JPS5773584A - Phase synchronizing circuit - Google Patents

Phase synchronizing circuit

Info

Publication number
JPS5773584A
JPS5773584A JP55149350A JP14935080A JPS5773584A JP S5773584 A JPS5773584 A JP S5773584A JP 55149350 A JP55149350 A JP 55149350A JP 14935080 A JP14935080 A JP 14935080A JP S5773584 A JPS5773584 A JP S5773584A
Authority
JP
Japan
Prior art keywords
error
pedestal level
circuit
converter
operating
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
JP55149350A
Other languages
Japanese (ja)
Inventor
Masaaki Kato
Keisuke Ogi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP55149350A priority Critical patent/JPS5773584A/en
Publication of JPS5773584A publication Critical patent/JPS5773584A/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
    • H04N9/44—Colour synchronisation

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Color Television Systems (AREA)

Abstract

PURPOSE:To constitute an error operating circuit with low-speed elements by operating an error only with a digital signal outputted in every period of color subcarrier wave. CONSTITUTION:A closed loop composed of an A/D converter 11, a burst extracting circuit 14, a pedestal level generator 41, a pedestal level error operation circuit 40, a D/A converter 42, a loop filter 43, and an analog adder 44 constitutes a control circuit to clamp the pedestal level of a composite color television signal so as to consist with a targeted value from the pedestal level generator 41, clamping the pedestal level digitally. An error operated by the error operating circuit 45 is applied to the control terminal of a voltage control oscillator 18 through a D/A converter 16 and a loop filter 17.
JP55149350A 1980-10-27 1980-10-27 Phase synchronizing circuit Pending JPS5773584A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55149350A JPS5773584A (en) 1980-10-27 1980-10-27 Phase synchronizing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55149350A JPS5773584A (en) 1980-10-27 1980-10-27 Phase synchronizing circuit

Publications (1)

Publication Number Publication Date
JPS5773584A true JPS5773584A (en) 1982-05-08

Family

ID=15473195

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55149350A Pending JPS5773584A (en) 1980-10-27 1980-10-27 Phase synchronizing circuit

Country Status (1)

Country Link
JP (1) JPS5773584A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63146683A (en) * 1986-12-10 1988-06-18 Mitsubishi Electric Corp Pll error arithmetic circuit
EP0777391A3 (en) * 1995-11-30 1997-09-24 Sanyo Electric Co Apparatus with A/D converter for processing television signal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63146683A (en) * 1986-12-10 1988-06-18 Mitsubishi Electric Corp Pll error arithmetic circuit
EP0777391A3 (en) * 1995-11-30 1997-09-24 Sanyo Electric Co Apparatus with A/D converter for processing television signal
US6201578B1 (en) 1995-11-30 2001-03-13 Sanyo Electric Co., Ltd. Apparatus with A/D converter for processing television signal

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