ClassID:

219832

H03F2203/45054 - 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 cascode stage of the cascode dif amp being a current mirror

Recent Application in this class:
#1
20250373216
2025-12-04

TRANSCONDUCTANCE AMPLIFIER, CONTROLLER CIRCUIT, AND DC/DC CONVERTER INCLUDING CONTROLLER CIRCUIT

#2
20250293651
2025-09-18

METHODS AND APPARATUS TO OPERATE A BUFFER STAGE IN AMPLIFIER CIRCUITRY

#3
20200358411
2020-11-12

Differential amplifier

#4
20200343869
2020-10-29

Transconductance boosted cascode compensation for amplifier

#5
20200204126
2020-06-25

Amplifier with dual current mirrors

#6
20190288654
2019-09-19

Amplifier with hysteresis

#7
20170373653
2017-12-28

Current-bootstrap comparator and operational amplifier thereof

#8
20170230005
2017-08-10

Ultra-low working voltage rail-to-rail operational amplifier, and differential input amplification-stage circuit and output-stage circuit thereof

#9
20150270811
2015-09-24

Operational amplifier and driving circuit

#10
20140361836
2014-12-11

Current amplifier and transmitter using the same

#11
20140292411
2014-10-02

High performance class AB operational amplifier

#12
20130088298
2013-04-11

High performance class AB operational amplifier

#13
20130040586
2013-02-14

System and method for improving power efficiency of a transmitter

#14
20100301939
2010-12-02

High frequency receiver preamplifier with CMOS rail-to-rail capability

#15
20070194851
2007-08-23

Apparatus and method for affecting operation of a signal treating device

#16
20070194849
2007-08-23

Method for nullifying temperature dependence and circuit therefor

#17
20060119429
2006-06-08

High frequency receiver preamplifier with CMOS rail-to-rail capability

#18
16925590
2021-11-23

Power amplifier having a spread of graded outputs

#19
15213718
2018-07-03

Frequency enhanced active transistor