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JPS6429078A - Bco device - Google Patents

Bco device

Info

Publication number
JPS6429078A
JPS6429078A JP18480687A JP18480687A JPS6429078A JP S6429078 A JPS6429078 A JP S6429078A JP 18480687 A JP18480687 A JP 18480687A JP 18480687 A JP18480687 A JP 18480687A JP S6429078 A JPS6429078 A JP S6429078A
Authority
JP
Japan
Prior art keywords
counter
phase
subcarrier
front edge
crystal oscillator
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
JP18480687A
Other languages
Japanese (ja)
Inventor
Hideki Takimoto
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP18480687A priority Critical patent/JPS6429078A/en
Publication of JPS6429078A publication Critical patent/JPS6429078A/en
Pending legal-status Critical Current

Links

Landscapes

  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE:To shorten loop response time by latching a signal down-counted by a counter reset at the front edge of a color burst signal, and comparing its phase with that of the color burst signal. CONSTITUTION:An output from a crystal oscillator 7 is inputted to the counter 9 via an inverting circuit 8. The counter 9 down-counts this input, and is reset at the front edge of one-cycle burst. A latch circuit 10 latches an output form the counter 9, and outputs it to a phase comparator 11 and an output terminal 12 as a subcarrier. The phase comparator 11 detects the phase difference between the one-cycle burst and the subcarrier, and feeds back its result to the crystal oscillator 7 to control its oscillating frequency.
JP18480687A 1987-07-23 1987-07-23 Bco device Pending JPS6429078A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18480687A JPS6429078A (en) 1987-07-23 1987-07-23 Bco device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18480687A JPS6429078A (en) 1987-07-23 1987-07-23 Bco device

Publications (1)

Publication Number Publication Date
JPS6429078A true JPS6429078A (en) 1989-01-31

Family

ID=16159619

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18480687A Pending JPS6429078A (en) 1987-07-23 1987-07-23 Bco device

Country Status (1)

Country Link
JP (1) JPS6429078A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04890A (en) * 1990-04-17 1992-01-06 Matsushita Electric Ind Co Ltd Color subcarrier generator
EP0512861A2 (en) * 1991-05-09 1992-11-11 Nintendo Co. Limited Color video signal standard conversion apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04890A (en) * 1990-04-17 1992-01-06 Matsushita Electric Ind Co Ltd Color subcarrier generator
EP0512861A2 (en) * 1991-05-09 1992-11-11 Nintendo Co. Limited Color video signal standard conversion apparatus
EP0512861A3 (en) * 1991-05-09 1994-08-17 Nintendo Co Ltd Color video signal standard conversion apparatus

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