JPH03116544A - Track access control circuit for optical disk device - Google Patents
Track access control circuit for optical disk deviceInfo
- 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
Links
- 230000003287 optical Effects 0.000 title abstract 2
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
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)
| 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 |
-
1989
- 1989-09-29 JP JP25398189A patent/JPH03116544A/en active Pending
Cited By (3)
| 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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