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JPS642484A - Clock synchronizing circuit of sampling rate converting circuit - Google Patents

Clock synchronizing circuit of sampling rate converting circuit

Info

Publication number
JPS642484A
JPS642484A JP62158349A JP15834987A JPS642484A JP S642484 A JPS642484 A JP S642484A JP 62158349 A JP62158349 A JP 62158349A JP 15834987 A JP15834987 A JP 15834987A JP S642484 A JPS642484 A JP S642484A
Authority
JP
Japan
Prior art keywords
variable oscillator
circuit
variable
oscillation
oscillation frequency
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
JP62158349A
Other languages
Japanese (ja)
Other versions
JPH012484A (en
JP2508443B2 (en
Inventor
Tadao Fujita
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP62158349A priority Critical patent/JP2508443B2/en
Publication of JPH012484A publication Critical patent/JPH012484A/en
Publication of JPS642484A publication Critical patent/JPS642484A/en
Application granted granted Critical
Publication of JP2508443B2 publication Critical patent/JP2508443B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Television Systems (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

PURPOSE: To obtain 1st and 2nd clock signals of highly accurate frequency by supplying the output of a 1st phase-controlled variable oscillator and the output of a 2nd variable oscillator to a 2nd phase comparator for phase comparison and controlling the oscillation frequency of the 2nd variable oscillator.
CONSTITUTION: The 1st variable oscillator 5 which has an oscillation frequency equal to a 1st sampling frequency and the 2nd variable oscillator 12 which has the oscillation frequency equal to a 2nd sampling frequency are provided and the oscillation output of the variable oscillator 5 is compared by a 1st phase comparator 3 or 1 with the synchronizing signal of a 1st digital video signal to control the oscillation frequency of the 1st variable oscillator 5. Both oscillation outputs of variable oscillators 5 and 12 are compared by a 2nd phase comparator 10 to control the oscillation frequency of the 2nd variable oscillator 12, and the 1st and 2nd clock signals are obtained from the variable oscillators 5 and 12.
COPYRIGHT: (C)1989,JPO&Japio
JP62158349A 1987-06-25 1987-06-25 Clock synchronization circuit for sampling rate conversion circuit Expired - Fee Related JP2508443B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62158349A JP2508443B2 (en) 1987-06-25 1987-06-25 Clock synchronization circuit for sampling rate conversion circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62158349A JP2508443B2 (en) 1987-06-25 1987-06-25 Clock synchronization circuit for sampling rate conversion circuit

Publications (3)

Publication Number Publication Date
JPH012484A JPH012484A (en) 1989-01-06
JPS642484A true JPS642484A (en) 1989-01-06
JP2508443B2 JP2508443B2 (en) 1996-06-19

Family

ID=15669705

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62158349A Expired - Fee Related JP2508443B2 (en) 1987-06-25 1987-06-25 Clock synchronization circuit for sampling rate conversion circuit

Country Status (1)

Country Link
JP (1) JP2508443B2 (en)

Also Published As

Publication number Publication date
JP2508443B2 (en) 1996-06-19

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees