JPH0475579B2 - - Google Patents

Info

Publication number
JPH0475579B2
JPH0475579B2 JP59115709A JP11570984A JPH0475579B2 JP H0475579 B2 JPH0475579 B2 JP H0475579B2 JP 59115709 A JP59115709 A JP 59115709A JP 11570984 A JP11570984 A JP 11570984A JP H0475579 B2 JPH0475579 B2 JP H0475579B2
Authority
JP
Japan
Prior art keywords
signal
circuit
tracking error
error signal
level
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 - Lifetime
Application number
JP59115709A
Other languages
English (en)
Japanese (ja)
Other versions
JPS60258737A (ja
Inventor
Takeshi Ito
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
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 Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Priority to JP11570984A priority Critical patent/JPS60258737A/ja
Publication of JPS60258737A publication Critical patent/JPS60258737A/ja
Publication of JPH0475579B2 publication Critical patent/JPH0475579B2/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
    • G11B7/08—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
    • G11B7/094—Methods and circuits for servo offset compensation
    • 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

Landscapes

  • Moving Of The Head To Find And Align With The Track (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
JP11570984A 1984-06-06 1984-06-06 トラツキングサ−ボシステムの信号切換回路 Granted JPS60258737A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11570984A JPS60258737A (ja) 1984-06-06 1984-06-06 トラツキングサ−ボシステムの信号切換回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11570984A JPS60258737A (ja) 1984-06-06 1984-06-06 トラツキングサ−ボシステムの信号切換回路

Publications (2)

Publication Number Publication Date
JPS60258737A JPS60258737A (ja) 1985-12-20
JPH0475579B2 true JPH0475579B2 (pt) 1992-12-01

Family

ID=14669255

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11570984A Granted JPS60258737A (ja) 1984-06-06 1984-06-06 トラツキングサ−ボシステムの信号切換回路

Country Status (1)

Country Link
JP (1) JPS60258737A (pt)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5220546A (en) * 1990-09-28 1993-06-15 International Business Machines Corporation Operating optical disk drives including calibrating a tracking error signal

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5938973A (ja) * 1982-08-28 1984-03-03 Sony Corp デイスク再生装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5938973A (ja) * 1982-08-28 1984-03-03 Sony Corp デイスク再生装置

Also Published As

Publication number Publication date
JPS60258737A (ja) 1985-12-20

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