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CA2029719A1 - Appareil de lecture de disques optiques - Google Patents

Appareil de lecture de disques optiques

Info

Publication number
CA2029719A1
CA2029719A1 CA2029719A CA2029719A CA2029719A1 CA 2029719 A1 CA2029719 A1 CA 2029719A1 CA 2029719 A CA2029719 A CA 2029719A CA 2029719 A CA2029719 A CA 2029719A CA 2029719 A1 CA2029719 A1 CA 2029719A1
Authority
CA
Canada
Prior art keywords
agc circuit
output
optical disc
reproducing apparatus
signal
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
CA2029719A
Other languages
English (en)
Other versions
CA2029719C (fr
Inventor
Motoshi Ito
Shunji Ohara
Kenzo Ishibashi
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
Individual
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 Individual filed Critical Individual
Publication of CA2029719A1 publication Critical patent/CA2029719A1/fr
Application granted granted Critical
Publication of CA2029719C publication Critical patent/CA2029719C/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G11B7/0941—Methods and circuits for servo gain or phase compensation during operation
    • 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
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
    • G11B7/08517—Methods for track change, selection or preliminary positioning by moving the head with tracking pull-in only

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
CA002029719A 1989-11-20 1990-11-09 Appareil de lecture de disques optiques Expired - Lifetime CA2029719C (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1-301696 1989-11-20
JP1301696A JP2600402B2 (ja) 1989-11-20 1989-11-20 光ディスク信号再生装置

Publications (2)

Publication Number Publication Date
CA2029719A1 true CA2029719A1 (fr) 1991-05-21
CA2029719C CA2029719C (fr) 1995-08-15

Family

ID=17900051

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002029719A Expired - Lifetime CA2029719C (fr) 1989-11-20 1990-11-09 Appareil de lecture de disques optiques

Country Status (5)

Country Link
US (1) US5128911A (fr)
EP (1) EP0429045B1 (fr)
JP (1) JP2600402B2 (fr)
CA (1) CA2029719C (fr)
DE (1) DE69027096T2 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6141300A (en) 1989-06-20 2000-10-31 Discovision Associates Optical actuator including lens assembly with optical axis having symmetric suspensory forces acting thereon and optical disc system including same
US5265079A (en) 1991-02-15 1993-11-23 Applied Magnetics Corporation Seek actuator for optical recording
US6069857A (en) 1991-02-15 2000-05-30 Discovision Associates Optical disc system having improved circuitry for performing blank sector check on readable disc
US5729511A (en) 1991-02-15 1998-03-17 Discovision Associates Optical disc system having servo motor and servo error detection assembly operated relative to monitored quad sum signal
US5677899A (en) 1991-02-15 1997-10-14 Discovision Associates Method for moving carriage assembly from initial position to target position relative to storage medium
US6236625B1 (en) 1991-02-15 2001-05-22 Discovision Associates Optical disc system having current monitoring circuit with controller for laser driver and method for operating same
EP0565376B1 (fr) * 1992-04-10 1998-07-22 Canon Kabushiki Kaisha Appareil et méthode d'enregistrement d'informations optiques capable d'utiliser des supports d'enregistrements en forme de carte avec des réflexions différentes
JP3039900B2 (ja) * 1993-03-15 2000-05-08 キヤノン株式会社 光磁気ディスクドライブ装置
JP2944411B2 (ja) * 1994-03-22 1999-09-06 三洋電機株式会社 ピット／グルーブ判別回路
US5528577A (en) * 1994-10-19 1996-06-18 Sony Corporation Apparatus and method for reading at least partially unmetallized optical discs
US5748578A (en) 1995-01-25 1998-05-05 Discovision Associates Colpitts type oscillator having reduced ringing and improved optical disc system utilizing same
US6091684A (en) 1995-01-25 2000-07-18 Discovision Associates Optical disc system and method for changing the rotational rate of an information storage medium
US6434087B1 (en) 1995-01-25 2002-08-13 Discovision Associates Optical disc system and method for controlling bias coil and light source to process information on a storage medium
KR100206334B1 (ko) * 1996-02-26 1999-07-01 윤종용 신호처리를 위한 광디스크의 프리앰프
DE19715275A1 (de) * 1997-04-12 1998-10-15 Thomson Brandt Gmbh Gerät zum Beschreiben oder Lesen optischer Aufzeichnungsträger
KR100492999B1 (ko) * 1998-04-10 2005-09-02 삼성전자주식회사 광학계 서보 시스템의 미러신호 발생 장치
TW200512746A (en) * 2003-09-18 2005-04-01 Mediatek Inc Control circuit for automatic gain control device of optical disc player
JP4603611B2 (ja) * 2006-03-09 2010-12-22 日本電気株式会社 光ディスク装置及び光ディスク媒体の欠陥検出方法
JPWO2009001499A1 (ja) * 2007-06-28 2010-08-26 パナソニック株式会社 光ディスク用信号処理装置、光ディスク再生記録装置、および光ディスク用信号処理方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4340950A (en) * 1979-10-12 1982-07-20 Universal Pioneer Corporation Video disc player
DE3367134D1 (en) * 1982-05-31 1986-11-27 Hitachi Ltd Servo circuit for a signal reproducing apparatus
JPS59185077A (ja) * 1983-04-05 1984-10-20 Pioneer Electronic Corp トラツキングサ−ボ引込装置
JPS61250849A (ja) * 1985-04-30 1986-11-07 Olympus Optical Co Ltd 光学的情報記録再生装置
JPS6439633A (en) * 1987-08-04 1989-02-09 Mitsubishi Electric Corp Method for driving recording medium
JP2589824B2 (ja) * 1989-09-14 1997-03-12 シャープ株式会社 光メモリ装置のオートゲインコントロール装置

Also Published As

Publication number Publication date
EP0429045A3 (en) 1992-01-08
DE69027096T2 (de) 1997-01-23
CA2029719C (fr) 1995-08-15
US5128911A (en) 1992-07-07
DE69027096D1 (de) 1996-06-27
JP2600402B2 (ja) 1997-04-16
EP0429045A2 (fr) 1991-05-29
JPH03162722A (ja) 1991-07-12
EP0429045B1 (fr) 1996-05-22

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKEC Expiry (correction)

Effective date: 20121202