ClassID:

219444

H03F3/45636 - 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 in differential amplifiers with FET transistors as the active amplifying circuit by using feedback means

Sub-classes:
Recent Application in this class:
#1
20250219603
2025-07-03

AMPLIFYING CIRCUIT AND AMPLIFYING DEVICE

#2
20250183863
2025-06-05

TRANSCONDUCTANCE AMPLIFIER CIRCUIT AND DC-DC CONVERTER USING THE TRANSCONDUCTANCE AMPLIFIER CIRCUIT

#3
20250112605
2025-04-03

FEEDFORWARD-BASED COMMON-MODE FEEDBACK SCHEME FOR OPAMPS

#4
20250096759
2025-03-20

CONCEPT FOR A BUFFERED FLIPPED VOLTAGE FOLLOWER AND FOR A LOW DROPOUT VOLTAGE REGULATOR

#5
20240339977
2024-10-10

AMPLIFIER WITH INPUT AND OUTPUT COMMON-MODE CONTROL IN A SINGLE AMPLIFICATION STAGE

#6
20240214077
2024-06-27

RECEIVER CIRCUIT AND OPTICAL RECEIVER CIRCUIT

#7
20240039493
2024-02-01

AMPLIFICATION CIRCUIT

#8
20230122632
2023-04-20

Signal compensation with summed error signals

#9
20220352858
2022-11-03

Operational amplifier and method for operating an operational amplifier

#10
20220302889
2022-09-22

Differential amplifier circuit, reception circuit, and semiconductor integrated circuit

#11
20220103142
2022-03-31

Concept for a buffered flipped voltage follower and for a low dropout voltage regulator

#12
20220052661
2022-02-17

Multi-channel common-mode coupled AC gain amplifier

#13
20220045647
2022-02-10

Amplifier circuit using voltage-to-current conversion and associated envelope tracking supply modulator using the same

#14
20210399702
2021-12-23

Error amplifier device

#15
20210152137
2021-05-20

METHODS AND APPARATUS FOR AN AMPLIFIER CIRCUIT

#16
20210135641
2021-05-06

Clock drive circuit

#17
20210104986
2021-04-08

Fully differential amplifier including feedforward path

#18
20210044266
2021-02-11

Memories for receiving or transmitting voltage signals

#19
20200380328
2020-12-03

Low energy transmitter

#20
20200358414
2020-11-12

Operational amplifier and chip

#21
20200304086
2020-09-24

Apparatus for receiving or transmitting voltage signals

#22
20200218955
2020-07-09

Low energy transmitter

#23
20200112288
2020-04-09

Methods and apparatus for an amplifier circuit

#24
20200007099
2020-01-02

Amplifier class AB output stage

#25
20190379984
2019-12-12

MEMS transducer amplifiers

#26
20190319596
2019-10-17

Low voltage inverter-based amplifier

#27
20190319581
2019-10-17

Oscillating circuit and method for calibrating a resonant frequency of an LC tank of an injection-locked oscillator (ILO) of the oscillating circuit while stopping self-oscillation of the ILO

#28
20190317189
2019-10-17

Frequency-modulated continuous-wave radar system and frequency tracking method for calibrating frequency gains of a radio frequency signal to approach wideband flatness frequency responses

#29
20190288656
2019-09-19

Chopper stabilized amplifier

#30
20190280659
2019-09-12

Amplifier class AB output stage

#31
20190199305
2019-06-27

Magnetic disk device capable of adjusting frequency of output signals for an in-phase AC current signal inputs

#32
20190103892
2019-04-04

Channel select filter having a fully differential transresistance amplifier and CMOS current amplifier

#33
20180270588
2018-09-20

MEMS transducer amplifiers

#34
20180234056
2018-08-16

Two-stage operational amplifier

#35
20180191320
2018-07-05

Amplifier with auxiliary path for maximizing power supply rejection ratio

#36
20180152156
2018-05-31

Operational amplifier and differential amplifying circuit thereof

#37
20180069510
2018-03-08

Frequency selective low noise amplifier circuit

#38
20170163227
2017-06-08

Analog amplifier for recovering abnormal operation of common mode feedback

#39
20170140725
2017-05-18

Overdrive amplifier and semiconductor device

#40
20170111018
2017-04-20

Chopper stabilized amplifier

#41
20160380644
2016-12-29

Telescopic amplifier with improved common mode settling

#42
20160226451
2016-08-04

Circuits and methods for switched-mode operational amplifiers

#43
20150341075
2015-11-26

Amplifier utilizing a configurable interface to a front end module

#44
20150200635
2015-07-16

Operational transconductance amplifier, reconfigurable fully differential voltage sensing amplifier and reconfigurable fully differential capacitive sensing amplifier

#45
20150061764
2015-03-05

ANALOG AMPLIFIER FOR RECOVERING ABNORMAL OPERATION OF COMMON MODE FEEDBACK

#46
20150035598
2015-02-05

Common-mode feedback differential amplifier

#47
20140266445
2014-09-18

Low-power inverter-based differential amplifier

#48
20140112418
2014-04-24

Receiver using impedance shaping

#49
20140028395
2014-01-30

Op-Amp sharing by swapping trans-conductance cells

#50
20130154733
2013-06-20

METHOD FOR SYNTHESIZING SIGMA-DELTA MODULATOR

#51
20120161844
2012-06-28

Flexible low noise, high linearity, high frequency, low power, fully differential mixer and class AB post-mixer amplifier system for SDR applications

#52
20120075022
2012-03-29

Differential amplifier

#53
20110025417
2011-02-03

Signal processing circuit with improved linearity

#54
20100321082
2010-12-23

Method and device for controlling a common-mode voltage of a switched-capacitor system, in particular an analog-to-digital converter

#55
20090058529
2009-03-05

Resistively loaded single stage differential amplifier having zero volt common mode input

#56
20090058528
2009-03-05

Pre-amplifier for a receiver and a method therefor

#57
20090021306
2009-01-22

Integrated circuit system for line regulation of an amplifier

#58
20080112712
2008-05-15

Bandpass filter circuit, band-elimination filter circuit, infrared signal processing circuit

#59
20070257712
2007-11-08

Low Current, High Gain, Single to Differential Buffer

#60
20070229161
2007-10-04

Voltage-to-current converter

#61
20070194849
2007-08-23

Method for nullifying temperature dependence and circuit therefor

#62
20060214827
2006-09-28

Amplifier gain calibration system and method

#63
20060049852
2006-03-09

Sense amplifier with low common mode differential input signal

#64
15962844
2019-05-28

Communication circuit including voltage mode harmonic-rejection mixer (HRM)

#65
15905190
2018-11-27

Low-power channel select filter using transresistance amplifier for DVB-H receivers

#66
15875278
2019-04-09

Synthesizer—power amplifier interface in a wireless circuit

#67
15684034
2018-12-25

Differential amplifier with common-mode biasing technique

#68
15660296
2018-10-02

Supply-noise-rejecting current source

#69
15223310
2017-08-08

Flexible signal chain processing circuits and method

#70
14610597
2016-06-21

Level-shifting amplifier

#71
14551324
2016-01-05

Amplifier common-mode control method

#72
14536443
2017-02-07

Circuits and methods for variable gain amplifiers

#73
13834970
2015-01-13

Stacked receivers