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PCE
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Search for IPC and CPC classification codes or keywords
DIFF Subgroup
H04N 5/52

Automatic gain control

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Details of television systems > Receiver circuitry > Automatic gain control

CPC:

Details of television systems (scanning details or combination thereof with generation of supply voltages H04N3/00) > Receiver circuitry (H04N5/14 takes precedence) > Automatic gain control

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

2 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • H04N 5/53 Keyed automatic gain control since 1985 IPC+CPC Available in IPC and CPC
  • H04N 5/54 for positively-modulated picture signals (H04N5/53 takes precedence) IPC+CPC Available in IPC and CPC
  • H04N 5/56 for negatively-modulated picture signals (H04N5/53 takes precedence) IPC+CPC Available in IPC and CPC