ClassID:

219955

H03F2203/45301 - 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 there are multiple cascaded folded or not folded common gate stages of a cascode dif amp

Recent Application in this class:
#1
20190149094
2019-05-16

Power amplifiers isolated by differential ground

#2
20190068145
2019-02-28

Signal amplifier, signal receiving circuit including the same, and device including the same

#3
20180076770
2018-03-15

Power amplifier systems with differential ground

#4
20160365859
2016-12-15

Wideband highly-linear low output impedance D2S buffer circuit

#5
20160006395
2016-01-07

Buffer amplifier and trans-impedance amplifier including the same

#6
20150381172
2015-12-31

Driver circuit

#7
20150355653
2015-12-10

Linear voltage regulator utilizing a large range of bypass-capacitance

#8
20150256138
2015-09-10

Fully differential class A/AB amplifier and method thereof

#9
20140197888
2014-07-17

Hybrid amplifier

#10
20140035669
2014-02-06

Differential stacked output stage for power amplifiers

#11
20130300506
2013-11-14

Accurate bias tracking for process variation and supply modulation

#12
20130241653
2013-09-19

Instrumentation input systems

#13
20120274403
2012-11-01

Amplifier with integrated filter

#14
20120268205
2012-10-25

RF power amplifiers with improved efficiency and output power

#15
20120220255
2012-08-30

Low noise amplifier (LNA) suitable for use in different transmission environments and receiver using such an LNA

#16
20120161876
2012-06-28

Accurate bias tracking for process variation and supply modulation

#17
20120086513
2012-04-12

Instrumentation input systems

#18
20110028089
2011-02-03

Amplifying circuit, semiconductor integrated circuit, wireless transmission system, and communication apparatus

#19
20100007419
2010-01-14

Instrumentation input systems

#20
20090079608
2009-03-26

Operational amplifier and operating method thereof

#21
20090039959
2009-02-12

Differential amplifier, method for amplifying signals of differential amplifier, and display driving device having differential amplifier

#22
20080272849
2008-11-06

Active baluns

#23
20080204148
2008-08-28

Amplifier with integrated filter

#24
20080018510
2008-01-24

Operational amplifier and operating method thereof

#25
20070024368
2007-02-01

Differential amplifiers with enhanced gain and dynamic range

#26
20050134379
2005-06-23

Multi-port cross-connected multi-level cascode differential amplifier