JPS56169969A - Synchronisum separation circuit - Google Patents

Synchronisum separation circuit

Info

Publication number
JPS56169969A
JPS56169969A JP7467280A JP7467280A JPS56169969A JP S56169969 A JPS56169969 A JP S56169969A JP 7467280 A JP7467280 A JP 7467280A JP 7467280 A JP7467280 A JP 7467280A JP S56169969 A JPS56169969 A JP S56169969A
Authority
JP
Japan
Prior art keywords
signal
amplifier
inputted
output
peak
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
JP7467280A
Other languages
Japanese (ja)
Other versions
JPS6020952B2 (en
Inventor
Koichi Oota
Susumu Hanaoka
Teruo Kawatsu
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP7467280A priority Critical patent/JPS6020952B2/en
Publication of JPS56169969A publication Critical patent/JPS56169969A/en
Publication of JPS6020952B2 publication Critical patent/JPS6020952B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/08—Separation of synchronising signals from picture signals

Abstract

PURPOSE:To obtain a stable synchronizing signal against level fluctuation, by setting the threshold level of a detecting circuit to the middle point of synchronizing pulses. CONSTITUTION:A TV signal in pedestal clamping inputted to an input terminal 6 is inverted for the phase at an operational amplifier 8 and inputted to a peak detection circuit and a detection circuit. In the peak detection circuit, a peak rectifying taking the synchronizing pulse signal part of the TV signal as the peak value is made. This output is inputted to an operating circuit 9, it is compared with a reference voltage Vs1 and amplified, fed back to an amplifier 8, and an output voltage in which the peak voltage is controlled to a given value is obtained from the amplifier 8. On the other hand, the output signal of an amplifier 9 is inputted also to an operational amplifier 10, and it is compared with a reference voltage Vs2 and amplified. From the amplifier 10, a voltage between the peak value of the synchronizing pulse of the TV signal V0 and the pedestal level is obtained, and it is inputted to a detection circuit 11 as a threshold level. Thus, the signal V0 and the output of the amplifier 10 are given to the circuit 11 to output a stable synchronizing pulse.
JP7467280A 1980-06-03 1980-06-03 Synchronous separation circuit Expired JPS6020952B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7467280A JPS6020952B2 (en) 1980-06-03 1980-06-03 Synchronous separation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7467280A JPS6020952B2 (en) 1980-06-03 1980-06-03 Synchronous separation circuit

Publications (2)

Publication Number Publication Date
JPS56169969A true JPS56169969A (en) 1981-12-26
JPS6020952B2 JPS6020952B2 (en) 1985-05-24

Family

ID=13553946

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7467280A Expired JPS6020952B2 (en) 1980-06-03 1980-06-03 Synchronous separation circuit

Country Status (1)

Country Link
JP (1) JPS6020952B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58205378A (en) * 1982-05-25 1983-11-30 Iwatsu Electric Co Ltd Synchronizing signal separating circuit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01130860U (en) * 1988-03-02 1989-09-06
JPH0388967U (en) * 1989-12-28 1991-09-11

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58205378A (en) * 1982-05-25 1983-11-30 Iwatsu Electric Co Ltd Synchronizing signal separating circuit
JPH0218635B2 (en) * 1982-05-25 1990-04-26 Iwatsu Electric Co Ltd

Also Published As

Publication number Publication date
JPS6020952B2 (en) 1985-05-24

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