H03F2203/7231 - CPC Classification Index

ClassID:

220198 ⎘

H03F2203/7231 - 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 gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal the gated amplifier being switched on or off by putting into cascade or not, by choosing between amplifiers by one or more switch(es)

Recent Application in this class:

20230122151

2023-04-20

CALIBRATION OF FULLY-DIFFERENTIAL INPUT SYSTEM

20210408990

2021-12-30

Amplifier circuit structure and method for controlling circuit

20190273523

2019-09-05

FILTERING TECHNIQUES

20180062682

2018-03-01

Filtering architectures and methods for wireless applications

20180062595

2018-03-01

Semiconductor device with improved variable gain amplification

20170105184

2017-04-13

Wireless communication device and method of operating the same

20160192295

2016-06-30

Apparatus and method for controlling power in a communication system

20130328708

2013-12-12

Method and system for flash type analog to digital converter

20130241659

2013-09-19

Power amplifier

#10

20130136213

2013-05-30

Reception signal processing device

#11

20120293251

2012-11-22

DOHERTY POWER AMPLIFIER AND IMPLEMENTATION METHOD THEREOF

#12

20120269365

2012-10-25

ACOUSTIC APPARATUS, ACOUSTIC SYSTEM, AND AUDIO SIGNAL CONTROL METHOD

#13

20120212295

2012-08-23

Power Amplifier Apparatus, and Receiving Apparatus of a User Equipment

#14

20120139644

2012-06-07

Dual use transistor

#15

20120133435

2012-05-31

Amplification Circuit, Electronic Device, Amplification Method

#16

20120119930

2012-05-17

Background calibration method for fixed gain amplifiers

#17

20120056677

2012-03-08

Apparatus and method for a tunable multi-mode multi-band power amplifier module

#18

20110260794

2011-10-27

High frequency power amplifier

#19

20100289570

2010-11-18

Amplifier circuit, electronic device, method for configuring an amplifier circuit

#20

20100231577

2010-09-16

OUTPUT VOLTAGE AMPLIFIER AND DRIVING DEVICE OF LIQUID CRYSTAL DISPLAY USING THE SAME

#21

20100128898

2010-05-27

METHOD AND APPARATUS FOR OPERATION SEQUENCING OF AUDIO AMPLIFIERS

#22

20090315621

2009-12-24

Amplifier with gain expansion stage

#23

20090267692

2009-10-29

Digitally variable gain amplifier using multiplexed gain blocks

#24

20090257527

2009-10-15

Transmission circuit, transmission method, and use

#25

20090115463

2009-05-07

Buffer circuit with reduced power consumption

#26

20090108935

2009-04-30

Variable gain amplifier including series-coupled cascode amplifiers

#27

20090045874

2009-02-19

Differential amplifier and input circuit using the same

#28

20080218270

2008-09-11

Multi-mode power amplifier with low gain variation over temperature

#29

20080136513

2008-06-12

Power-efficient automatic gain control

#30

20080129384

2008-06-05

Variable gain amplifier circuit

#31

20080116976

2008-05-22

Low noise amplifier with multiple inputs and multiple outputs

#32

20080030276

2008-02-07

Multi-mode power amplifier with high efficiency under backoff operation

#33

20070262817

2007-11-15

Dynamic LNA switch points based on channel conditions

#34

20070257999

2007-11-08

Variable-gain amplifier circuit and method of changing gain amplifier path

#35

20070028280

2007-02-01

Distributed Gain Subscriber Tap with Power Management

#36

20060220736

2006-10-05

Low noise amplifier and differential amplifier with variable gain mode

#37

20060182265

2006-08-17

Multi-stage amplifiers to reduce pop noise

#38

20050122165

2005-06-09

High efficiency power amplifier with multiple power modes

#39

20050068101

2005-03-31

High efficiency power amplifier with multiple power modes