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Automatic gain control

Automatic gain control (AGC), sometimes Automatic volume control (AVC) is a closed-loop feedback regulating circuit in an amplifier or chain of amplifiers, the purpose of which is to maintain a suitable signal amplitude at its output, despite variation of the signal amplitude at the input. The average or peak output signal level is used to dynamically…

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Harold Alden WheelerRadio-frequencyKarl KüpfmüllerElectronics magazineTerman
43 related topics

How it works

DiodeCapacitor
2 related topics

Recovery times

Full break-in
1 related topics

Overview

FeedbackAmplifierGainRadio receiversLoudness
10 related topics

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Automatic gain control

Nodes61
Edges60
Triples40
Avg. degree1.97
Density0.032787
Components1

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Automatic gain control

Top relations

related to AM radio receivers · 18
Automatic gain control → AGC, Although, AM, AVC, By, DC, Electronics, Harold Alden Wheeler, He, IF, In, Karl Küpfmüller, Patent, Properly, RF, The, Wheeler, Wheeler’s AVC
related to Biological · 5
Automatic gain control → As, For, Further, Similarly, V1
related to Telephone recording · 2
Automatic gain control → Devices, Some

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Important terminology

signal gain agc control time level radio modulation automatic rf stages circuit used receiver recording receivers voltage avc output average

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
delayed AVC loadinginstance ofThe Radiotron Designer’s Handbook discusses effects0.80text
detector impedance interactionsinstance ofThe Radiotron Designer’s Handbook discusses effects0.80text
and inappropriate time-constant selectioninstance ofThe Radiotron Designer’s Handbook discusses effects0.80text
all of which can impair fidelity if not properly designedinstance ofThe Radiotron Designer’s Handbook discusses effects0.80text
classical musicinstance ofSimilar considerations apply with VCRs.A potential disadvantage of AGC is that when recording something like music with quiet and loud passages0.80text
the AGC will tend to make the quiet passages louderinstance ofSimilar considerations apply with VCRs.A potential disadvantage of AGC is that when recording something like music with quiet and loud passages0.80text
the loud passages quieterinstance ofSimilar considerations apply with VCRs.A potential disadvantage of AGC is that when recording something like music with quiet and loud passages0.80text
compressing the dynamic rangeinstance ofSimilar considerations apply with VCRs.A potential disadvantage of AGC is that when recording something like music with quiet and loud passages0.80text
Macrovision exploit thisinstance ofVideo copy control schemes0.80text
inserting spikes in the pulse which will be ignored by most television setsinstance ofVideo copy control schemes0.80text
but cause a VCR's AGC to overcorrectinstance ofVideo copy control schemes0.80text
corrupt the recording.VogadA voice-operated gain-adjusting device or volume-operated gain-adjusting deviceinstance ofVideo copy control schemes0.80text

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