JPS56124132A - Tracking control circuit for optical disc - Google Patents

Tracking control circuit for optical disc

Info

Publication number
JPS56124132A
JPS56124132A JP2508280A JP2508280A JPS56124132A JP S56124132 A JPS56124132 A JP S56124132A JP 2508280 A JP2508280 A JP 2508280A JP 2508280 A JP2508280 A JP 2508280A JP S56124132 A JPS56124132 A JP S56124132A
Authority
JP
Japan
Prior art keywords
control circuit
optical disc
beam light
sample
tracking control
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
JP2508280A
Other languages
Japanese (ja)
Other versions
JPS641856B2 (en
Inventor
Masafumi Yokota
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 JP2508280A priority Critical patent/JPS56124132A/en
Priority to US06/237,260 priority patent/US4408314A/en
Priority to EP81101378A priority patent/EP0035236B1/en
Priority to DE8181101378T priority patent/DE3167369D1/en
Publication of JPS56124132A publication Critical patent/JPS56124132A/en
Publication of JPS641856B2 publication Critical patent/JPS641856B2/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
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To obtain a tracking signal which is not affected by the recording beam light, by holding the output of the photodetector in the signal just before the radiation time of the recording beam light during this time, in the tracking control circuit of the optical disc device. CONSTITUTION:Photodetectors 181 and 182 are arranged in the radius direction of the disc, and respective outputs are led to sample holding circuits 231 and 232 and are sample-held in values just before the radiation time of the recording beam light at the period of the recording information pulse. Outputs of respective sample hold circuits have envelopes detected by envelope detectors 261 and 262, and their difference is outputted by comparator 27 and is used as a tracking signal. At the reproducing time, sample holding circuits are by-passed.
JP2508280A 1980-02-29 1980-02-29 Tracking control circuit for optical disc Granted JPS56124132A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2508280A JPS56124132A (en) 1980-02-29 1980-02-29 Tracking control circuit for optical disc
US06/237,260 US4408314A (en) 1980-02-29 1981-02-23 Record/playback track tracking servo
EP81101378A EP0035236B1 (en) 1980-02-29 1981-02-25 Tracking servo control device
DE8181101378T DE3167369D1 (en) 1980-02-29 1981-02-25 Tracking servo control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2508280A JPS56124132A (en) 1980-02-29 1980-02-29 Tracking control circuit for optical disc

Publications (2)

Publication Number Publication Date
JPS56124132A true JPS56124132A (en) 1981-09-29
JPS641856B2 JPS641856B2 (en) 1989-01-12

Family

ID=12155998

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2508280A Granted JPS56124132A (en) 1980-02-29 1980-02-29 Tracking control circuit for optical disc

Country Status (1)

Country Link
JP (1) JPS56124132A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5933638A (en) * 1982-08-16 1984-02-23 Hitachi Ltd Information recording and reproducing system
JPS62164228A (en) * 1986-01-14 1987-07-20 Matsushita Electric Ind Co Ltd Track jump detecting device
WO1990016065A1 (en) * 1989-06-20 1990-12-27 Sony Corporation Optical recorder
JPH03130015U (en) * 1990-04-04 1991-12-26

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5933638A (en) * 1982-08-16 1984-02-23 Hitachi Ltd Information recording and reproducing system
JPH0419613B2 (en) * 1982-08-16 1992-03-31 Hitachi Ltd
JPS62164228A (en) * 1986-01-14 1987-07-20 Matsushita Electric Ind Co Ltd Track jump detecting device
JPH0727648B2 (en) * 1986-01-14 1995-03-29 松下電器産業株式会社 Track skip detector
WO1990016065A1 (en) * 1989-06-20 1990-12-27 Sony Corporation Optical recorder
JPH03130015U (en) * 1990-04-04 1991-12-26

Also Published As

Publication number Publication date
JPS641856B2 (en) 1989-01-12

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