JPS56160190A - Reproducing circuit of carrier chrominance signal - Google Patents

Reproducing circuit of carrier chrominance signal

Info

Publication number
JPS56160190A
JPS56160190A JP5687980A JP5687980A JPS56160190A JP S56160190 A JPS56160190 A JP S56160190A JP 5687980 A JP5687980 A JP 5687980A JP 5687980 A JP5687980 A JP 5687980A JP S56160190 A JPS56160190 A JP S56160190A
Authority
JP
Japan
Prior art keywords
circuit
control signal
supplied
signal
level
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.)
Pending
Application number
JP5687980A
Other languages
Japanese (ja)
Inventor
Ichitaro Sato
Sadao Hosoi
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP5687980A priority Critical patent/JPS56160190A/en
Publication of JPS56160190A publication Critical patent/JPS56160190A/en
Pending 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
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/793—Processing of colour television signals in connection with recording for controlling the level of the chrominance signal, e.g. by means of automatic chroma control circuits

Abstract

PURPOSE:To ensure a constant level for a reproduced carrier chrominance signal although a relative mechanical fluctuation exists to a recording medium such as a magnetic tape, etc., by controlling the gain of a variable gain circuit that is put into the transmission system based on the level detection output of an ACC control signal and a reproduced high frequency signal each. CONSTITUTION:In the transmission system of the carrier chrominance signal, a variable gain circuit 8 is put in between an LPF3 and a frequency reverse converting circuit 9. The ACC control signal supplied from a control signal generating circuit 21 comprising a burst gate circuit 10 and an AM wave detecting circuit 14 is supplied to the circuit 8. On the other hand, a luminance signal to be FM-modulated supplied from an HPF2 is supplied to a potentiometer 18 after an envelope curve wave detection 23. Thus the level of the luminance signal is made variable. The detection output of a level detecting circuit 22 which is obtained by supplying the output of the potentiometer 18 to the base of a transistor 17 is superposed on the ACC control signal to obtain the gain control signal of the circuit 8.
JP5687980A 1980-04-29 1980-04-29 Reproducing circuit of carrier chrominance signal Pending JPS56160190A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5687980A JPS56160190A (en) 1980-04-29 1980-04-29 Reproducing circuit of carrier chrominance signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5687980A JPS56160190A (en) 1980-04-29 1980-04-29 Reproducing circuit of carrier chrominance signal

Publications (1)

Publication Number Publication Date
JPS56160190A true JPS56160190A (en) 1981-12-09

Family

ID=13039694

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5687980A Pending JPS56160190A (en) 1980-04-29 1980-04-29 Reproducing circuit of carrier chrominance signal

Country Status (1)

Country Link
JP (1) JPS56160190A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60201791A (en) * 1984-03-26 1985-10-12 Sony Corp Reproduction circuit of video tape recorder
EP0309287A2 (en) * 1987-09-24 1989-03-29 Kabushiki Kaisha Toshiba Data reproducing apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60201791A (en) * 1984-03-26 1985-10-12 Sony Corp Reproduction circuit of video tape recorder
EP0309287A2 (en) * 1987-09-24 1989-03-29 Kabushiki Kaisha Toshiba Data reproducing apparatus

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