ClassID:

219655

H03F2200/471 - CPC Classification

Classification description:

Indexing scheme relating to amplifiers the voltage being sensed

Recent Application in this class:
#1
20260160830
2026-06-11

CIRCUIT FOR DETECTING SHORT CIRCUITS IN FULL-BRIDGE CLASS-D AMPLIFIERS AND CORRESPONDING METHOD

#2
20260156408
2026-06-04

HEADROOM PREDICTION FOR AN AUDIO AMPLIFIER

#3
20260135529
2026-05-14

VOLTAGE MONITORING OF DRIVER CIRCUITS

#4
20260088771
2026-03-26

Adaptive Biasing for Multipath Radio-Frequency Amplifiers

#5
20260081566
2026-03-19

BOOST DROOP CATCHER

#6
20260066850
2026-03-05

AMPLIFIER CIRCUIT AND METHOD FOR STABILIZING BIAS CURRENT OF AN AMPLIFIER CIRCUIT

#7
20260005658
2026-01-01

SWITCHING AMPLIFIER CIRCUITRY

#8
20250373209
2025-12-04

Measuring Power for Amplifier Circuitry

#9
20250350248
2025-11-13

POWER AMPLIFIER WITH CLAMP AND FEEDBACK PROTECTION CIRCUITRY

#10
20250306617
2025-10-02

VOLTAGE REGULATOR

#11
20250300603
2025-09-25

POWER AMPLIFIER

#12
20250286519
2025-09-11

PROTECTION LOOP FOR POWER AMPLIFIER

#13
20250279795
2025-09-04

SUPPLY VOLTAGE BASED ANALOG PREDISTORTION (APD) CIRCUIT FOR POWER AMPLIFIER

#14
20250141408
2025-05-01

REDUCTION OF CLICK AND POP NOISE IN AN AMPLIFIER

#15
20250119101
2025-04-10

BOOSTER STAGE CIRCUIT FOR POWER AMPLIFIER

#16
20250088149
2025-03-13

Radio-frequency Amplifier with Reliability Protection

#17
20250048040
2025-02-06

HEARING DEVICE COMPRISING AN AMPLIFIER SYSTEM FOR MINIMIZING VARIATION IN AN ACOUSTICAL SIGNAL CAUSED BY VARIATION IN GAIN OF AN AMPLIFIER

#18
20250038712
2025-01-30

LOAD DRIVE CIRCUIT CAPABLE OF STOPPING OPERATING UPON OCCURRENCE OF ABNORMALITY, AND METHOD OF CONTROLLING LOAD DRIVE CIRCUIT

#19
20240356492
2024-10-24

METHODS TO REDUCE MEASURE CURRENT SETTLING TIME IN SMU

#20
20240223142
2024-07-04

THRESHOLD VOLTAGE SENSOR AND A CHIP USING THE THRESHOLD VOLTAGE SENSOR

#21
20240195392
2024-06-13

BASELINE RESTORER CIRCUIT

#22
20240120896
2024-04-11

DIFFERENTIAL AMPLIFIER CIRCUIT

#23
20240113673
2024-04-04

OUTPUT CLAMP AND CURRENT LIMITER FOR AMPLIFIER

#24
20240056039
2024-02-15

SWITCHING AMPLIFIER CIRCUITRY

#25
20240014790
2024-01-11

Signal line sense amplifying circuit and integrated circuit capable of calibrating driving strength of MOS transistors

#26
20240007057
2024-01-04

PROTECTION CIRCUIT AND METHOD FOR POWER AMPLIFIER

#27
20230412130
2023-12-21

Front-end circuitry with amplifier protection

#28
20230308063
2023-09-28

Output clamp and current limiter for amplifier

#29
20230283968
2023-09-07

Hearing device comprising an amplifier system for minimizing variation in an acoustical signal caused by variation in gain of an amplifier

#30
20230261620
2023-08-17

Switching amplifier with adaptive supply-voltage scaling

#31
20230253930
2023-08-10

POWER AMPLIFIER WITH CLAMP AND FEEDBACK PROTECTION CIRCUITRY

#32
20230094883
2023-03-30

Power amplifier with protection loop

#33
20220416724
2022-12-29

Booster stage circuit for power amplifier

#34
20220408181
2022-12-22

Methods and systems for managing mixed mode electromechanical actuator drive

#35
20220302890
2022-09-22

Amplification interface, and corresponding measurement system and method for operating an amplification interface

#36
20220247359
2022-08-04

Analog bias control of RF amplifiers

#37
20220181134
2022-06-09

Amplifier

#38
20220006427
2022-01-06

Amplifier circuit and amplifier device

#39
20210359647
2021-11-18

Operational amplifier with indirect current feedback current limiter

#40
20210351765
2021-11-11

Electronically tuned RF termination

#41
20210344309
2021-11-04

Common-mode insensitive current-sensing topology in full-bridge driver with high-side and low-side energy matching calibration

#42
20210337321
2021-10-28

Hearing device comprising an amplifier system for minimizing variation in an acoustical signal caused by variation in gain of an amplifier

#43
20210313933
2021-10-07

Devices and methods for offset cancellation

#44
20210211109
2021-07-08

Amplifier with adaptively-controlled local feedback loop

#45
20210194436
2021-06-24

Power amplifier module with temperature compensation

#46
20210091724
2021-03-25

Analog bias control of RF amplifiers

#47
20210048474
2021-02-18

Mismatch detection using replica circuit

#48
20210044265
2021-02-11

Distortion reducing variable output impedance class-D amplifier

#49
20210044264
2021-02-11

Class-D amplifier with multiple power rails and quantizer that switches used ramp amplitude concurrently with switch in used power rail

#50
20200403588
2020-12-24

Charge pump with current mode output power throttling

#51
20200336109
2020-10-22

Broadband driver with extended linear output voltage

#52
20200321913
2020-10-08

Swing tracking and control

#53
20200313628
2020-10-01

High frequency power supply device and high frequency power supply method

#54
20200273528
2020-08-27

Semiconductor memory device and memory system having the same

#55
20200244236
2020-07-30

ZERO VOLTAGE SWITCHING CONTROL DEVICE OF AMPLIFIER, AND WIRELESS POWER TRANSMISSION DEVICE

#56
20200235713
2020-07-23

Coherent optical modem with method to discover and control an amplifier's automatic gain control (AGC) loop bandwidth

#57
20200213778
2020-07-02

Hearing device comprising an amplifier system for minimizing variation in an acoustical signal caused by variation in gain of an amplifier

#58
20200186098
2020-06-11

Transimpedance amplifiers with feedforward current

#59
20200168734
2020-05-28

Self-biasing and self-sequencing of depletion mode transistors

#60
20200153399
2020-05-14

Auto zero offset current mitigation at an integrator input

#61
20200144970
2020-05-07

FET operational temperature determination by gate structure resistance thermometry

#62
20200144969
2020-05-07

FET operational temperature determination by field plate resistance thermometry

#63
20200136569
2020-04-30

Amplifier

#64
20200136560
2020-04-30

BROADBAND DRIVER WITH EXTENDED LINEAR OUTPUT VOLTAGE

#65
20200135441
2020-04-30

Amplifier

#66
20200127606
2020-04-23

Amplifying device and controlling method therefor

#67
20200124658
2020-04-23

Constant power circuit with variable heating and measurement current capability

#68
20200106406
2020-04-02

Increased output impedance switching amplifier and low-side recycle mode

#69
20200106393
2020-04-02

Amplifier power converter input current/power limit adjustment using amplifier load determinations

#70
20200044612
2020-02-06

TRANSMITTER DYNAMIC RF POWER CONTROL VIA VSWR DETECTION FOR WIRELESS RADIOS

#71
20200036352
2020-01-30

Gain control in a class-D open-loop amplifier

#72
20200014354
2020-01-09

Method to discover and control an amplifier's automatic gain control (AGC) loop bandwidth

#73
20190372531
2019-12-05

Amplifier with local feedback loop

#74
20190319720
2019-10-17

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

#75
20190305730
2019-10-03

Gain amplifier for reducing inter-channel error

#76
20190302163
2019-10-03

Floating input detection

#77
20190296698
2019-09-26

Phased array antenna system

#78
20190296697
2019-09-26

Phased array antenna system

#79
20190288671
2019-09-19

Electronically tuned RF termination

#80
20190245085
2019-08-08

Self-biasing and self-sequencing of depletion-mode transistors

#81
20190214947
2019-07-11

Audio power source with improved efficiency

#82
20190199459
2019-06-27

Voltage detector and communication circuit including voltage detector

#83
20190187218
2019-06-20

Voltage detector circuit

#84
20190173433
2019-06-06

Power amplifier self-heating compensation circuit

#85
20190165736
2019-05-30

Envelope trackers providing compensation for power amplifier output load variation

#86
20190149107
2019-05-16

Low power dissipation high performance Class-D amplifier

#87
20190149101
2019-05-16

Class-D amplifier with multiple independent output stages

#88
20190146011
2019-05-16

Voltage detection device

#89
20190128935
2019-05-02

Load detector

#90
20190113564
2019-04-18

Mismatch detection using replica circuit

#91
20190097581
2019-03-28

Semiconductor device and semiconductor integrated circuit using the same

#92
20190036497
2019-01-31

Reconfigurable amplifier and amplification method thereof

#93
20190036490
2019-01-31

Amplifier circuit for amplifying an output signal of a capacitive sensor

#94
20190007002
2019-01-03

Apparatus and methods for overload protection of low noise amplifiers

#95
20180358941
2018-12-13

Capacitive loading mode measurement circuit with compensation of measurement errors due to parasitic sensor impedances

#96
20180358937
2018-12-13

Protective device

#97
20180358935
2018-12-13

Total harmonic distortion (THD) controlled clip detector and automatic gain limiter (AGL)

#98
20180335454
2018-11-22

Current sensing in a USB power control analog subsystem

#99
20180331659
2018-11-15

Envelope trackers providing compensation for power amplifier output load variation

#100
20180316320
2018-11-01

Method for producing an amplification stage for a variable envelope signal

#101
20180262164
2018-09-13

Power amplifier self-heating compensation circuit

#102
20180234063
2018-08-16

Charge pump with current mode output power throttling

#103
20180198418
2018-07-12

Semiconductor device having a low power consumption

#104
20180198415
2018-07-12

Dual hysteretic control loop of envelope tracking

#105
20180196457
2018-07-12

Regenerative current detection circuit, charge current detection circuit, and motor current detection system

#106
20180191317
2018-07-05

Differential sensing circuit of a floating voltage source

#107
20180191310
2018-07-05

Total harmonic distortion (THD) controlled clip detector and automatic gain limiter (AGL)

#108
20180191306
2018-07-05

Op-amp IC chip

#109
20180164366
2018-06-14

Mismatch detection using replica circuit

#110
20180091912
2018-03-29

MOBILE DEVICE AND SYSTEM COMPRISING A LOUDSPEAKER AND AN AMPLIFIER

#111
20180069513
2018-03-08

Common-mode feedback for differential amplifier

#112
20180026598
2018-01-25

Embedded speaker protection for automotive audio power amplifier

#113
20180019718
2018-01-18

Differential signal conditioner with common mode voltage error compensation

#114
20180012639
2018-01-11

Sense amplifier

#115
20170353160
2017-12-07

Multiphase power supply having single comparator

#116
20170350923
2017-12-07

Load detector

#117
20170336817
2017-11-23

Inverting amplifier receiving negative feedback voltage in voltage regulator

#118
20170331432
2017-11-16

Amplifying circuit

#119
20170310288
2017-10-26

Systems and methods for predictive switching in audio amplifiers

#120
20170279415
2017-09-28

Apparatus and methods for overload protection of low noise amplifiers

#121
20170243622
2017-08-24

Sense amplifier

#122
20170212193
2017-07-27

Magnetic resonance imaging apparatus, radio frequency amplification system and method

#123
20170207758
2017-07-20

Power amplifier system and associated control circuit and control method

#124
20170163352
2017-06-08

Trans-impedance amplifier and optical receiver including the same

#125
20170160316
2017-06-08

Class D audio amplifier and method for reading a current supplied by the amplifier

#126
20170155365
2017-06-01

Amplifier arrangement and amplification method

#127
20170146591
2017-05-25

Mismatch detection using replica circuit

#128
20170142786
2017-05-18

Low-headroom constant current source for high-current applications

#129
20170141748
2017-05-18

Amplifier system, controller of main amplifier and associated control method

#130
20170141741
2017-05-18

Apparatus and methods for protecting radio frequency amplifiers from overdrive

#131
20170111012
2017-04-20

Method and apparatus for maintaining DC bias

#132
20170093505
2017-03-30

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

#133
20170085235
2017-03-23

SINGLE POLE DOUBLE THROW AMPLIFIER

#134
20170085233
2017-03-23

Amplifier system

#135
20170070201
2017-03-09

Embedded speaker protection for automotive audio power amplifier

#136
20170047987
2017-02-16

Systems and methods for performing shape estimation using sun sensors in large-scale space-based solar power stations

#137
20170047463
2017-02-16

Systems and methods for controlling supply voltages of stacked power amplifiers

#138
20170040960
2017-02-09

Amplifier for modulating the amplitude of an RF signal

#139
20160360315
2016-12-08

Audio apparatus, and current control method

#140
20160344349
2016-11-24

Transistor package, amplification circuit including the same, and method of forming transistor

#141
20160336778
2016-11-17

Apparatus for performing multi-loop power control in an electronic device with aid of analog compensation and duty cycle selection, and associated method

#142
20160336150
2016-11-17

Method for controlling an RF generator

#143
20160322203
2016-11-03

Method for controlling an RF generator

#144
20160315592
2016-10-27

Sense amplifier of semiconductor device

#145
20160301368
2016-10-13

Hot carrier injection compensation

#146
20160294336
2016-10-06

Balanced differential transimpedance amplifier with single ended input and balancing method

#147
20160276988
2016-09-22

Voltage detecting circuit and power amplifier

#148
20160269825
2016-09-15

Embedded speaker protection for automotive audio power amplifier

#149
20160240156
2016-08-18

Amplifier circuit applied to display apparatus

#150
20160240155
2016-08-18

AMPLIFIER CIRCUIT APPLIED IN SOURCE DRIVER OF LIQUID CRYSTAL DISPLAY

#151
20160233842
2016-08-11

Devices and methods for improving yield of scalable periphery amplifiers

#152
20160197586
2016-07-07

Peak detecting cascode for breakdown protection

#153
20160190992
2016-06-30

Bias circuit for a transistor amplifier

#154
20160181997
2016-06-23

SIGNAL AMPLIFYING CIRCUIT

#155
20160173041
2016-06-16

Hot-swap current-sensing system

#156
20160165348
2016-06-09

Systems and methods for detection of load impedance of a transducer device coupled to an audio device

#157
20160118945
2016-04-28

Offset compensation for sense amplifiers

#158
20160099742
2016-04-07

Apparatus and methods for calibration of envelope trackers

#159
20160099730
2016-04-07

Amplifier

#160
20160072452
2016-03-10

System and method for power amplifier over-voltage protection

#161
20150333703
2015-11-19

Variable switched DC-to-DC voltage converter

#162
20150332630
2015-11-19

Sensing apparatus of display panel

#163
20150311876
2015-10-29

Amplifiers and related biasing methods and devices

#164
20150311872
2015-10-29

Apparatus and methods for amplifier input protection

#165
20150311868
2015-10-29

Digitally-programmable gain amplifier with direct-charge transfer and offset cancellation

#166
20150304773
2015-10-22

Embedded speaker protection for automotive audio power amplifier

#167
20150280655
2015-10-01

Hot carrier injection compensation

#168
20150249479
2015-09-03

RF switch with integrated tuning

#169
20150249430
2015-09-03

Compensating a two stage amplifier

#170
20150214910
2015-07-30

Operational transconductance amplifier with increased current sinking capability

#171
20150212131
2015-07-30

Apparatuses and methods for measuring flicker noise

#172
20150155843
2015-06-04

Amplifying system

#173
20150155835
2015-06-04

Reduced power amplifier load impact for open loop envelope tracking

#174
20150155834
2015-06-04

Apparatus and methods for calibrating envelope trackers

#175
20150147986
2015-05-28

Power amplifier with self aligned peaking stage

#176
20150145604
2015-05-28

High efficiency radio frequency power amplifier circuitry with reduced distortion

#177
20150145594
2015-05-28

Overstress management for power amplifiers

#178
20150124982
2015-05-07

Method of estimating diaphragm excursion of a loudspeaker

#179
20150109055
2015-04-23

Method of reducing power dissipation in a switching amplifier and circuit implementing such method

#180
20150078560
2015-03-19

Systems and methods for detection of load impedance of a transducer device coupled to an audio device

#181
20150078559
2015-03-19

Systems and methods for detection of load impedance of a transducer device coupled to an audio device

#182
20140368280
2014-12-18

Protection module for RF-amplifier

#183
20140300422
2014-10-09

High output power amplifier

#184
20140300421
2014-10-09

Power amplifier circuit based on a cascode structure

#185
20140203869
2014-07-24

Communications based adjustments of an offset capacitive voltage

#186
20140203868
2014-07-24

Communications based adjustments of a parallel amplifier power supply

#187
20130223649
2013-08-29

Load current sensing

#188
20130147559
2013-06-13

Fully differential autozeroing amplifier

#189
20120293254
2012-11-22

Variable switched DC-to-DC voltage converter

#190
20120208476
2012-08-16

High frequency power amplifier, transmitter and mobile communication terminal using the power amplifier

#191
20120200354
2012-08-09

Apparatus and methods for envelope tracking calibration

#192
20120154056
2012-06-21

Method and apparatus for canceling balun amplifier noise

#193
20120154052
2012-06-21

Power amplifying apparatus

#194
20120146721
2012-06-14

Voltage detection circuit

#195
20120098601
2012-04-26

Amplifying circuit

#196
20120092075
2012-04-19

Power amplification systems and methods

#197
20120092072
2012-04-19

Offset compensation for sense amplifiers

#198
20120086519
2012-04-12

Impedance-matching circuits for multi-output power supplies driving COgas-discharge lasers

#199
20120049956
2012-03-01

Amplifiers and related biasing methods and devices

#200
20120038415
2012-02-16

Method and apparatus for maintaining circuit stability

#201
20120008796
2012-01-12

Distortion compensation

#202
20120001693
2012-01-05

Power amplifier amplitude modulator system and method

#203
20110275330
2011-11-10

System and method for power amplifier over-voltage protection

#204
20110254630
2011-10-20

Power amplifier protection

#205
20110241782
2011-10-06

Power amplifier

#206
20110169565
2011-07-14

Receiving circuit

#207
20110136450
2011-06-09

POWER CIRCUIT AND RADIO COMMUNICATION CIRCUIT USING SAME AND METHOD OF OPERATING A CIRCUIT

#208
20110074467
2011-03-31

Power supply method, apparatus, and system for a radio frequency power amplifier

#209
20100264991
2010-10-21

Switched capacitor voltage converter for a power amplifier

#210
20100237946
2010-09-23

Low noise amplifier circuit with noise cancellation and increased gain

#211
20100120385
2010-05-13

Radio frequency amplification circuit utilizing variable voltage generator

#212
20100041354
2010-02-18

Method and apparatus for controling output power of communication equipment

#213
20100013555
2010-01-21

Power amplifier

#214
20090224834
2009-09-10

Switched capacitor voltage converter for a power amplifier

#215
20090189449
2009-07-30

Power source and method for controlling operational power

#216
20090174496
2009-07-09

Load-line adaptation

#217
20090128233
2009-05-21

Shared linearity maintenance in power amplifiers

#218
20090096524
2009-04-16

Differential amplification circuit and manufacturing method thereof

#219
20090039963
2009-02-12

Circuit for inhibiting over-current in power amplifier

#220
20090015324
2009-01-15

Power amplifier amplitude modulator system and method

#221
20090002072
2009-01-01

Power amplification device

#222
20080278141
2008-11-13

RF power sensing circuit

#223
20080272750
2008-11-06

Device

#224
20080260183
2008-10-23

Communication method for vacuum tube replacement devices

#225
20080239597
2008-10-02

Peak Voltage Protection Circuit and Method

#226
20080186092
2008-08-07

Shared linearity maintenance in power amplifiers

#227
20080174356
2008-07-24

Wave detector circuit

#228
20080061875
2008-03-13

System and method for power amplifier output power control

#229
20080061874
2008-03-13

System and method for power amplifier output power control

#230
20080054993
2008-03-06

Amplifier apparatus and method

#231
20080003962
2008-01-03

Method and apparatus for providing adaptive supply voltage control of a power amplifier

#232
20080001670
2008-01-03

Circuit for accurately controlling power amplifier output power

#233
20070296504
2007-12-27

Integrated implementation of a voltage boost follower and method therefor

#234
20070285158
2007-12-13

Amplifier unit and method of detecting failure in the same

#235
20070285156
2007-12-13

Expanded performance and functions for vacuum tube replacement devices

#236
20070279129
2007-12-06

Methods and apparatus to provide slew enhancement for low power amplifiers

#237
20070236295
2007-10-11

FM Power Amplifier With Antenna Power Control

#238
20070236292
2007-10-11

Fast settling power amplifier regulator

#239
20070211364
2007-09-13

Magnetoresistive head preamplifier circuit with programmable input impedance

#240
20070200629
2007-08-30

Low voltage amplifier having a class-AB control circuit

#241
20070182483
2007-08-09

POWER AMPLIFIER BIAS PROTECTION FOR DEPLETION MODE TRANSISTOR

#242
20070159215
2007-07-12

Wide input common mode sense amplifier

#243
20070154034
2007-07-05

Circuit for suppressing audio noise

#244
20070140513
2007-06-21

Distortion compensation

#245
20070109050
2007-05-17

Power supply rejection for pulse width modulated amplifiers and automatic gain control

#246
20070103233
2007-05-10

Apparatus for optimizing gate bias of radio frequency amplifier and method thereof

#247
20070098190
2007-05-03

Method and apparatus to control output power of a digital power amplifier optimized to a headphone and a portable audio player having the same

#248
20070063774
2007-03-22

Method and apparatus for controlling the output power of a power amplifier

#249
20070057729
2007-03-15

Power amplifier and wireless communication device

#250
20070040611
2007-02-22

Protection circuit of digital amplifier

#251
20070035408
2007-02-15

Indicators for vacuum tube replacement devices

#252
20070018719
2007-01-25

Class AB-D audio power amplifier

#253
20070008038
2007-01-11

Power amplifier arrangement, particularly for mobile radio, and method for determining a performance parameter

#254
20060267688
2006-11-30

High frequency power amplifier, transmitter and mobile communication terminal using the power amplifier

#255
20060261860
2006-11-23

DC to DC converter and voltage detecting circuit and current detecting circuit thereof

#256
20060250183
2006-11-09

Systems and methods for driving an output transistor

#257
20060250121
2006-11-09

PFM control circuit for DC regulator

#258
20060232338
2006-10-19

Amplifier system having compensated amplification variation

#259
20060181351
2006-08-17

Power control circuit for accurate control of power amplifier output power

#260
20060017538
2006-01-26

Distributed active transformer power control techiques

#261
20050186922
2005-08-25

Mobile-communication equipment and transmission power control method

#262
20050179489
2005-08-18

Power supply rejection for pulse width modulated amplifiers and automatic gain control

#263
20050163324
2005-07-28

Apparatus and method of limiting power applied to a loudspeaker

#264
20050122172
2005-06-09

Biased Darlington transistor pair, method, and system

#265
20050111574
2005-05-26

Transmission device with digital predistortion, and method for regulating predistortion in a transmission device

#266
20050059362
2005-03-17

Method and apparatus providing integrated load matching using adaptive power amplifier compensation

#267
20050030100
2005-02-10

Method and apparatus for controlling the output power of a power amplifier

#268
20050024145
2005-02-03

Fast settling power amplifier regulator

#269
17411031
2023-07-04

Audio power source with improved efficiency

#270
16387532
2020-05-26

Circuit and method for biasing transistor

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2019-08-27

Amplifier with common mode loop and chop

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2019-01-22

Phased array antenna system

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2017-06-13

Cable TV amplifier system

#274
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2018-01-30

Linear amplifier with extended linear output range

#275
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2016-01-19

Transceiver circuitry with summation node common mode droop reduction

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2015-01-06

Sense amplifier with cross-coupled transistor pair