JPS5778292A - Color gain variable circuit - Google Patents

Color gain variable circuit

Info

Publication number
JPS5778292A
JPS5778292A JP14186181A JP14186181A JPS5778292A JP S5778292 A JPS5778292 A JP S5778292A JP 14186181 A JP14186181 A JP 14186181A JP 14186181 A JP14186181 A JP 14186181A JP S5778292 A JPS5778292 A JP S5778292A
Authority
JP
Japan
Prior art keywords
demodulator
comparator
gain variable
variable circuit
color gain
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP14186181A
Other languages
Japanese (ja)
Other versions
JPS6261198B2 (en
Inventor
Nobukazu Hosoya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
Sanyo Denki Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Sanyo Denki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sanyo Electric Co Ltd, Sanyo Denki Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP14186181A priority Critical patent/JPS5778292A/en
Publication of JPS5778292A publication Critical patent/JPS5778292A/en
Publication of JPS6261198B2 publication Critical patent/JPS6261198B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/70—Circuits for processing colour signals for colour killing
    • H04N9/71—Circuits for processing colour signals for colour killing combined with colour gain control

Abstract

PURPOSE:To prevent the effect of noise component, by making level comparison at a comparator for the color burst period output of the B-Y demodulator output, R-Y or G-Y demodulator output at a comparator and obtaining a control signal. CONSTITUTION:In a color gain variable circuit, as an input signal of a circuit 17 detecting an ACC signal, the outputs of a B-Y demodulator 7, R-Y demodulator 5 or G-Y demodulator 6 are used and a control signal is obtained by the amplitude comparison of the two. Thus, since noise is given to a comparator from the demodulators 7, 5, or 6, they are cancelled by each other, and no noise is superimposed on the ACC signal, allowing to avoid malfunction.
JP14186181A 1981-09-08 1981-09-08 Color gain variable circuit Granted JPS5778292A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14186181A JPS5778292A (en) 1981-09-08 1981-09-08 Color gain variable circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14186181A JPS5778292A (en) 1981-09-08 1981-09-08 Color gain variable circuit

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP55127581A Division JPS5752288A (en) 1980-09-11 1980-09-11 Color gain variable circuit

Publications (2)

Publication Number Publication Date
JPS5778292A true JPS5778292A (en) 1982-05-15
JPS6261198B2 JPS6261198B2 (en) 1987-12-19

Family

ID=15301865

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14186181A Granted JPS5778292A (en) 1981-09-08 1981-09-08 Color gain variable circuit

Country Status (1)

Country Link
JP (1) JPS5778292A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6194488A (en) * 1984-10-15 1986-05-13 Matsushita Electric Ind Co Ltd Chrominance components processing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6194488A (en) * 1984-10-15 1986-05-13 Matsushita Electric Ind Co Ltd Chrominance components processing device
JPH058630B2 (en) * 1984-10-15 1993-02-02 Matsushita Electric Ind Co Ltd

Also Published As

Publication number Publication date
JPS6261198B2 (en) 1987-12-19

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