JPS57155883A - Vertical synchronizing device - Google Patents

Vertical synchronizing device

Info

Publication number
JPS57155883A
JPS57155883A JP4095381A JP4095381A JPS57155883A JP S57155883 A JPS57155883 A JP S57155883A JP 4095381 A JP4095381 A JP 4095381A JP 4095381 A JP4095381 A JP 4095381A JP S57155883 A JPS57155883 A JP S57155883A
Authority
JP
Japan
Prior art keywords
circuit
vertical
frequency
vertical synchronizing
horizontal
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
JP4095381A
Other languages
Japanese (ja)
Other versions
JPS6147027B2 (en
Inventor
Sukeyuki Sato
Namio Yamaguchi
Yuichi Shiotani
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP4095381A priority Critical patent/JPS57155883A/en
Publication of JPS57155883A publication Critical patent/JPS57155883A/en
Publication of JPS6147027B2 publication Critical patent/JPS6147027B2/ja
Granted 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Synchronizing For Television (AREA)

Abstract

PURPOSE:To stabilize vertical synchronism regardless of the level of a noise, by using a peak clamping type vertical synchronizing and separating circuit for a vertical deflecting circuit which uses a vertical and a horizontal oscillating circuit, a frequency dividing circuit, a switching circuit, etc. CONSTITUTION:A vertical synchronizing device is equipped with a vertical oscillator 4 which oscillates synchronizing with a vertical synchronizing signal separated from a TV signal, a horizontal oscillator 8 which oscillates at a frequency as high as a horizontal frequency, a frequency dividing circuit 9 which divides the frequency of its horizontal oscillation output up to a vertical frequency, and a switching circuit 10 which switches and switches and outputs the output of the vertical oscillating circuit 4 and that of the frequency dividing circuit 9 to a vertical deflecting circuit 6. Then, a peak clamping type vertical synchronizing and separating circuit 14 separates the vertical synchronizing signal and when its frequency is lower than a prescribed one, that is detected through a frequency discriminating circuit 13 to supply the output of the frequency dividing circuit 9 from the switching circuit 10. Thus, when a noise level is high, the noise is inverted by an inverter circuit 1 and when low, the vertical synchronizing signal is detected, stabilizing vertical synchronism.
JP4095381A 1981-03-20 1981-03-20 Vertical synchronizing device Granted JPS57155883A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4095381A JPS57155883A (en) 1981-03-20 1981-03-20 Vertical synchronizing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4095381A JPS57155883A (en) 1981-03-20 1981-03-20 Vertical synchronizing device

Publications (2)

Publication Number Publication Date
JPS57155883A true JPS57155883A (en) 1982-09-27
JPS6147027B2 JPS6147027B2 (en) 1986-10-17

Family

ID=12594855

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4095381A Granted JPS57155883A (en) 1981-03-20 1981-03-20 Vertical synchronizing device

Country Status (1)

Country Link
JP (1) JPS57155883A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007094468A (en) * 2005-09-27 2007-04-12 Nohmi Bosai Ltd Equipment for fire alarm system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007094468A (en) * 2005-09-27 2007-04-12 Nohmi Bosai Ltd Equipment for fire alarm system

Also Published As

Publication number Publication date
JPS6147027B2 (en) 1986-10-17

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