Patents-Review.com
ClassID:

220267 ⎘

H03G3/344 - CPC Classification

Classification description:

Gain control in amplifiers or frequency changers without distortion of the input signal; Automatic control in amplifiers having semiconductor devices; Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems Muting responsive to the amount of noise (noise squelch)

Recent Application in this class:
#1
20260019056
2026-01-15

AUDIO POWER AMPLIFIER CIRCUIT AND DUTY CYCLE MODULATION CIRCUIT AND NOISE SUPPRESSION CIRCUIT THEREOF

 #2
20230336136
2023-10-19

Noise shaper fader

 #3
20220360242
2022-11-10

Audio signal muting apparatus using negative power, and digital signal conversion apparatus equipped with same

 #4
20220345089
2022-10-27

Configurable phase tuned multi-gain LNA architecture

 #5
20220190801
2022-06-16

Automated pause of media content playback based on sound level

 #6
20220188063
2022-06-16

Audio control circuit and associated control method

 #7
20220121298
2022-04-21

Short-term noise suppression

 #8
20210021249
2021-01-21

Automated pause of media content playback based on sound level

 #9
20200196052
2020-06-18

Modular signal conversion apparatus and method

 #10
20200153405
2020-05-14

WIRING STRUCTURE FOR AUDIO SIGNAL CONVERSION APPARATUS FOR IMPROVING CROSS-TALK, AND AUDIO SIGNAL CONVERSION APPARATUS

 #11
20200112788
2020-04-09

Apparatus for discarding power noise, and apparatus for converting audio signal

 #12
20200091868
2020-03-19

Method and apparatus for calibration of a band-pass filter and squelch detector in a frequency-shift keying transceiver

 #13
20200067475
2020-02-27

Phase-locked loop with adjustable bandwidth

 #14
20200036355
2020-01-30

Audio signal muting apparatus, and digital signal conversion apparatus equipped with same

 #15
20190341897
2019-11-07

Automated pause of media content playback based on sound level

 #16
20190312556
2019-10-10

Single knob pre-amplifier gain-trim and fader

 #17
20190165748
2019-05-30

Audio system having variable reset volume

 #18
20190158051
2019-05-23

Radio communication device

 #19
20190088264
2019-03-21

Diffusivity based sound processing method and apparatus

 #20
20190081605
2019-03-14

Receiver and noise squelch control method

 #21
20180323755
2018-11-08

Single knob pre-amplifier gain-trim and fader

 #22
20180254760
2018-09-06

Method and apparatus for adaptive transmit power control

 #23
20170111070
2017-04-20

Wireless receiver

 #24
20170111068
2017-04-20

Wireless receiver

 #25
20170026014
2017-01-26

Method and apparatus for adaptive transmit power control

 #26
20160057549
2016-02-25

Method and system for providing hearing assistance to a user

 #27
20150236733
2015-08-20

Method and apparatus for improving audio reception in a paging device

 #28
20130029622
2013-01-31

Squelch detector circuit and method

 #29
20120308050
2012-12-06

Efficiency optimizer of an audio power amplifier for car radio

 #30
20110312291
2011-12-22

Frequency modulated broadcasts

 #31
20110002481
2011-01-06

Audio signal amplitude adjusting device and method

 #32
20100233985
2010-09-16

Systems and methods for receiving and processing multiple carrier communications and navigation signals

 #33
20100130149
2010-05-27

Integrated squelch circuit with programmable engagement threshold

 #34
20100020985
2010-01-28

METHOD AND APPARATUS FOR REDUCING AUDIO ARTIFACTS

 #35
20080233915
2008-09-25

Signal processing circuit comprising an attenuating unit, a detecting unit, and an attenuation rate setting unit

 #36
20080182536
2008-07-31

Threshold adjustable transmission envelope detector

 #37
20080075301
2008-03-27

Muting circuit

 #38
20070275685
2007-11-29

Method and apparatus for squelch gating a receiving signal

 #39
20070275678
2007-11-29

Method and apparatus for leveling an increasing or decreasing slope of an AM modulated receiving signal

 #40
20070225839
2007-09-27

Apparatus and method for processing audio data

 #41
20070173216
2007-07-26

Method and circuit for squelch detection in serial communications

 #42
20070036368
2007-02-15

Differentiated audio

 #43
20060153394
2006-07-13

Headset audio bypass apparatus and method

 #44
20060121866
2006-06-08

Squelch circuit and communication apparatus used with the same

 #45
16040179
2019-08-13

Vehicle radio interference sensor device

 #46
15899135
2019-01-08

Auto level in digital radio systems