Patents-Review.com
ClassID:

219127 ⎘

H03F1/0255 - 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; Stepped control by using a signal derived from the output signal

Recent Application in this class:
#1
20260135521
2026-05-14

FAULT PROTECTION CIRCUITS AND METHODS

 #2
20260081572
2026-03-19

NON-LINEAR FUNCTION IN AN EARLY-SAMPLED HYBRID MULTI-LEVEL CONVERTER AMPLIFIER SYSTEM

 #3
20260005658
2026-01-01

SWITCHING AMPLIFIER CIRCUITRY

 #4
20250392263
2025-12-25

DIFFERENTIAL HYBRID SUPPLY GENERATOR AND SUPPLY MODULATOR WITH MULTIPLE OUTPUTS

 #5
20250237680
2025-07-24

LOAD CURRENT SENSING IN A SWITCHED DRIVER STAGE

 #6
20250007471
2025-01-02

High-Speed, High-Power Operational Amplifier and Linear Amplitude Modulator

 #7
20240162867
2024-05-16

CLASS-D AMPLIFIER ABLE TO REDUCE POWER NOISE

 #8
20240088844
2024-03-14

AUDIO AMPLIFICATION METHOD AND DEVICE

 #9
20240056039
2024-02-15

SWITCHING AMPLIFIER CIRCUITRY

 #10
20240014791
2024-01-11

AMPLIFIER SYSTEM

 #11
20230402978
2023-12-14

Audio Amplifier

 #12
20230344394
2023-10-26

NON-LINEAR FUNCTION IN AN EARLY-SAMPLED HYBRID MULTI-LEVEL CONVERTER AMPLIFIER SYSTEM

 #13
20200195209
2020-06-18

Radio frequency power amplifier module having high linearity and power-added efficiency and implementation method

 #14
20200052654
2020-02-13

Apparatus and method for assisting envelope tracking with transient response in supply voltage for power amplifier

 #15
20200036347
2020-01-30

Source follower

 #16
20190267947
2019-08-29

Envelope tracking power management circuit

 #17
20190165736
2019-05-30

Envelope trackers providing compensation for power amplifier output load variation

 #18
20180331660
2018-11-15

Class D audio amplifier with adjustable gate drive

 #19
20180331659
2018-11-15

Envelope trackers providing compensation for power amplifier output load variation

 #20
20180302038
2018-10-18

Power amplifier ramping and power control with forward and reverse back-gate bias

 #21
20180167036
2018-06-14

Source follower

 #22
20180159476
2018-06-07

ENVELOPE TRACKING FOR RADIO-FREQUENCY APPLICATIONS

 #23
20180117630
2018-05-03

Method of controlling amplifiers, corresponding circuit and device

 #24
20180109233
2018-04-19

Semiconductor device

 #25
20180069516
2018-03-08

Method and apparatus for supplying power to an amplifier

 #26
20180019709
2018-01-18

Input/output cell for integrated circuits

 #27
20180006610
2018-01-04

Low-noise high efficiency bias generation circuits and method

 #28
20170214370
2017-07-27

Adaptive power amplifier supply with pre-distortion mechanism

 #29
20170170721
2017-06-15

Low-Noise High Efficiency Bias Generation Circuits and Method

 #30
20160197586
2016-07-07

Peak detecting cascode for breakdown protection

 #31
20160072485
2016-03-10

Circuit for reducing slope magnitude during increasing and decreasing voltage transitions

 #32
20160036389
2016-02-04

Envelope tracking with low frequency loss correction

 #33
20150311785
2015-10-29

Low-noise high efficiency bias generation circuits and method

 #34
20150145600
2015-05-28

Circuits and methods for power amplification with extended high efficiency

 #35
20140210432
2014-07-31

Voltage adjusting circuit for amplifier circuit and method thereof

 #36
20140111277
2014-04-24

Apparatus and method for expanding operation region of power amplifier

 #37
20130195219
2013-08-01

MOBILE WIRELESS COMMUNICATIONS DEVICE WITH SELECTIVE POWER AMPLIFIER CONTROL AND RELATED METHODS

 #38
20130127547
2013-05-23

Efficient supply voltage

 #39
20130107926
2013-05-02

Controlling a power amplifier based on transmitter output emissions

 #40
20130093513
2013-04-18

Apparatus and method for expanding operation region of power amplifier

 #41
20130033328
2013-02-07

Efficient power amplifier

 #42
20130033314
2013-02-07

Power based feedback for improved power amplifier (PA) efficiency

 #43
20130029617
2013-01-31

Voltage driving apparatus for power amplifier, power amplifying system, power supply device and communication device

 #44
20120313713
2012-12-13

Switching power supply

 #45
20120313610
2012-12-13

Power supply control circuit

 #46
20120223776
2012-09-06

Power supply controller for a multi-gain step RF power amplifier

 #47
20120219048
2012-08-30

Joint adaptive bias point adjustment and digital pre-distortion for power amplifier

 #48
20120214423
2012-08-23

Adaptive average power tracking

 #49
20120206203
2012-08-16

Dynamic current boost in class AB amplifier for low distortion

 #50
20120200360
2012-08-09

Power amplifier with dynamically added supply voltages

 #51
20120105154
2012-05-03

Switching power supply

 #52
20110170713
2011-07-14

Amplification apparatus

 #53
20110032039
2011-02-10

Efficient power amplifier

 #54
20100315097
2010-12-16

AMPLIFIER CIRCUIT

 #55
20100273536
2010-10-28

Method and apparatus for powering a wireless peripheral

 #56
20100264990
2010-10-21

Amplifying circuit, AC signal amplifying circuit and input bias adjusting method

 #57
20100259331
2010-10-14

High-linearity low noise amplifier

 #58
20100197365
2010-08-05

Error vector magnitude control within a linear transmitter

 #59
20090128235
2009-05-21

Power save mode for audio interface drive amplifier

 #60
20090115531
2009-05-07

Efficient power amplifier

 #61
20080265822
2008-10-30

Class G motor drive

 #62
20080122543
2008-05-29

Switching power supply

 #63
20070296504
2007-12-27

Integrated implementation of a voltage boost follower and method therefor

 #64
20070146076
2007-06-28

Power amplifier unit, communication terminal and control method of power amplifier unit

 #65
20050079835
2005-04-14

Transmitting method and transmitter apparatus

 #66
15659352
2018-07-03

Transmitter system and method of calibration