ClassID:

219429

H03F3/45484 - 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 bipolar transistors as the active amplifying circuit

Sub-classes:
Recent Application in this class:
#1
20260074657
2026-03-12

SEMICONDUCTOR CIRCUIT FOR REDUCING OUTPUT DISTORTION

#2
20240429886
2024-12-26

PUSH-PULL RF POWER AMPLIFIER CIRCUIT AND PUSH-PULL RF POWER AMPLIFIER

#3
20230040489
2023-02-09

Variable gain amplifier with temperature compensated gain

#4
20210313942
2021-10-07

Push-pull output driver and operational amplifier using same

#5
20200274499
2020-08-27

Power amplifier system

#6
20200162043
2020-05-21

Push-pull output driver and operational amplifier using same

#7
20180342987
2018-11-29

Integrated circuit device

#8
20180069515
2018-03-08

Semiconductor device, display module, and electronic device

#9
20150002223
2015-01-01

Bias circuit

#10
20130181771
2013-07-18

LIGHT RECEIVING CIRCUIT AND PHOTO-COUPLING TYPE INSULATED CIRCUIT

#11
20130057344
2013-03-07

DIFFERENTIAL RF AMPLIFIER

#12
20130049869
2013-02-28

Temperature compensated feedforward linearizer

#13
20110109388
2011-05-12

Differential RF amplifier

#14
20100007418
2010-01-14

Input system for a variable gain amplifier having class-AB transconductance stages

#15
20090302948
2009-12-10

Post amplifier with selectable gain

#16
20090102560
2009-04-23

Slew-enhanced input stages and amplifiers

#17
20090058522
2009-03-05

Differential amplifier

#18
20080309409
2008-12-18

Balanced differential cross-coupled transconductance amplifier for a multiplexor

#19
20070290757
2007-12-20

Input system for a variable gain amplifier having class-AB transconductance stages

#20
20070241793
2007-10-18

Current feedback amplifiers

#21
20070176679
2007-08-02

Differential amplifier and radio system with a differential amplifier

#22
20070052450
2007-03-08

Current feedback amplifiers

#23
20070024262
2007-02-01

Integrated circuit apparatus and method of compensating a current

#24
20060238254
2006-10-26

Input system for a variable gain amplifier having class-AB transconductance stages

#25
20050206452
2005-09-22

Differential-mode current feedback amplifiers

#26
20050206450
2005-09-22

AC differential amplifier with reduced low corner frequency

#27
20050200414
2005-09-15

Apparatus and method for compensating operating current in an amplifier when supply voltage varies

#28
20050057304
2005-03-17

Single-ended input, differential output low noise amplifier