ClassID:

219374

H03F3/45237 - 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 implementation of the active amplifying circuit in the differential amplifier using MOSFET transistors as the active amplifying circuit Complementary long tailed pairs having parallel inputs and being supplied in series

Sub-classes:
Recent Application in this class:
#1
20260100685
2026-04-09

CURRENT MIRROR OPERATIONAL TRANSCONDUCTANCE AMPLIFIER

#2
20260045912
2026-02-12

Second Order Intermodulation Injection for Non-linearity Cancellation

#3
20250293652
2025-09-18

VARIABLE INDUCTANCE SYSTEMS AND METHODS FOR HIGH FREQUENCY GAIN CONTROL

#4
20240223144
2024-07-04

TWO-STAGE COMMON-MODE FEEDBACK CIRCUIT AND FULLY DIFFERENTIAL OPERATIONAL AMPLIFIER INCLUDING THE SAME

#5
20240223141
2024-07-04

DRIVE CIRCUIT FOR INDUCTIVE POSITION TRANSDUCER SYSTEM

#6
20240219235
2024-07-04

OPTICAL SENSING MODULE, SYSTEM AND METHOD FOR OPERATING OPTICAL SENSING SYSTEM

#7
20210072293
2021-03-11

Differential current sensing bussing method

#8
20200404208
2020-12-24

Electronic circuit for configuring amplifying circuit configured to output voltage including low noise

#9
20200395906
2020-12-17

Transconductance amplifier circuitry

#10
20200382072
2020-12-03

Amplifier circuit with high-order damping circuit and the high-order damping circuit

#11
20200366260
2020-11-19

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

#12
20190372536
2019-12-05

Transconductor system for a power supply system

#13
20190326896
2019-10-24

Wide range input voltage differential receiver

#14
20190260334
2019-08-22

Operational amplifier circuit capable of improving linearity relation between loading current and input voltage difference

#15
20190229689
2019-07-25

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

#16
20190140606
2019-05-09

Transconductor systems

#17
20190049489
2019-02-14

Differential current sensing bussing method

#18
20180337642
2018-11-22

Operational amplifier circuit capable of improving linearity relation between loading current and input voltage difference

#19
20180323760
2018-11-08

High gain differential amplifier with common-mode feedback

#20
20180316360
2018-11-01

Complementary current reusing preamp for operational amplifier

#21
20180241351
2018-08-23

Linear amplifier having higher efficiency for envelope tracking modulator

#22
20180219518
2018-08-02

Power supplying apparatus for neural activity recorder reducing common-mode signal applied to electrodes connected to the neural activity recorder

#23
20180076201
2018-03-15

SEMICONDUCTOR DEVICE

#24
20170338782
2017-11-23

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

#25
20170230054
2017-08-10

Telescopic amplifier with improved common mode settling

#26
20170093349
2017-03-30

Differential amplifiers with improved slew performance

#27
20170040957
2017-02-09

Power amplifier having stack structure

#28
20170005622
2017-01-05

Amplifier arrangement

#29
20160373078
2016-12-22

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

#30
20160065133
2016-03-03

Power-efficient chopper amplifier

#31
20150372651
2015-12-24

Complementary current reusing preamp for operational amplifier

#32
20150333705
2015-11-19

High speed, rail-to-rail CMOS differential input stage

#33
20150295551
2015-10-15

Implicit feed-forward compensated op-amp with split pairs

#34
20150270811
2015-09-24

Operational amplifier and driving circuit

#35
20150200648
2015-07-16

Operational transconductance amplifier, operational transconductance amplifier-capacitor filter and high order reconfigurable analog filter

#36
20150171804
2015-06-18

Power amplifier having stack structure

#37
20140300403
2014-10-09

Signal processing device

#38
20140266439
2014-09-18

Methods and systems to provide low noise amplification

#39
20140085007
2014-03-27

Class-AB radio frequency amplifier for envelope detector

#40
20140035674
2014-02-06

Conditionally-stable operational amplifier with tunable wideband buffers

#41
20140003162
2014-01-02

Small signal receiver and integrated circuit including the same

#42
20130181775
2013-07-18

Rail-to rail input circuit

#43
20130128642
2013-05-23

Signal level detector and method thereof

#44
20130106513
2013-05-02

Differential amplifier

#45
20130093516
2013-04-18

Low output impedance RF amplifier

#46
20130033324
2013-02-07

Amplifier and associated receiver

#47
20120307122
2012-12-06

Low common mode driver

#48
20120049960
2012-03-01

Pre-driver and digital transmitter using the same

#49
20120007681
2012-01-12

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

#50
20110156819
2011-06-30

Low-noise high efficiency bias generation circuits and method

#51
20110148524
2011-06-23

Radio frequency buffer

#52
20110133838
2011-06-09

Low output impedance RF amplifier

#53
20110063031
2011-03-17

Driving apparatus and driving method thereof

#54
20110050341
2011-03-03

High speed rail to rail phase splitter for providing a symmetrical differential output signal having low skew

#55
20100073214
2010-03-25

Differential operational amplifier circuit correcting settling error for use in pipelined A/D converter

#56
20090267691
2009-10-29

Amplifier circuit

#57
20090108933
2009-04-30

Compensation for amplifiers driving a capacitive load

#58
20090108882
2009-04-30

Low power low voltage differential signaling (LVDS) output drivers

#59
20090091389
2009-04-09

LVDS receiver circuit

#60
20090023413
2009-01-22

Cross coupled high frequency buffer

#61
20080309411
2008-12-18

Radio frequency signal amplifying device

#62
20080258812
2008-10-23

High speed differential receiver with rail to rail common mode operation having a symmetrical differential output signal with low skew

#63
20080238521
2008-10-02

Low differential output voltage circuit

#64
20080218267
2008-09-11

Amplifier with level shifting feedback network

#65
20080157825
2008-07-03

Driving apparatus and driving method thereof

#66
20080111638
2008-05-15

Delay stage, ring oscillator, PLL-circuit and method

#67
20080111626
2008-05-15

Rail-to-rail class-AB operational amplifier

#68
20080070540
2008-03-20

RF amplifier

#69
20080036507
2008-02-14

Differential signal transmission and reception circuit capable of reducing power consumption

#70
20070247229
2007-10-25

Apparatus, amplifier, system and method for receiver equalization

#71
20070247228
2007-10-25

Apparatus for receiver equalization

#72
20070075775
2007-04-05

Amplifier

#73
20070046367
2007-03-01

Method and apparatus for presetting an amplifier

#74
20060291572
2006-12-28

Method and system for a configurable Vcc reference and Vss reference differential current mode transmitter

#75
20060139066
2006-06-29

Differential input buffer circuit with rail-to-rail input range

#76
20050275464
2005-12-15

Transistor amplifying stage

#77
20050128002
2005-06-16

Bias circuit for a display driver operational amplifier

#78
20050127998
2005-06-16

Operational amplifier and driver circuit using the same

#79
20050088235
2005-04-28

System and apparatus for receiver equalization

#80
20050035789
2005-02-17

Output circuit device for clock signal distribution in high-speed signal transmission

#81
16579817
2020-07-07

Receiver circuit and operation method

#82
15808002
2019-02-05

Transconductor systems

#83
15481710
2018-05-08

Radio frequency power amplifier and method thereof