H03F3/45098 - CPC Classification Index

ClassID:

219343 ⎘

H03F3/45098 - CPC Classification

Classification description:

Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements; Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using bipolar transistors as the active amplifying circuit PI types

Sub-classes:

H03F3/45103 » {Non-folded cascode stages} 17
H03F3/45107 » {Folded cascode stages} 2

Recent Application in this class:

20240405737

2024-12-05

WIDE-BAND LOGARITHMIC POWER DETECTORS

20220263479

2022-08-18

High gain-bandwidth product (GBW) amplifier with passive feedforward compensation

20200209977

2020-07-02

Programmable filter in an amplifier

20190173437

2019-06-06

Programmable filter in an amplifier

20190068146

2019-02-28

Integration-based low noise amplifiers for sensors

20180198421

2018-07-12

Circuit with voltage drop element

20180083580

2018-03-22

Programmable filter in an amplifier

20170207761

2017-07-20

Low noise amplifier circuit

20150381115

2015-12-31

Emphasis circuit

#10

20150326198

2015-11-12

Low-voltage analog variable gain amplifier with enhanced linearity

#11

20140203872

2014-07-24

Low-noise amplifier, receiver, method and computer program

#12

20140010385

2014-01-09

Differential amplifier

#13

20130215954

2013-08-22

Analog signal current integrators with tunable peaking function

#14

20130135040

2013-05-30

Highly linear, low-power, transconductor

#15

20120326787

2012-12-27

VARIABLE-GAIN AMPLIFIER CIRCCUIT AND RECEIVER INCLUDING THE SAME

#16

20120293263

2012-11-22

Operational amplifier

#17

20120268206

2012-10-25

Negative capacitance synthesis for use with differential circuits

#18

20120242408

2012-09-27

Low noise variable gain amplifier utilizing variable feedback techniques with constant input/output impedance

#19

20120235744

2012-09-20

Driving method for obtaining a gain linear variation of a transconductance amplifier and corresponding driving circuit

#20

20120139634

2012-06-07

Circuitry including matched transistor pairs

#21

20120075021

2012-03-29

Wideband low noise sensor amplifier circuit

#22

20120018622

2012-01-26

Differential amplifier with function of variable gain and optical receiver implemented with the same

#23

20110169568

2011-07-14

Operational amplifier

#24

20110096240

2011-04-28

High dynamic range low-power differential input stage

#25

20110084763

2011-04-14

Db-linear process-independent variable gain amplifier

#26

20100301940

2010-12-02

Negative capacitance synthesis for use with differential circuits

#27

20100291890

2010-11-18

Receiver

#28

20100283543

2010-11-11

Variable gain amplifier

#29

20100283542

2010-11-11

Linear transimpedance amplifier with wide dynamic range for high rate applications

#30

20100225394

2010-09-09

High bandwidth, rail-to-rail differential amplifier with input stage transconductance amplifier

#31

20100225393

2010-09-09

High bandwidth, rail-to-rail differential amplifier with intermediate stage current amplifier

#32

20100225392

2010-09-09

High bandwidth, rail-to-rail differential amplifier with output stage amplifier

#33

20100225389

2010-09-09

High efficiency RF system linearizer using controlled complex nonlinear distortion generators

#34

20100093303

2010-04-15

CIRCUIT CURRENT GENERATION APPARATUS AND METHOD THEREOF, AND SIGNAL PROCESSING APPARATUS

#35

20100007418

2010-01-14

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

#36

20090322428

2009-12-31

Tunable linear operational transconductance amplifier

#37

20090302948

2009-12-10

Post amplifier with selectable gain

#38

20090289714

2009-11-26

Operational amplifier

#39

20090212865

2009-08-27

Differential audio amplifier

#40

20090153245

2009-06-18

Variable-gain wide-dynamic-range amplifier

#41

20090072908

2009-03-19

Gain control circuit and optical recording and reproducing device using thereof

#42

20090072904

2009-03-19

Variable gain amplifier having dual gain control

#43

20090072903

2009-03-19

Variable gain amplifier having variable gain DC offset loop

#44

20090027563

2009-01-29

LOW NOISE AMPLIFIER

#45

20080230683

2008-09-25

Optical receiving circuit

#46

20080068081

2008-03-20

High-voltage operational amplifier input stage and method

#47

20080024212

2008-01-31

Amplifier circuit

#48

20070290757

2007-12-20

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

#49

20070194847

2007-08-23

Operational amplifier

#50

20070188191

2007-08-16

Differential amplifier with over-voltage protection and method

#51

20070182488

2007-08-09

Differential amplifying system

#52

20070158782

2007-07-12

Inductor device for multiband radio frequency operation

#53

20070032215

2007-02-08

Circuit current generation apparatus and method thereof, and signal processing apparatus

#54

20060293004

2006-12-28

Semiconductor integrated circuit device and wireless communication system

#55

20060238254

2006-10-26

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

#56

20060164149

2006-07-27

Mixer stage and method for mixing two signals having different frequencies

#57

20060125562

2006-06-15

Variable gain amplifiers systems and methods

#58

20060091947

2006-05-04

Amplifier circuit

#59

20060072232

2006-04-06

Composite output stage for hard disk drive preamplifier

#60

20060028276

2006-02-09

CMOS-configured transconductance amplifier circuit

#61

20050258885

2005-11-24

DC offset cancellation circuit, differential amplification circuit with DC offset cancellation circuit, photo-electric pulse conversion circuit, pulse shaping circuit, and pulse generation circuit

#62