JPS5525852A - Automatic adjuster circuit for reading pulse phase - Google Patents

Automatic adjuster circuit for reading pulse phase

Info

Publication number
JPS5525852A
JPS5525852A JP9837778A JP9837778A JPS5525852A JP S5525852 A JPS5525852 A JP S5525852A JP 9837778 A JP9837778 A JP 9837778A JP 9837778 A JP9837778 A JP 9837778A JP S5525852 A JPS5525852 A JP S5525852A
Authority
JP
Japan
Prior art keywords
circuit
output
phase
reading pulse
optimum phase
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
JP9837778A
Other languages
Japanese (ja)
Other versions
JPS6334545B2 (en
Inventor
Masaru Nishimura
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP9837778A priority Critical patent/JPS5525852A/en
Publication of JPS5525852A publication Critical patent/JPS5525852A/en
Publication of JPS6334545B2 publication Critical patent/JPS6334545B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE: To secure an automatic adjustment of the reading pulse to the optimum phase by regarding the reading pulse phase featuring the munimum code error detecting frequency as the optimum phase.
CONSTITUTION: The error current value read out via reading address designation circuit 20 and memorized in memory circuit 11 is supplied sequentially to minumum value detection circuit 21, and only the minimum value is sent to reference error number setting circuit 22 to be added with a fixed number and then turned to the reference error number. The output of comparator 23 comparing the reference error number with the error count number holds the count value of counter circuit 24 relating phases corresponding to the fall and rise time at detection circuits 25 and 26 of the domain start and terminal each. In this connection, the output of differentiating circuit 27 and the differential inverse outlut of the comparison output are applied to circuits 25 and 26, and the output of the both circuits are supplied to phase setting circuit 28 via arithmetic mean calculatlation circuit 27 to be converted into the digital value of the control voltage corresponding to the optimum phase. As a result, an automatic adjustment is ensured for the reading pulse to the optimum phase.
COPYRIGHT: (C)1980,JPO&Japio
JP9837778A 1978-08-10 1978-08-10 Automatic adjuster circuit for reading pulse phase Granted JPS5525852A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9837778A JPS5525852A (en) 1978-08-10 1978-08-10 Automatic adjuster circuit for reading pulse phase

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9837778A JPS5525852A (en) 1978-08-10 1978-08-10 Automatic adjuster circuit for reading pulse phase

Publications (2)

Publication Number Publication Date
JPS5525852A true JPS5525852A (en) 1980-02-23
JPS6334545B2 JPS6334545B2 (en) 1988-07-11

Family

ID=14218176

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9837778A Granted JPS5525852A (en) 1978-08-10 1978-08-10 Automatic adjuster circuit for reading pulse phase

Country Status (1)

Country Link
JP (1) JPS5525852A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58164011A (en) * 1982-03-23 1983-09-28 Hitachi Denshi Ltd Automatic adjusting device of data discriminating phase
JPH01159873A (en) * 1987-12-17 1989-06-22 Pioneer Electron Corp Method for recording and reproducing data

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58164011A (en) * 1982-03-23 1983-09-28 Hitachi Denshi Ltd Automatic adjusting device of data discriminating phase
JPH01159873A (en) * 1987-12-17 1989-06-22 Pioneer Electron Corp Method for recording and reproducing data

Also Published As

Publication number Publication date
JPS6334545B2 (en) 1988-07-11

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