ClassID:

219123

H03F1/0233 - page 2 - CPC Classification

Classification description:

Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements; Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current; Continuous control by using a signal derived from the output signal, e.g. bootstrapping the voltage supply

Recent Application in this class:
#301
20150180431
2015-06-25

DC offset canceller

#302
20150171768
2015-06-18

Inverter/power amplifier with capacitive energy transfer and related techniques

#303
20150162878
2015-06-11

Harmonics cancellation circuit for a power amplifier

#304
20150145606
2015-05-28

Power amplifier

#305
20150145600
2015-05-28

Circuits and methods for power amplification with extended high efficiency

#306
20150145599
2015-05-28

Radio frequency signal amplifying system

#307
20150137893
2015-05-21

Parallel correction amplifier

#308
20150123733
2015-05-07

Power control

#309
20150116039
2015-04-30

Adaptive adjustment of power splitter

#310
20150116032
2015-04-30

Pre-distortion based power control

#311
20150109055
2015-04-23

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

#312
20150091653
2015-04-02

Reconfigurable load modulation amplifier

#313
20150087251
2015-03-26

RF power transmission, modulation, and amplification, including direct cartesian 2-branch embodiments

#314
20150061610
2015-03-05

Controller and a method for controlling a process variable and a power supply circuit comprising a power supply and a controller

#315
20150054584
2015-02-26

Class AB signal generation apparatus

#316
20150052573
2015-02-19

Fiber-optic node with forward data content driven power consumption

#317
20150049822
2015-02-19

Pilot tone for amplifier bias point

#318
20150042406
2015-02-12

Peak-to-average ratio detector

#319
20150038092
2015-02-05

Power amplifier open loop current clamp

#320
20150035608
2015-02-05

DISTORTION COMPENSATING APPARATUS AND DISTORTION COMPENSATION METHOD

#321
20150035606
2015-02-05

Time and amplitude alignment in envelope tracking amplification stage

#322
20150022271
2015-01-22

Dynamic amplifier supply

#323
20150002233
2015-01-01

Control loop for amplification stage

#324
20150002220
2015-01-01

Method of power amplifier calibration

#325
20140375388
2014-12-25

High speed power supply system

#326
20140347130
2014-11-27

Semiconductor integrated circuit device and high-frequency power amplifier module

#327
20140320213
2014-10-30

Radio frequency power amplifier circuit and method

#328
20140315503
2014-10-23

Multiple input single output device with vector signal and bias signal inputs

#329
20140266426
2014-09-18

Self setting power supply using negative output impedance

#330
20140210432
2014-07-31

Voltage adjusting circuit for amplifier circuit and method thereof

#331
20140133526
2014-05-15

Circuit, transceiver and mobile communication device

#332
20140091861
2014-04-03

High speed power supply system

#333
20130328624
2013-12-12

Systems, and methods of RF power transmission, modulation, and amplification, including embodiments for output stage protection

#334
20130272547
2013-10-17

Adaptive rail power amplifier technology

#335
20130222055
2013-08-29

Feedback control and coherency of multiple power supplies in radio frequency power delivery systems for pulsed mode schemes in thin film processing

#336
20130113559
2013-05-09

DEVICE AND METHOD FOR PRE-DISTORTING AND AMPLIFYING A SIGNAL BASED ON AN ERROR ATTRIBUTE

#337
20130106465
2013-05-02

Self-powered comparator

#338
20130033328
2013-02-07

Efficient power amplifier

#339
20130016748
2013-01-17

Transimpedance amplifier, semiconductor device, and optical module to include an adding circuit for adding first and second current variation

#340
20130002346
2013-01-03

Parallel correction amplifier

#341
20120243637
2012-09-27

Power amplification based on phase angle controlled reference signal and amplitude control signal

#342
20120229208
2012-09-13

Power control

#343
20120200360
2012-08-09

Power amplifier with dynamically added supply voltages

#344
20120182074
2012-07-19

Single die power amplifier with closed loop power control

#345
20120157020
2012-06-21

Amplifier circuit, control method for supplying power to amplifier circuit, and transmission device

#346
20120139636
2012-06-07

Power amplifier system with a current bias signal path

#347
20120139635
2012-06-07

Gate-based output power level control power amplifier

#348
20120098504
2012-04-26

High efficiency variable voltage supply

#349
20120087445
2012-04-12

Control modules

#350
20120056677
2012-03-08

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

#351
20120025917
2012-02-02

Efficient amplification stage

#352
20120013400
2012-01-19

Current control circuit, class AB operational amplifier system and current control method

#353
20110291857
2011-12-01

Method of power amplifier calibration

#354
20110279179
2011-11-17

Apparatus and method for controlling power amplifier

#355
20110170713
2011-07-14

Amplification apparatus

#356
20110109347
2011-05-12

Self-powered comparator

#357
20110089990
2011-04-21

Control loop for amplification stage

#358
20110068872
2011-03-24

Amplifying apparatus

#359
20110032039
2011-02-10

Efficient power amplifier

#360
20110032032
2011-02-10

Digital predistorter for variable supply amplifier

#361
20110012679
2011-01-20

High efficiency microwave amplifier

#362
20100311365
2010-12-09

Power amplifier controller with polar transmitter

#363
20100250993
2010-09-30

High speed power supply system

#364
20100237948
2010-09-23

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

#365
20100119010
2010-05-13

Control modules

#366
20090322422
2009-12-31

Signal amplification

#367
20090264145
2009-10-22

DYNAMIC BIAS FOR RF POWER AMPLIFIERS

#368
20090224860
2009-09-10

System and method of using residual voltage from a prior operation to establish a bias voltage for a subsequent operation

#369
20090174473
2009-07-09

Systems, methods, and apparatuses for linear envelope elimination and restoration transmitters

#370
20090163169
2009-06-25

Low-noise block

#371
20090128235
2009-05-21

Power save mode for audio interface drive amplifier

#372
20090115531
2009-05-07

Efficient power amplifier

#373
20090081968
2009-03-26

Power amplifier controller with polar transmitter

#374
20090061797
2009-03-05

Mobile transmitter and transmitting method thereof

#375
20080211583
2008-09-04

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

#376
20080180169
2008-07-31

Multimode amplifier for operation in linear and saturated modes

#377
20080171523
2008-07-17

Power Amplifier Bias Control

#378
20080068049
2008-03-20

Current-regulated, bootstrapped-biased, high to low impedance signal-buffer/output-driver for audio electronics

#379
20070290749
2007-12-20

Systems, methods, and apparatuses for multi-path orthogonal recursive predistortion

#380
20070290748
2007-12-20

Systems, methods, and apparatuses for linear envelope elimination and restoration transmitters

#381
20070236295
2007-10-11

FM Power Amplifier With Antenna Power Control

#382
20070210771
2007-09-13

High efficiency variable voltage supply

#383
20070202819
2007-08-30

RF power transmission, modulation, and amplification, including cartesian 4-branch embodiments

#384
20070178859
2007-08-02

Systems and methods of RF power transmission, modulation, and amplification, including cartesian 4-branch embodiments

#385
20070133714
2007-06-14

Systems and methods of RF power transmission, modulation, and amplification, including transfer function embodiments

#386
20070123184
2007-05-31

Signal processor for use with a power amplifier in a wireless circuit

#387
20070116145
2007-05-24

Systems and methods of RF power transmission, modulation, and amplification, including transfer function embodiments

#388
20070087709
2007-04-19

Multiple input single output (MISO) amplifier with circuit branch output tracking

#389
20070087708
2007-04-19

RF power transmission, modulation, and amplification, including harmonic control embodiments

#390
20070082628
2007-04-12

Systems and methods of RF power transmission, modulation, and amplification, including multiple input single output (MISO) amplifier embodiments comprising harmonic control circuitry

#391
20070066253
2007-03-22

RF power transmission, modulation, and amplification, including power control of multiple input single output (MISO) amplifiers

#392
20070066252
2007-03-22

Systems and methods of RF power transmission, modulation, and amplification, including output stage protection circuitry

#393
20070066251
2007-03-22

Systems and methods of RF power transmission, modulation, and amplification, including Cartesian-Polar-Cartesian-Polar (CPCP) embodiments

#394
20070060076
2007-03-15

Multiple input single output (MISO) amplifier having multiple transistors whose output voltages substantially equal the amplifier output voltage

#395
20070057722
2007-03-15

Power amplification apparatus of a portable terminal

#396
20070026822
2007-02-01

Systems and methods of RF power transmission, modulation, and amplification, including waveform distortion compensation embodiments

#397
20070026821
2007-02-01

RF power transmission, modulation, and amplification using multiple input single output (MISO) amplifiers to process phase angle and magnitude information

#398
20070014382
2007-01-18

Reconfigurable transmitter

#399
20060293000
2006-12-28

RF power transmission, modulation, and amplification, including direct cartesian 2-branch embodiments

#400
20060292999
2006-12-28

Systems and methods of RF power transmission, modulation, and amplification, including a Cartesian-Polar-Cartesian-Polar (CPCP) embodiment

#401
20060270366
2006-11-30

Dual voltage regulator for a supply voltage controlled power amplifier in a closed power control loop

#402
20060245517
2006-11-02

Amplifier apparatus

#403
20060202889
2006-09-14

Mobile communications terminal having driving voltage control apparatus and method thereof

#404
20060166630
2006-07-27

Dynamic bias for RF power amplifiers

#405
20060119426
2006-06-08

Dual band power amplifier module for wireless communication devices

#406
20060114068
2006-06-01

Phase-locked loop circuit

#407
20060104384
2006-05-18

Systems and methods for vector power amplification

#408
20060099919
2006-05-11

Systems and methods for vector power amplification

#409
20060087372
2006-04-27

Method and apparatus for maintaining constant linearity for a power amplifier over varying load conditions

#410
20050255809
2005-11-17

Method and control system for controlling the output power of an RF amplifier system

#411
20050242885
2005-11-03

Smart voltage rail reduction audio amplifier

#412
20050212601
2005-09-29

Power amplifiers

#413
20050035821
2005-02-17

High speed, high resolution amplifier topology

#414
20050012547
2005-01-20

High linearity doherty communication amplifier with phase control

#415
20050009480
2005-01-13

System and method for allowing a TDMA/CDMA portable transceiver to operate with closed loop power control

#416
18171899
2026-02-10

Bandwidth adaptation in a transmission circuit

#417
17303293
2022-10-04

Digitally modulated polar power amplifier

#418
17161815
2022-04-19

Common mode output voltage biasing in class-D audio amplifiers having selectable differential or dual single-ended operation

#419
15451178
2018-01-02

Biasing for lower Rof LDO pass devices

#420
15415768
2018-06-12

LDO with fast recovery from saturation

#421
15073853
2017-04-25

Bias circuit having reduced power consumption

#422
14457855
2016-06-14

Mitigation of radio-frequency interference at a remote radio head