JPS56164679A - Synchronizing signal processing circuit - Google Patents

Synchronizing signal processing circuit

Info

Publication number
JPS56164679A
JPS56164679A JP6743080A JP6743080A JPS56164679A JP S56164679 A JPS56164679 A JP S56164679A JP 6743080 A JP6743080 A JP 6743080A JP 6743080 A JP6743080 A JP 6743080A JP S56164679 A JPS56164679 A JP S56164679A
Authority
JP
Japan
Prior art keywords
synchronizing signal
circuit
horizontal
cut
frequencies
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
JP6743080A
Other languages
Japanese (ja)
Inventor
Shigeharu Eguri
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.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan 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 Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Priority to JP6743080A priority Critical patent/JPS56164679A/en
Publication of JPS56164679A publication Critical patent/JPS56164679A/en
Pending 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 reject unnecessary frequency components and to avoid the effect of noise, by connecting a low pass filter which cut-off the frequencies among 10- 20fh(horizontal scanning frequencies) between a video signal input terminal and a synchronizing separating circuit. CONSTITUTION:In a synchronizing signal processing circuit, between a video signal input terminal 1 and a synchronizing separation circuit 2, a low pass filter 7 which cut-off the frequencies between 10-20fh is connected. Thus, a horizontal synchronizing signal component only can pass through and the frequency component more than the cut-off frequency is rejected. Further, since only one polarity is picked up by adding or subtracting the output of the circuit 2 in the reversed polarity for the signal delaying 1/2 period of pulse width of the horizontal synchronizing signal, the horizontal synchronizing signal with the same pulse width as the equivalent pulse over the entire scanning period is obtained and the AFC sensitivity of the pulse width horizontal AFC circuit is made constant for the entire scanning period.
JP6743080A 1980-05-21 1980-05-21 Synchronizing signal processing circuit Pending JPS56164679A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6743080A JPS56164679A (en) 1980-05-21 1980-05-21 Synchronizing signal processing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6743080A JPS56164679A (en) 1980-05-21 1980-05-21 Synchronizing signal processing circuit

Publications (1)

Publication Number Publication Date
JPS56164679A true JPS56164679A (en) 1981-12-17

Family

ID=13344679

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6743080A Pending JPS56164679A (en) 1980-05-21 1980-05-21 Synchronizing signal processing circuit

Country Status (1)

Country Link
JP (1) JPS56164679A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2644025A1 (en) * 1989-03-03 1990-09-07 Thomson Csf Device for extracting "3 state" pulses in a noisy medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2644025A1 (en) * 1989-03-03 1990-09-07 Thomson Csf Device for extracting "3 state" pulses in a noisy medium

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