JPS648566A - Tracking servo device for optical disk device - Google Patents
Tracking servo device for optical disk deviceInfo
- Publication number
- JPS648566A JPS648566A JP16422987A JP16422987A JPS648566A JP S648566 A JPS648566 A JP S648566A JP 16422987 A JP16422987 A JP 16422987A JP 16422987 A JP16422987 A JP 16422987A JP S648566 A JPS648566 A JP S648566A
- Authority
- JP
- Japan
- Prior art keywords
- error signal
- mean value
- tracking error
- flaw
- eccentricity
- 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
Landscapes
- Moving Of The Head To Find And Align With The Track (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
PURPOSE:To allow the titled device to withstand a flaw or shock by using a mean value of eccentricity as a reference so as to apply tracking servo control thereby obtaining a consecutive tracking error signal. CONSTITUTION:A mean value calculation circuit 43 calculates a means value as to plural tracks at the location of an identical rotary angle from a reference axis with respect to the eccentricity gamma stored in a RAM 31. A pseudo tracking error signal e' obtained from a subtraction circuit 38 receiving the obtained mean value and a present relative position signal (y) is given to a driver 71 via a loop filter 39 and a digital/analog converter (D/A) 40. Thus, the titled device copes with track jump due to flaw or shock sufficiently and no discontinuous point takes place in the tracking error signal and stable servo control is attained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16422987A JPS648566A (en) | 1987-06-30 | 1987-06-30 | Tracking servo device for optical disk device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16422987A JPS648566A (en) | 1987-06-30 | 1987-06-30 | Tracking servo device for optical disk device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS648566A true JPS648566A (en) | 1989-01-12 |
Family
ID=15789125
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16422987A Pending JPS648566A (en) | 1987-06-30 | 1987-06-30 | Tracking servo device for optical disk device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS648566A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7367337B2 (en) | 2000-03-03 | 2008-05-06 | Resmed Limited | Adjustment of ventilator pressure-time profile to balance comfort and effectiveness |
-
1987
- 1987-06-30 JP JP16422987A patent/JPS648566A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7367337B2 (en) | 2000-03-03 | 2008-05-06 | Resmed Limited | Adjustment of ventilator pressure-time profile to balance comfort and effectiveness |
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