JPS5641534A - Information recording and regenerative device - Google Patents

Information recording and regenerative device

Info

Publication number
JPS5641534A
JPS5641534A JP11478179A JP11478179A JPS5641534A JP S5641534 A JPS5641534 A JP S5641534A JP 11478179 A JP11478179 A JP 11478179A JP 11478179 A JP11478179 A JP 11478179A JP S5641534 A JPS5641534 A JP S5641534A
Authority
JP
Japan
Prior art keywords
signal
regular width
case
comparator
memory
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
JP11478179A
Other languages
Japanese (ja)
Other versions
JPS6228504B2 (en
Inventor
Noboru Wakami
Masahiro Deguchi
Mitsuro Moriya
Yasuhiro Goto
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 JP11478179A priority Critical patent/JPS5641534A/en
Publication of JPS5641534A publication Critical patent/JPS5641534A/en
Publication of JPS6228504B2 publication Critical patent/JPS6228504B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/10—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following

Landscapes

  • Moving Of The Head To Find And Align With The Track (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:In case of waveform memory of the track distortion shape, to elevate the memory precision by making expansion of the dynamic range unnecessary, by removing its DC portion. CONSTITUTION:The DC value detection circuit 19 inputs the tracking control signal (j) into the window comparator 26 through the time constant filter 25 which can detect the DC portion to some extent, in a state that the final recording information track has been subject to retrieval tracking. The comparator 26 detects whether the DC portion of the signal (j) generated in the filter 25 exists in the regular width or not, and in case it exists in the regular width, the gate signal (p) is output immediately, and waveform memory is made as to the tracking control signal following the track shape distortion of the signal (j). On the other hand, in case the aforesaid DC portion does not exist in the regular width, the rotary angle, etc. of the moving means 24 are controlled by obtaining the signal (q) corresponding to the difference to its regular width through the moving and setting circuit 27 corresponding to the output of the comparator 26. As a result of the foregoing, expansion of the dynamic range becomes unnecessary, and therefore the memory precision can be elevated.
JP11478179A 1979-09-06 1979-09-06 Information recording and regenerative device Granted JPS5641534A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11478179A JPS5641534A (en) 1979-09-06 1979-09-06 Information recording and regenerative device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11478179A JPS5641534A (en) 1979-09-06 1979-09-06 Information recording and regenerative device

Publications (2)

Publication Number Publication Date
JPS5641534A true JPS5641534A (en) 1981-04-18
JPS6228504B2 JPS6228504B2 (en) 1987-06-20

Family

ID=14646511

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11478179A Granted JPS5641534A (en) 1979-09-06 1979-09-06 Information recording and regenerative device

Country Status (1)

Country Link
JP (1) JPS5641534A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0159601U (en) * 1987-10-08 1989-04-14
JPH02115401U (en) * 1989-03-02 1990-09-14

Also Published As

Publication number Publication date
JPS6228504B2 (en) 1987-06-20

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