JPH03116544A - Track access control circuit for optical disk device - Google Patents

Track access control circuit for optical disk device

Info

Publication number
JPH03116544A
JPH03116544A JP25398189A JP25398189A JPH03116544A JP H03116544 A JPH03116544 A JP H03116544A JP 25398189 A JP25398189 A JP 25398189A JP 25398189 A JP25398189 A JP 25398189A JP H03116544 A JPH03116544 A JP H03116544A
Authority
JP
Japan
Prior art keywords
track
servo
state
time
target track
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.)
Pending
Application number
JP25398189A
Other languages
Japanese (ja)
Inventor
Shigetomo Yanagi
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP25398189A priority Critical patent/JPH03116544A/en
Publication of JPH03116544A publication Critical patent/JPH03116544A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To compatibly provide both of stability and the follow-up characteristic to the track deviation at the time of fine control by lowering a servo band during the prescribed setting time upon switching to an operation state at the arrival at a target track.
CONSTITUTION: The beam of an optical head 12 is made to follow up the target track by the double servo of putting the 1st and 2nd track servo means 18, 10 into a non-operation state and a speed control means 22 into an operation state to move the beam to the target track position by a 2nd track actuator 16 at the time of seeking, then of putting the speed control means 22 into the non-operation state and simultaneously putting the 1st and 2nd track servo means 18, 10 into the operation state at the time of arrival at the target track position. A servo band switching means 26 to lower the servo band during the prescribed setting time upon switching to the operation state at the arrival at the target track and to return the servo band to the original high servo band thereafter is provided in the 2nd track servo means 20 in this case. The stability at the time of the jumping of the fine control and the follow-up characteristic of the track deviation during the fine control are improved in this way.
COPYRIGHT: (C)1991,JPO&Japio
JP25398189A 1989-09-29 1989-09-29 Track access control circuit for optical disk device Pending JPH03116544A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25398189A JPH03116544A (en) 1989-09-29 1989-09-29 Track access control circuit for optical disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25398189A JPH03116544A (en) 1989-09-29 1989-09-29 Track access control circuit for optical disk device

Publications (1)

Publication Number Publication Date
JPH03116544A true JPH03116544A (en) 1991-05-17

Family

ID=17258617

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25398189A Pending JPH03116544A (en) 1989-09-29 1989-09-29 Track access control circuit for optical disk device

Country Status (1)

Country Link
JP (1) JPH03116544A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05334696A (en) * 1992-05-29 1993-12-17 Victor Co Of Japan Ltd Access controller
US6163513A (en) * 1997-04-25 2000-12-19 Nec Corporation Track servo control apparatus for optical disk
JP2010027109A (en) * 2008-07-16 2010-02-04 Nec Electronics Corp Disk drive device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05334696A (en) * 1992-05-29 1993-12-17 Victor Co Of Japan Ltd Access controller
US6163513A (en) * 1997-04-25 2000-12-19 Nec Corporation Track servo control apparatus for optical disk
JP2010027109A (en) * 2008-07-16 2010-02-04 Nec Electronics Corp Disk drive device

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