DE69020398T2 - Digitales Servosteuergerät. - Google Patents

Digitales Servosteuergerät.

Info

Publication number
DE69020398T2
DE69020398T2 DE69020398T DE69020398T DE69020398T2 DE 69020398 T2 DE69020398 T2 DE 69020398T2 DE 69020398 T DE69020398 T DE 69020398T DE 69020398 T DE69020398 T DE 69020398T DE 69020398 T2 DE69020398 T2 DE 69020398T2
Authority
DE
Germany
Prior art keywords
control unit
servo control
digital servo
digital
unit
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.)
Expired - Fee Related
Application number
DE69020398T
Other languages
English (en)
Other versions
DE69020398D1 (de
Inventor
Tsukasa Ogino
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Application granted granted Critical
Publication of DE69020398D1 publication Critical patent/DE69020398D1/de
Publication of DE69020398T2 publication Critical patent/DE69020398T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0945—Methods for initialising servos, start-up sequences
    • 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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0901—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following only
    • 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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
DE69020398T 1989-03-28 1990-03-26 Digitales Servosteuergerät. Expired - Fee Related DE69020398T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP7399989 1989-03-28
JP2064306A JPH0348308A (ja) 1989-03-28 1990-03-16 デジタルサーボ制御装置

Publications (2)

Publication Number Publication Date
DE69020398D1 DE69020398D1 (de) 1995-08-03
DE69020398T2 true DE69020398T2 (de) 1995-11-09

Family

ID=26405423

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69020398T Expired - Fee Related DE69020398T2 (de) 1989-03-28 1990-03-26 Digitales Servosteuergerät.

Country Status (4)

Country Link
US (1) US5448542A (de)
EP (1) EP0390467B1 (de)
JP (1) JPH0348308A (de)
DE (1) DE69020398T2 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5646797A (en) * 1990-09-18 1997-07-08 Rodime Plc Digital servo control system for use in disk drives
US5249116A (en) * 1991-02-28 1993-09-28 U.S. Philips Corporation Digital control system and a sub-circuit to be used in the control system
KR100272118B1 (ko) * 1991-11-06 2000-11-15 이데이 노부유끼 디지탈 서보 제어 회로를 구비한 광디스크 플레이어 및 트래킹 서보 회로
JPH10214451A (ja) * 1997-01-29 1998-08-11 Alpine Electron Inc デジタルディスクプレーヤ
JP2002124047A (ja) * 2000-10-11 2002-04-26 Sony Corp 磁気ディスク装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4907214A (en) * 1985-12-18 1990-03-06 Kabushiki Kaisha Toshiba Eccentricity correction apparatus for an optical disk device
JPS62293522A (ja) * 1986-06-13 1987-12-21 Pioneer Electronic Corp 記録デイスク再生装置
JPS62298931A (ja) * 1986-06-18 1987-12-26 Sony Corp 光デイスクに対するデジタルサ−ボ方式
DE3783114T2 (de) * 1986-09-20 1993-04-22 Pioneer Electronic Corp Servomechanismus fuer eine aufzeichnungsplatte-wiedergabeanordnung.
JPS63213126A (ja) * 1987-02-27 1988-09-06 Nec Corp 光デイスク装置
JPH0821210B2 (ja) * 1987-07-09 1996-03-04 日本電気株式会社 位置誤差補償方式
JP2557896B2 (ja) * 1987-07-31 1996-11-27 株式会社東芝 ディスク装置
NL8702261A (nl) * 1987-09-23 1989-04-17 Philips Nv Informatie opteken en/of uitlees systeem, alsmede een registratiedrager en opteken en/of uitleesinrichting voor toepassing in een dergelijk systeem.
JPH0782721B2 (ja) * 1988-10-05 1995-09-06 パイオニア株式会社 ディスクプレーヤのサーボ装置
US5235577A (en) * 1989-11-02 1993-08-10 Canon Kabushiki Kaisha Information recording and/or reproducing apparatus for timing switching of a jumping pulse from an intermittently detected tracking signal

Also Published As

Publication number Publication date
US5448542A (en) 1995-09-05
JPH0348308A (ja) 1991-03-01
EP0390467B1 (de) 1995-06-28
DE69020398D1 (de) 1995-08-03
EP0390467A3 (de) 1991-03-27
EP0390467A2 (de) 1990-10-03

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee