ClassID:

220093

H03F2203/45576 - 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 input impedance adapting or controlling means

Recent Application in this class:
#1
20220286095
2022-09-08

Interface circuit including variable impedance circuit and operating method thereof

#2
20220165299
2022-05-26

Data storage device employing amplifier feedback for impedance matching

#3
20200403582
2020-12-24

Matching network and power amplifier circuit

#4
20200358411
2020-11-12

Differential amplifier

#5
20190393915
2019-12-26

Adjustable gain devices and methods for use therewith

#6
20190393912
2019-12-26

Receiver with reduced mixer-filter interaction distortion

#7
20190199298
2019-06-27

Matching network and power amplifier circuit

#8
20190007003
2019-01-03

Radio frequency receiver

#9
20180102745
2018-04-12

Low-noise amplifier and electronic device

#10
20170222604
2017-08-03

Power amplifier circuit

#11
20150214911
2015-07-30

Circuitry and methods for common-mode rejection calibration

#12
20150171811
2015-06-18

Current controlling device and signal converting apparatus applying the current controlling device

#13
20150171806
2015-06-18

Differential amplifying circuit and microphone/amplifier system

#14
20150097619
2015-04-09

Amplifier

#15
20140375386
2014-12-25

Low-noise amplifier circuit

#16
20140354360
2014-12-04

High frequency module and portable terminal using same

#17
20140354358
2014-12-04

POWER AMPLIFIER

#18
20140132341
2014-05-15

Multi-mode OPAMP-based circuit

#19
20140009223
2014-01-09

Common mode bias circuit

#20
20130116577
2013-05-09

Biomedical acquisition system with motion artifact reduction

#21
20130113549
2013-05-09

Variable capacitor circuit and method

#22
20120299632
2012-11-29

SIMULTANEOUS SIGNAL INPUT MATCHING AND LINEARIZATION

#23
20110025418
2011-02-03

Current to voltage converter

#24
20100295614
2010-11-25

Amplifying device

#25
20100219886
2010-09-02

Broadband low noise amplifier

#26
20100219885
2010-09-02

Broadband low noise amplifier

#27
20100134944
2010-06-03

Magnetic coupler device and magnetically coupled isolator

#28
20100045379
2010-02-25

Amplifier and the method thereof

#29
20090167439
2009-07-02

Amplifier and the method thereof

#30
20090153245
2009-06-18

Variable-gain wide-dynamic-range amplifier

#31
20080258731
2008-10-23

High impedance differential input preamplifier and antenna for MRI

#32
20080240739
2008-10-02

Differential circuit with precisely controlled terminator circuit

#33
20080111621
2008-05-15

Amplifier circuit and method for reducing voltage and current noise

#34
20080079494
2008-04-03

Broadband low noise amplifier

#35
20080024222
2008-01-31

Voltage level shifting circuit, a differential input stage circuit, and a method for providing a level shifted differential signal to a differential input buffer circuit

#36
20080018405
2008-01-24

Ultra wide band, differential input/output, high frequency amplifier in an integrated circuit

#37
20070103845
2007-05-10

Circuits and methods for canceling signal dependent capacitance

#38
20070018727
2007-01-25

Variable gain amplifier and wireless communication apparatus including the same

#39
20060234650
2006-10-19

Low voltage differential signaling transceiver

#40
20050189992
2005-09-01

Bipolar differential input stage with input bias current cancellation circuit

#41
16015926
2019-02-19

Fully differential adjustable gain devices and methods for use therewith