ClassID:

219631

H03F2200/405 - CPC Classification

Classification description:

Indexing scheme relating to amplifiers the output amplifying stage of an amplifier comprising more than three power stages

Recent Application in this class:
#1
20200366260
2020-11-19

Method and system for a feedback transimpedance amplifier with sub-40khz low-frequency cutoff

#2
20200036343
2020-01-30

Power amplification apparatus and television signal transmission system

#3
20190379339
2019-12-12

DOHERTY AMPLIFIER

#4
20190319720
2019-10-17

APPARATUS AND METHODS OF CALIBRATING A POWER AMPLIFIER SYSTEM TO COMPENSATE FOR ENVELOPE AMPLITUDE MISALIGNMENT

#5
20190229689
2019-07-25

Method and system for a feedback transimpedence amplifier with sub-40KHZ low-frequency cutoff

#6
20190173439
2019-06-06

Power amplifier circuit

#7
20190140599
2019-05-09

Power amplification apparatus and television signal transmission system

#8
20190132163
2019-05-02

DC offset cancellation and crosspoint control circuit

#9
20190116420
2019-04-18

Amplifier speaker drive current sense

#10
20190081596
2019-03-14

Transmit/receive switching circuit

#11
20190081399
2019-03-14

Configurable power combiner and splitter

#12
20190068147
2019-02-28

Driver circuit and optical transmitter

#13
20190052236
2019-02-14

Variable gain circuit and transimpedance amplifier using the same

#14
20190036487
2019-01-31

Four-way Doherty amplifier and mobile telecommunications base station

#15
20180375544
2018-12-27

RECEIVING DEVICE, TRANSMITTING DEVICE, AND SEMICONDUCTOR DEVICE AND SYSTEM USING THE SAME

#16
20180375543
2018-12-27

BICMOS-based transceiver for millimeter wave frequency applications

#17
20180375478
2018-12-27

CMOS RF front-end of transmitter for rotational spectroscopy

#18
20180351519
2018-12-06

TRANSIMPEDANCE AMPLIFIER WITH BANDWIDTH EXTENDER

#19
20180342997
2018-11-29

Electric transmission cable module and transmission loss compensation circuit

#20
20180342991
2018-11-29

Low wideband noise multi-stage switch-mode power amplifier

#21
20180323756
2018-11-08

Power amplifier circuit with adjustable bias voltage

#22
20180287578
2018-10-04

Control system for a power amplifier

#23
20180287559
2018-10-04

Circuits for wireless communication on multiple frequency bands

#24
20180254750
2018-09-06

Amplifier circuit

#25
20180254749
2018-09-06

Doherty amplifier

#26
20180248520
2018-08-30

Circuit system

#27
20180241352
2018-08-23

Apparatus and method for improving efficiency of power amplifier

#28
20180212571
2018-07-26

Power amplification apparatus and television signal transmission system

#29
20180152149
2018-05-31

Doherty amplifier

#30
20180145650
2018-05-24

Split cascode circuits and related communication receiver architectures

#31
20180138880
2018-05-17

Power amplifier and gain reduction circuit thereof

#32
20180109326
2018-04-19

Optical receiver, active optical cable, and control method for optical receiver

#33
20180102749
2018-04-12

Ultra-broadband transimpedance amplifiers (tia) for optical fiber communications

#34
20180026593
2018-01-25

Doherty amplifier

#35
20180024170
2018-01-25

Signal detector, electronic device, and method for controlling signal detector

#36
20180014119
2018-01-11

Amplifier speaker drive current sense

#37
20170366149
2017-12-21

Radio frequency power amplifier

#38
20170359032
2017-12-14

Doherty amplifiers with minimum phase output networks

#39
20170338783
2017-11-23

Active transformer, corresponding apparatus and method

#40
20170338782
2017-11-23

Method and system for a feedback transimpedance amplifier with sub-40khz low-frequency cutoff

#41
20170272046
2017-09-21

Split cascode circuits and related communication receiver architectures

#42
20170264253
2017-09-14

Power amplifier with input power protection circuits

#43
20170250657
2017-08-31

Amplifier circuit and method

#44
20170237402
2017-08-17

RF amplifier to increase gain using transformer

#45
20170222604
2017-08-03

Power amplifier circuit

#46
20170214368
2017-07-27

Power amplifier circuit and operating method thereof

#47
20170093505
2017-03-30

Methods of calibrating a power amplifier system to compensate for envelope amplitude misalignment

#48
20170093352
2017-03-30

Amplifier circuit and method

#49
20170077878
2017-03-16

Transimpedance amplifier

#50
20170040957
2017-02-09

Power amplifier having stack structure

#51
20170033745
2017-02-02

Amplifier system and device

#52
20170026013
2017-01-26

Multi-stage amplifiers with low loss

#53
20170026011
2017-01-26

Transimpedance amplifier with bandwidth extender

#54
20170026001
2017-01-26

Amplifier assembly

#55
20170005631
2017-01-05

Output control circuit

#56
20160373078
2016-12-22

Method and system for a feedback transimpedance amplifier with sub-40KHZ low-frequency cutoff

#57
20160359460
2016-12-08

Solid state microwave generator and power amplifier

#58
20160323008
2016-11-03

GAAS/SIGE-BICMOS-based transceiver system-in-package for E-band frequency applications

#59
20160285563
2016-09-29

Optical receiver, active optical cable, and control method for optical receiver

#60
20160277045
2016-09-22

Adjusting power amplifier stimuli based on output signals

#61
20160241213
2016-08-18

Power amplifier device and circuits

#62
20160233835
2016-08-11

Multi-band/multi-mode power amplifier with signal path hardware sharing

#63
20160181984
2016-06-23

Quasi-switched, multi-band, high-power amplifier and method

#64
20160126911
2016-05-05

Signal amplifying system, AC signal generating circuit, amplifying gain acquiring method, and AC signal generating method

#65
20160118942
2016-04-28

Predistortion in radio frequency transmitter

#66
20160099742
2016-04-07

Apparatus and methods for calibration of envelope trackers

#67
20160065400
2016-03-03

Adaptive linearizer

#68
20160065141
2016-03-03

Power amplifier

#69
20160056881
2016-02-25

Multi-stage linearizer

#70
20160036400
2016-02-04

Integrated circuit chip for receiver collecting signals from satellites

#71
20160006403
2016-01-07

Multistage amplifier circuit with improved settling time

#72
20160006395
2016-01-07

Buffer amplifier and trans-impedance amplifier including the same

#73
20150372652
2015-12-24

Multistage amplifier

#74
20150357979
2015-12-10

Operational amplifier

#75
20150349724
2015-12-03

Distortion cancellation for dual stage carrier-aggregation (CA) low noise amplifier (LNA) non-linear second order products

#76
20150349723
2015-12-03

Hybrid power amplifier having electrical and thermal conduction path

#77
20150349719
2015-12-03

Doherty power amplifier apparatus

#78
20150349717
2015-12-03

Amplifier circuit with improved accuracy

#79
20150318827
2015-11-05

Power amplifier with envelope injection

#80
20150303878
2015-10-22

Power amplifiers, systems, and methods

#81
20150249437
2015-09-03

Variable gain multistage amplifier and receiver

#82
20150248964
2015-09-03

Transformers and methods for fabricating transformers

#83
20150244328
2015-08-27

PPA linearization

#84
20150236657
2015-08-20

Amplifier circuit

#85
20150236653
2015-08-20

Limiting amplifiers

#86
20150229279
2015-08-13

Transmitter with predistorter

#87
20150200633
2015-07-16

Quick comparison circuit

#88
20150200629
2015-07-16

Guitar amplifier circuitry

#89
20150188502
2015-07-02

Switching amplifier, sound output device, and audio apparatus using the same

#90
20150180428
2015-06-25

Enhanced and versatile N-way doherty power amplifier

#91
20150171804
2015-06-18

Power amplifier having stack structure

#92
20150155834
2015-06-04

Apparatus and methods for calibrating envelope trackers

#93
20150152833
2015-06-04

RF power amplification and distribution systems, plasma ignition systems, and methods of operation therefor

#94
20150084691
2015-03-26

Switching amplifier and transmitter using same

#95
20150054582
2015-02-26

Control system for a power amplifier

#96
20150034806
2015-02-05

Feedback-based trans-impedance amplifier with programmable input impedance

#97
20150015339
2015-01-15

Power amplifier architectures with input power protection circuits

#98
20150003843
2015-01-01

Open-gain trans-impedance amplifier with programmable input impedance

#99
20140312972
2014-10-23

High-frequency amplifier circuit, semiconductor device, and magnetic recording and reproducing device

#100
20140306761
2014-10-16

Power amplifier

#101
20140306757
2014-10-16

Systems and methods for adaptive power amplifier linearization

#102
20140306755
2014-10-16

Low inductance transformer

#103
20140291489
2014-10-02

Method and system for a feedback transimpedance amplifier with sub-40khz low-frequency cutoff

#104
20140232483
2014-08-21

Combiner for an RF power amplifier

#105
20140152391
2014-06-05

Systems and methods for maintaining power amplifier performance

#106
20140132342
2014-05-15

Amplifier circuit and feedback circuit

#107
20140111281
2014-04-24

Low dissipation amplifier

#108
20140085009
2014-03-27

Amplifier inductor sharing for inductive peaking and method therefor

#109
20140070889
2014-03-13

Low-quiescent current headset driver

#110
20140055195
2014-02-27

High efficiency power amplifier architecture for off-peak traffic hours

#111
20140043098
2014-02-13

Mobile device including a power amplifier with selectable voltage supply

#112
20140035674
2014-02-06

Conditionally-stable operational amplifier with tunable wideband buffers

#113
20140028397
2014-01-30

Low voltage multi-stage amplifier

#114
20140015603
2014-01-16

Multi-band/multi-mode power amplifier with signal path hardware sharing

#115
20130293308
2013-11-07

Method and apparatus for power amplifier linearization

#116
20130293305
2013-11-07

Amplifier and filter having cutoff frequency controlled according to digital code

#117
20130271219
2013-10-17

Apparatus and methods for frequency compensation of an amplifier

#118
20130241653
2013-09-19

Instrumentation input systems

#119
20130223652
2013-08-29

Digital input class-D audio amplifier

#120
20130222054
2013-08-29

Low distortion filters

#121
20130194042
2013-08-01

Multi-stage amplifier using tunable transmission lines and frequency response calibration of same

#122
20130154747
2013-06-20

Millimeter wave power amplifier

#123
20130154731
2013-06-20

N way Doherty amplifier

#124
20130141170
2013-06-06

Amplifier inductor sharing for inductive peaking

#125
20130136213
2013-05-30

Reception signal processing device

#126
20130135049
2013-05-30

Incremental gain amplifier

#127
20130121391
2013-05-16

Adaptive offset adjustment algorithm

#128
20130094607
2013-04-18

Transmitter employing pulling mitigation mechanism and related method thereof

#129
20130094606
2013-04-18

Multi-stage digitally-controlled power amplifier

#130
20130094553
2013-04-18

Apparatus and method for calibration of supply modulation in transmitter

#131
20130093510
2013-04-18

High-frequency signal amplifier

#132
20130084906
2013-04-04

Radio frequency amplifier noise reduction system

#133
20130082772
2013-04-04

Digitally-scalable transformer combining power amplifier

#134
20130070870
2013-03-21

Digital pre-distortion filter system and method

#135
20130057341
2013-03-07

Amplifier circuit and feedback circuit

#136
20130043955
2013-02-21

Signal amplification circuits for receiving/transmitting signals according to input signal

#137
20130043950
2013-02-21

Common mode input control for switch capacitor amplifier in pipeline analog-to-digital converter

#138
20130027272
2013-01-31

Doherty amplifier arrangement

#139
20120326787
2012-12-27

VARIABLE-GAIN AMPLIFIER CIRCCUIT AND RECEIVER INCLUDING THE SAME

#140
20120322381
2012-12-20

Wireless communication apparatus

#141
20120319782
2012-12-20

Class E power amplifier

#142
20120314746
2012-12-13

Controlling a transmit path based on monitored error vector magnitude (EVM) performance

#143
20120313704
2012-12-13

Differential amplifier stage with integrated offset cancellation circuit

#144
20120306579
2012-12-06

Power amplifier

#145
20120293263
2012-11-22

Operational amplifier

#146
20120293251
2012-11-22

DOHERTY POWER AMPLIFIER AND IMPLEMENTATION METHOD THEREOF

#147
20120281991
2012-11-08

Optical receiver compensating input offset

#148
20120268213
2012-10-25

High power amplifier

#149
20120268209
2012-10-25

Pulse electric power amplification apparatus

#150
20120249242
2012-10-04

Apparatus and methods for electronic amplification

#151
20120217381
2012-08-30

Variable gain amplifier compensating frequency response thereof

#152
20120206205
2012-08-16

Variable gain amplifier

#153
20120200354
2012-08-09

Apparatus and methods for envelope tracking calibration

#154
20120182167
2012-07-19

Buffer to drive reference voltage

#155
20120169418
2012-07-05

Low dissipation amplifier

#156
20120161891
2012-06-28

OTA-based current-mode filter and oscillator

#157
20120149316
2012-06-14

Radio frequency power amplifier with linearizing predistorter

#158
20120140852
2012-06-07

Wireless communication apparatus

#159
20120139643
2012-06-07

Output stage of a power amplifier having a switched-bulk biasing and adaptive biasing

#160
20120139636
2012-06-07

Power amplifier system with a current bias signal path

#161
20120139635
2012-06-07

Gate-based output power level control power amplifier

#162
20120133435
2012-05-31

Amplification Circuit, Electronic Device, Amplification Method

#163
20120126896
2012-05-24

Offset cancellation for continuous-time circuits

#164
20120121273
2012-05-17

Common base circuit with output compensation, current-to-voltage circuit configured with common base amplifier, and optical receiver implemented with the same

#165
20120119833
2012-05-17

Class AB output stages and amplifiers including class AB output stages

#166
20120086513
2012-04-12

Instrumentation input systems

#167
20120064852
2012-03-15

Low noise amplifier having both ultra-high linearity and low noise characteristic and radio receiver including the same

#168
20120056681
2012-03-08

Signal amplification circuits for receiving/transmitting signals according to input signal

#169
20120019325
2012-01-26

CURRENT-MODE AMPLIFIER

#170
20120019323
2012-01-26

Current-mode amplifier

#171
20120007681
2012-01-12

Method and system for a feedback transimpedance amplifier with sub-40khz low-frequency cutoff

#172
20120007674
2012-01-12

POWER AMPLIFIER REDUCING GAIN MISMATCH

#173
20120007673
2012-01-12

Amplifier with wide gain range

#174
20120001697
2012-01-05

Differential amplifier stage with integrated offset cancellation circuit

#175
20110316628
2011-12-29

Complimentary single-ended-input OTA-C universal filter structures

#176
20110304393
2011-12-15

Class AB output stages and amplifiers including class AB output stages

#177
20110241782
2011-10-06

Power amplifier

#178
20110235689
2011-09-29

Power amplifier and semiconductor integrated circuit

#179
20110230149
2011-09-22

RF power amplifier device and wireless communication terminal device

#180
20110227651
2011-09-22

Programmable gain amplifier and transconductance compensation system

#181
20110204923
2011-08-25

High-speed comparator

#182
20110181363
2011-07-28

Electronic circuit

#183
20110177789
2011-07-21

LOW NOISE AMPLIFIER AND THE USES THEREOF

#184
20110169568
2011-07-14

Operational amplifier

#185
20110156812
2011-06-30

Multi-band, multi-mode RF transmit amplifier system with separate signal paths for linear and saturated operation

#186
20110128076
2011-06-02

Managing power supply transients

#187
20110121899
2011-05-26

Power amplifier, non-linear distortion correcting method of power amplifier and radio communication device

#188
20110095823
2011-04-28

Incremental gain amplifier

#189
20110081879
2011-04-07

Amplifier circuit and communication device

#190
20110070848
2011-03-24

Dynamic stability, gain, efficiency and impedance control in a linear/non-linear CMOS power amplifier

#191
20110063036
2011-03-17

Operational amplifier

#192
20110057922
2011-03-10

DRIVE DEVICE AND DISPLAY DEVICE

#193
20110006846
2011-01-13

HIGH-FREQUENCY AMPLIFIER

#194
20100327940
2010-12-30

Embedded phase noise measurement system

#195
20100315167
2010-12-16

Inter-stage matching network to enhance common mode stability

#196
20100308915
2010-12-09

Phase margin modification in operational transconductance amplifiers

#197
20100253426
2010-10-07

High-efficiency power amplifier

#198
20100246659
2010-09-30

Global instruction broadcasting for pulse-position modulated data transmission

#199
20100237948
2010-09-23

System and method for dynamic drain voltage adjustment to control linearity, output power, and efficiency in RF power amplifiers

#200
20100214024
2010-08-26

Low dissipation amplifier

#201
20100214019
2010-08-26

Low power integrated circuit

#202
20100158539
2010-06-24

Amplification circuit, differential amplification circuit, and optical transmitter

#203
20100158166
2010-06-24

Noise injection circuit and method for signal processing

#204
20100156683
2010-06-24

Amplifier circuit and A/D converter

#205
20100135442
2010-06-03

Adaptive offset adjustment algorithm

#206
20100117734
2010-05-13

Programmable gain amplifier and transconductance compensation system

#207
20100013557
2010-01-21

Current-controlled CMOS (C3MOS) fully differential integrated wideband amplifier/equalizer with adjustable gain and frequency response without additional power or loading

#208
20100007419
2010-01-14

Instrumentation input systems

#209
20090322421
2009-12-31

Power efficient transmitter with high dynamic range

#210
20090289714
2009-11-26

Operational amplifier

#211
20090278601
2009-11-12

Preamplifier and method for calibrating offsets therein

#212
20090273395
2009-11-05

Preamplifier and method for calibrating offset voltages therein

#213
20090270137
2009-10-29

Radio frequency communications circuitry with power supply voltage and gain control

#214
20090237156
2009-09-24

Power amplifiers having improved startup linearization and related operating methods

#215
20090231033
2009-09-17

Amplifier circuit

#216
20090212983
2009-08-27

Integrated circuit device and electronic instrument

#217
20090108933
2009-04-30

Compensation for amplifiers driving a capacitive load

#218
20090108929
2009-04-30

Apparatuses and methods for providing offset compensation for operational amplifier

#219
20090096533
2009-04-16

Adaptively tuned RF power amplifier

#220
20090033422
2009-02-05

Multi-level slew and swing control buffer

#221
20080252546
2008-10-16

Ultra wideband impulse radar

#222
20080211583
2008-09-04

System and method for dynamic drain voltage adjustment to control linearity, output power, and efficiency in RF power amplifiers

#223
20080174372
2008-07-24

Multi-stage amplifier with multiple sets of fixed and variable voltage rails

#224
20080136513
2008-06-12

Power-efficient automatic gain control

#225
20080125061
2008-05-29

RF power amplifying device and wireless communication terminal device

#226
20080094137
2008-04-24

Power control and modulation of switched-mode power amplifiers with one or more stages

#227
20080054391
2008-03-06

Monolithic silicon-based photonic receiver

#228
20080024226
2008-01-31

Inverting amplifier

#229
20070063765
2007-03-22

Power control and modulation of switched-mode power amplifiers with one or more stages

#230
20070025435
2007-02-01

Current-controlled CMOS (C3MOS) fully differential integrated wideband amplifier/equalizer with adjustable gain and frequency response without additional power or loading

#231
20070008035
2007-01-11

Wide-band high-gain limiting amplifier with parallel resistor-transistor source loads

#232
20060244523
2006-11-02

Power control and modulation of switched-mode power amplifiers with one or more stages

#233
20060152280
2006-07-13

Systems, methods and devices for differential active bias of multi-stage amplifiers

#234
20050127992
2005-06-16

Power control and modulation of switched-mode power amplifiers with one or more stages

#235
20050104656
2005-05-19

Power amplifier with pulse differentiating circuit

#236
15916887
2019-05-14

Programmable buffering, bandwidth extension and pre-emphasis of a track-and-hold circuit using series inductance