ClassID:

220081

H03F2203/45552 - 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 IC comprising clamping means, e.g. diodes

Recent Application in this class:
#1
20210058047
2021-02-25

Isolation amplification circuit with improved common mode rejection

#2
20190140655
2019-05-09

Multiplying digital-to-analog conversion circuit

#3
20170207761
2017-07-20

Low noise amplifier circuit

#4
20150365059
2015-12-17

Class-D amplifier and electronic apparatus

#5
20150137888
2015-05-21

Input clamping structure for sound quality improvement in car-radio class-AB power amplifier design

#6
20150115928
2015-04-30

Input circuit includes a constant current circuit

#7
20150097619
2015-04-09

Amplifier

#8
20130300503
2013-11-14

Programmable-gain amplifier

#9
20130169362
2013-07-04

Input clamping structure for sound quality improvement in car-radio class-AB power amplifier design

#10
20120121106
2012-05-17

Distortion suppression in high-level capable audio amplification circuit

#11
20120039487
2012-02-16

First stage audio amplifier with clamping circuit

#12
20110029109
2011-02-03

Audio signal controller

#13
20110026739
2011-02-03

High level capable audio amplification circuit

#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
20090027041
2009-01-29

Buffer circuit, amplifier circuit, and test apparatus

#17
20070290757
2007-12-20

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

#18
20070229157
2007-10-04

Circuit having enhanced input signal range

#19
20070176645
2007-08-02

Active current cancellation for high performance video clamps

#20
20060238254
2006-10-26

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

#21
20060017504
2006-01-26

Clamping circuit for operational amplifiers

#22
20050057304
2005-03-17

Single-ended input, differential output low noise amplifier