver using impedance shaping

#15
20140084999
2014-03-27

Apparatus and method for wide common mode difference

#16
20140062594
2014-03-06

Chip card

#17
20130342274
2013-12-26

DC-coupled peak detector

#18
20130147556
2013-06-13

Squelch detection method and circuit using rectifying circuit for detecting out-of-band signal

#19
20130147555
2013-06-13

Squelch detection method and circuit using dual rectifying circuit for detecting out-of-band signal

#20
20130134988
2013-05-30

Method and system for high gain auto-zeroing arrangement for electronic circuits

#21
20130113569
2013-05-09

Cross-coupled multipath feedforward operational amplifiers

#22
20130099863
2013-04-25

Fourth-order electrical current source apparatus, systems and methods

#23
20130088473
2013-04-11

Output circuit, data driver, and display device

#24
20130069721
2013-03-21

Amplifying circuit

#25
20130043952
2013-02-21

Circuit and method for adjusting an offset output current for an input current amplifier

#26
20130002636
2013-01-03

LCD driving circuit using operational amplifier and LCD display apparatus using the same

#27
20120293261
2012-11-22

Amplifier with start-up common mode feedback

#28
20120169422
2012-07-05

Amplifier with non-linear current mirror

#29
20120105109
2012-05-03

OUTPUT STAGE, AMPLIFIER CONTROL LOOP AND USE OF THE OUTPUT STAGE

#30
20120064836
2012-03-15

Amplifier circuit for a ranging transceiver

#31
20110260795
2011-10-27

Method for reducing offset voltage of operational amplifier and the circuit using the same

#32
20110241916
2011-10-06

Re-configurable multipurpose analog interface

#33
20110148380
2011-06-23

Circuit and method for adjusting an offset output current for an input current amplifier

#34
20110141092
2011-06-16

Differential amplifier and control method for the same

#35
20110121802
2011-05-26

Low dropout regulator circuit without external capacitors rapidly responding to load change

#36
20110102083
2011-05-05

High performance LVDS driver for scalable supply

#37
20110096186
2011-04-28

Fully-differential amplifier, photoelectric conversion apparatus including fully-differential amplifier, and image-pickup system

#38
20110074508
2011-03-31

Voltage regulator operable to switch between a two-stage structure operation and a three-stage structure operation

#39
20110032233
2011-02-10

LCD driving circuit using operational amplifier and LCD display apparatus using the same

#40
20100327940
2010-12-30

Embedded phase noise measurement system

#41
20100308915
2010-12-09

Phase margin modification in operational transconductance amplifiers

#42
20100301938
2010-12-02

Operational amplification circuit

#43
20100295618
2010-11-25

Differential amplifier, reference voltage generating circuit, differential amplifying method, and reference voltage generating method

#44
20100264987
2010-10-21

Amplifier with bias stabilizer

#45
20100259237
2010-10-14

Compensation circuit

#46
20100244961
2010-09-30

Differential amplifier

#47
20100231301
2010-09-16

Amplifier circuit

#48
20100164626
2010-07-01

Boost operational amplifier

#49
20100164624
2010-07-01

Method for reducing offset voltage of operational amplifier and the circuit using the same

#50
20100148868
2010-06-17

Differential amplifier

#51
20100134173
2010-06-03

Integrator-based common-mode stabilization technique for pseudo-differential switched-capacitor circuits

#52
20100128898
2010-05-27

METHOD AND APPARATUS FOR OPERATION SEQUENCING OF AUDIO AMPLIFIERS

#53
20100123705
2010-05-20

Operational amplifier and display panel driving device

#54
20100109774
2010-05-06

Operational amplifier

#55
20100039179
2010-02-18

Folded cascode operational amplifier having improved phase margin

#56
20100033250
2010-02-11

Differential amplifier

#57
20100026386
2010-02-04

Amplifier front-end with low-noise level shift

#58
20100007420
2010-01-14

Operational amplifier

#59
20090322428
2009-12-31

Tunable linear operational transconductance amplifier

#60
20090295484
2009-12-03

Low bias current amplifier

#61
20090295482
2009-12-03

Driving amplifier circuit with digital control

#62
20090289712
2009-11-26

Amplifier circuit

#63
20090267585
2009-10-29

Cascode current mirror circuit, bandgap circuit, reference voltage circuit having the cascode current mirror circuit and the bandgap circuit, and voltage stabilizing/regulating circuit having the reference voltage circuit

#64
20090261904
2009-10-22

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

#65
20090231039
2009-09-17

Differential amplifier

#66
20090231038
2009-09-17

Differential amplifier

#67
20090179876
2009-07-16

Buffer amplifier with minimized power consumption and display driver including the same

#68
20090146738
2009-06-11

Operational amplifier

#69
20090102560
2009-04-23

Slew-enhanced input stages and amplifiers

#70
20090091385
2009-04-09

Differential amplifier circuit

#71
20080309408
2008-12-18

Symmetrical differential amplifier

#72
20080290945
2008-11-27

Class AB output stage and method for providing wide supply voltage range

#73
20080290943
2008-11-27

Multi-mode amplifier arrangement and method for controlling an amplifier arrangement

#74
20080272849
2008-11-06

Active baluns

#75
20080106335
2008-05-08

Differential circuit

#76
20080070540
2008-03-20

RF amplifier

#77
20080054949
2008-03-06

High gain, high speed comparator operable at low current

#78
20080024220
2008-01-31

Gain-controlled amplifier

#79
20080024218
2008-01-31

Amplifier stage, operational amplifier and method for amplifying a signal

#80
20080001662
2008-01-03

Operational amplifier of class AB

#81
20070273443
2007-11-29

Operational amplifier circuit

#82
20070170993
2007-07-26

Differential amplifier having an improved slew rate

#83
20070152744
2007-07-05

Variable gain voltage/current converter circuit having current compensation circuit for compensating for change in DC current flowing into active element for performing voltage/current conversion

#84
20060262446
2006-11-23

Preamplifier circuit and method for a disk drive device

#85
20060226877
2006-10-12

Operational amplifier with less offset

#86
20060125522
2006-06-15

Output stage, amplifier control loop and use of the output stage

#87
20050162228
2005-07-28

Power amplifier

#88
20050088238
2005-04-28

High speed amplifier incorporating pre-emphasis

#89
20050030092
2005-02-10

Active filter circuit with operational amplifier