ClassID:

219341

H03F3/45089 - 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; Long tailed pairs Non-folded cascode stages

Recent Application in this class:
#1
20260142623
2026-05-21

HIGH PEAKING FREQUENCY DIFFERENTIAL CASCODE TRANSFORMER AMPLIFIER

#2
20230275550
2023-08-31

Biased amplifier

#3
20230268895
2023-08-24

AMPLIFIER CIRCUIT

#4
20230179218
2023-06-08

Analog signal analog-to-digital converter

#5
20230179210
2023-06-08

Analog signal time gain amplifier

#6
20210409246
2021-12-30

Enhanced discrete-time feedforward equalizer

#7
20210288624
2021-09-16

Biased amplifier

#8
20210044262
2021-02-11

Power amplifier circuit

#9
20200235711
2020-07-23

Integrated amplifier devices and methods of use thereof

#10
20200204129
2020-06-25

Biased amplifier

#11
20200204127
2020-06-25

Gain-control stage for a variable gain amplifier

#12
20200204126
2020-06-25

Amplifier with dual current mirrors

#13
20200153112
2020-05-14

Front-end chip for dual-pole antenna array

#14
20200014344
2020-01-09

Power amplifier circuit

#15
20190386622
2019-12-19

Differential amplifier including cancellation capacitors

#16
20190372236
2019-12-05

Distributed transceiver signal switching circuit

#17
20190334490
2019-10-31

Differential amplifier including cancellation capacitors

#18
20190312558
2019-10-10

AMPLIFIER CIRCUIT AND OPTICAL TRANSCEIVER

#19
20190305737
2019-10-03

Audio amplifier, audio output device including the same, and electronic apparatus

#20
20190273470
2019-09-05

CURRENT CONTROL USING POWER CELL ISOLATION

#21
20190190472
2019-06-20

Slew boost disable for an operational amplifier

#22
20190190471
2019-06-20

Slew boost disable for an operational amplifier

#23
20190173442
2019-06-06

Integrated amplifier devices and methods of use thereof

#24
20190115885
2019-04-18

Biased amplifier

#25
20190089401
2019-03-21

Distributed transceiver signal switching circuit

#26
20190089400
2019-03-21

Method to build asymmetrical transmit/receive switch with 90 degrees impedance transformation section

#27
20190089399
2019-03-21

Fast memory access control for phase and gain

#28
20190089308
2019-03-21

Wideband vector modulator and phase shifter

#29
20190089064
2019-03-21

Symmetrical front-end chip for dual-pole antenna array

#30
20190089048
2019-03-21

Radio-frequency signal shielding and channel isolation

#31
20190028075
2019-01-24

Semiconductor integrated circuit

#32
20180210239
2018-07-26

Driving circuit for optical modulator

#33
20180198431
2018-07-12

Variable gain amplifier

#34
20180123536
2018-05-03

Baseband amplifier circuit

#35
20180062580
2018-03-01

Output power cell for cascode amplifiers

#36
20170117863
2017-04-27

Variable gain amplifier and driver implementing the same

#37
20160285427
2016-09-29

Differential amplifier

#38
20160248378
2016-08-25

Apparatus and methods for multi-mode low noise amplifiers

#39
20160087727
2016-03-24

Optical modulator driver circuit and optical transmitter

#40
20160070123
2016-03-10

Optical modulator driver

#41
20150381128
2015-12-31

Hybrid translinear amplifier

#42
20150372649
2015-12-24

Signal amplification system

#43
20140333374
2014-11-13

Traveling wave amplifier providing cascade units each including a dynamic cascade transistor whose collector output is fed back to its base input

#44
20140097896
2014-04-10

Offset current trim circuit

#45
20130241653
2013-09-19

Instrumentation input systems

#46
20130049869
2013-02-28

Temperature compensated feedforward linearizer

#47
20120262235
2012-10-18

Differential output stage

#48
20120249232
2012-10-04

Traveling wave amplifier with pre-emphasis function

#49
20120217381
2012-08-30

Variable gain amplifier compensating frequency response thereof

#50
20120112835
2012-05-10

Transformer coupled distributed amplifier

#51
20120086513
2012-04-12

Instrumentation input systems

#52
20120060135
2012-03-08

Integrated circuit transformer devices for on-chip millimeter-wave applications

#53
20110294446
2011-12-01

Gyrator circuit, wide-band amplifier and radio communication apparatus

#54
20110241777
2011-10-06

Conversion circuit from single phase signal to differential phase signal

#55
20110234322
2011-09-29

Apparatus and method for reducing current noise

#56
20110101256
2011-05-05

Output circuit, light-receiver circuit using the same, and photocoupler

#57
20100289583
2010-11-18

Variable gain RF amplifier

#58
20100289028
2010-11-18

Display device

#59
20100289027
2010-11-18

Electronic device, constituted by using thin-film transistors

#60
20100237940
2010-09-23

Output stage with adaptive bias control

#61
20100007419
2010-01-14

Instrumentation input systems

#62
20090302964
2009-12-10

Circulator type monolithic device

#63
20090261903
2009-10-22

VARIABLE GAIN RF AMPLIFIER

#64
20090243718
2009-10-01

High-speed modulator driver circuit with enhanced drive capability

#65
20090243717
2009-10-01

Compact high-speed modulator driver method and apparatus

#66
20090201052
2009-08-13

Low voltage, high-speed output-stage for laser or modulator driving

#67
20090195312
2009-08-06

Differential amplifier

#68
20090153245
2009-06-18

Variable-gain wide-dynamic-range amplifier

#69
20090140809
2009-06-04

High performance variable gain amplifier, method of use and design structure

#70
20090115515
2009-05-07

Receiver comprising an amplifier

#71
20090108937
2009-04-30

Low noise amplifier and differential amplifier

#72
20090058522
2009-03-05

Differential amplifier

#73
20090009249
2009-01-08

Input stage

#74
20080297261
2008-12-04

Circuits and methods for implementing transformer-coupled amplifiers at millimeter wave frequencies

#75
20080297255
2008-12-04

Receiver comprising an amplifier

#76
20080258818
2008-10-23

Amplifier with programmable input impedance

#77
20080195988
2008-08-14

Integrated circuit transformer devices for on-chip millimeter-wave applications

#78
20080074188
2008-03-27

Output differential stage

#79
20080061877
2008-03-13

Common mode regulation for thermal tail compensation

#80
20080042152
2008-02-21

Electronic device, display device, interface circuit and differential amplification device, which are constituted by using thin-film transistors

#81
20080030280
2008-02-07

Circuits and methods for implementing transformer-coupled amplifiers at millimeter wave frequencies

#82
20080001664
2008-01-03

Compound automatic gain control

#83
20070229163
2007-10-04

Plop noise avoidance for an amplifier

#84
20070188238
2007-08-16

Single-ended input to differential-ended output low noise amplifier implemented with cascode and cascade topology

#85
20070152722
2007-07-05

Comparator, sample-and-hold circuit, differential amplifier, two-stage amplifier, and analog-to-digital converter

#86
20070146078
2007-06-28

Selective amplifier

#87
20070146070
2007-06-28

Differential cascode amplifier

#88
20070132511
2007-06-14

Amplifier and amplifier gain adjustment circuitry using current steering, and multimode communication device containing same

#89
20070115056
2007-05-24

Operational amplifier and scanning electron microscope using the same

#90
20070082640
2007-04-12

Signal generation apparatus, frequency converting apparatus, and receiver

#91
20060250184
2006-11-09

SiGe differential cascode amplifier with miller effect resonator

#92
20060232342
2006-10-19

Circuits and methods for implementing transformer-coupled amplifiers at millimeter wave frequencies

#93
20060226510
2006-10-12

Integrated circuit transformer devices for on-chip millimeter-wave applications

#94
20060170500
2006-08-03

Variable inductor, oscillator including the variable inductor and radio terminal comprising this oscillator, and amplifier including the variable inductor and radio terminal comprising this amplifier

#95
20060170494
2006-08-03

Cross-talk reduction circuit and method therefor

#96
20060164172
2006-07-27

Radiofrequency amplifier device, in particular for cellular mobile telephone

#97
20060125564
2006-06-15

Method of forming a wide bandwidth differential amplifier and structure therefor

#98
20060097787
2006-05-11

Gain adjusting and circuit arrangement

#99
20060087328
2006-04-27

Amplitude varying driver circuit and test apparatus

#100
20060066362
2006-03-30

Voltage-current conversion circuit, amplifier, mixer circuit, and mobile appliance using the circuit

#101
20060044662
2006-03-02

Method to vary symmetry and coupling in symmetrical write drivers for disk driver preamplifiers

#102
20060033584
2006-02-16

Variable inductor, oscillator including the variable inductor and radio terminal comprising this oscillator, and amplifier including the variable inductor and radio terminal comprising this amplifier

#103
20060028301
2006-02-09

Discrete inductor bank and LC filter

#104
20060028273
2006-02-09

Gain-boosted opamp with capacitor bridge connection

#105
20060001486
2006-01-05

Bias circuit for high frequency amplifiers

#106
20050264376
2005-12-01

Methods and apparatus for an improved discrete LC filter

#107
20050212383
2005-09-29

Balanced high-frequency device and balanced high-frequency circuit using the same

#108
20050189992
2005-09-01

Bipolar differential input stage with input bias current cancellation circuit

#109
20050174168
2005-08-11

Differential preamplifier having balanced resistor network

#110
20050140440
2005-06-30

Electronic amplifier circuit

#111
20050134390
2005-06-23

Bias circuit for high frequency amplifiers

#112
20050110555
2005-05-26

Amplifier and frequency converter

#113
20050062540
2005-03-24

Amplifier and frequency converter

#114
20050035821
2005-02-17

High speed, high resolution amplifier topology

#115
20050030121
2005-02-10

Variable attenuation system having continuous input steering

#116
20050012565
2005-01-20

Methods and apparatus for an improved discrete LC filter

#117
20050012553
2005-01-20

Variable gain low noise amplifier and method