Patents-Review.com
ClassID:

219728 ⎘

H03F2203/21127 - CPC Classification

Classification description:

Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by; Indexing scheme relating to power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only using a combination of several amplifiers the input bias current of a power amplifier being controlled, e.g. by an active current source or a current mirror

Recent Application in this class:
#1
20260155791
2026-06-04

POWER AMPLIFIER APPARATUS

 #2
20260142625
2026-05-21

PROTECTION CIRCUIT

 #3
20250364952
2025-11-27

DOHERTY POWER AMPLIFIER

 #4
20240429878
2024-12-26

MULTI-PATH AMPLIFICATION CIRCUIT FOR OPERATING IN DIFFERENT POWER MODES

 #5
20240213930
2024-06-27

OVERCURRENT PROTECTION CIRCUIT AND POWER AMPLIFIER INCLUDING OVERCURRENT PROTECTION CIRCUIT

 #6
20240195369
2024-06-13

High frequency power amplification device

 #7
20240039487
2024-02-01

Radio-frequency power amplifier device

 #8
20230291359
2023-09-14

DOHERTY POWER AMPLIFIER

 #9
20230246605
2023-08-03

CLASS AB MONTICELLI OUTPUT STAGE DESIGN WITH BIAS TEMPERATURE INSTABILITY TOLERANCE

 #10
20210249995
2021-08-12

Power amplifier apparatus

 #11
20210226589
2021-07-22

Power amplifier and power amplifier module

 #12
20210111679
2021-04-15

Power splitter with signal amplification

 #13
20210111677
2021-04-15

Multi-stage amplifier including a pre-driver stage

 #14
20200366251
2020-11-19

Amplifying device with bias timing control circuit based on duty cycle

 #15
20200259472
2020-08-13

Biasing an amplifier using a mirror bias signal

 #16
20190326865
2019-10-24

Control circuit for power amplifier

 #17
20190199293
2019-06-27

Power amplifying apparatus with wideband linearity

 #18
20190123699
2019-04-25

Power splitter with cascode stage selection

 #19
20190123698
2019-04-25

Common base pre-amplifier

 #20
20190036488
2019-01-31

Radio-frequency signal amplifier circuit, power amplifier module, front-end circuit, and communication device

 #21
20180226925
2018-08-09

Power amplifier bias circuit with a mirror device to provide a mirror bias signal

 #22
20180054169
2018-02-22

Amplifier biasing circuits and method

 #23
20180026594
2018-01-25

Peaking amplifier bias control

 #24
20170237403
2017-08-17

Multiplexed multi-stage low noise amplifier uses gallium arsenide and CMOS dice

 #25
20170133989
2017-05-11

Bias control for stacked transistor configuration

 #26
20170104457
2017-04-13

Multiplexed multi-stage low noise amplifier uses gallium arsenide and CMOS dies

 #27
20170047463
2017-02-16

Systems and methods for controlling supply voltages of stacked power amplifiers

 #28
20160322944
2016-11-03

Power amplification module

 #29
20160322940
2016-11-03

Power amplifier and method for limiting current in power amplifier

 #30
20160241295
2016-08-18

Power amplification system with common base pre-amplifier

 #31
20160241210
2016-08-18

Power amplifier with cascode switching or splitting functionality

 #32
20160241209
2016-08-18

Doherty power amplifier having AM-AM compensation

 #33
20160155830
2016-06-02

Compound semiconductor device

 #34
20160094189
2016-03-31

Power amplifier bias circuit

 #35
20160087589
2016-03-24

Amplifier with base current reuse

 #36
20160065400
2016-03-03

Adaptive linearizer

 #37
20150365058
2015-12-17

Hybrid class operation power amplifier

 #38
20150333704
2015-11-19

Method for class-B amplifier mismatch correction

 #39
20150270806
2015-09-24

Bias control for stacked transistor configuration

 #40
20150256138
2015-09-10

Fully differential class A/AB amplifier and method thereof

 #41
20150236659
2015-08-20

Multimode power amplifier and method of switching among multiple modes thereof, and mobile terminal

 #42
20150236652
2015-08-20

Multi mode bias modulator operating in envelope tracking mode or average power tracking mode and envelope tracking power amplifier using the same

 #43
20150236651
2015-08-20

Multi-mode bias modulator and envelope tracking power amplifier using the same

 #44
20150180426
2015-06-25

ADAPTIVE RECEIVER/TRANSMITTER AMPLIFIER CIRCUIT

 #45
20150171797
2015-06-18

Linearity performance for multi-mode power amplifiers

 #46
20150054583
2015-02-26

Power amplifier

 #47
20130141474
2013-06-06

Voltage summing buffer, digital-to-analog converter and source driver of display device including the same

 #48
20130135049
2013-05-30

Incremental gain amplifier

 #49
20110095823
2011-04-28

Incremental gain amplifier

 #50
20090284316
2009-11-19

Amplifier device

 #51
15444233
2017-12-19

Wireless communication device and wireless communication method