JPS6446385A - Tracking controller in information reader - Google Patents
Tracking controller in information readerInfo
- Publication number
- JPS6446385A JPS6446385A JP63192453A JP19245388A JPS6446385A JP S6446385 A JPS6446385 A JP S6446385A JP 63192453 A JP63192453 A JP 63192453A JP 19245388 A JP19245388 A JP 19245388A JP S6446385 A JPS6446385 A JP S6446385A
- Authority
- JP
- Japan
- Prior art keywords
- servo loop
- signal
- pickup
- opening
- circuit
- 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
Links
Abstract
PURPOSE:To execute a stable jumping operation and an exact tracking by holding an error signal just preceding to the opening of a switching means and impressing it to a driving means. CONSTITUTION:A low frequency area equalizer 9, which is a signal holding means, is provided in the rear step of a switching circuit 8 to execute the opening/closing of a servo loop. At a time point to open the servo loop, the error signal just preceding to the opening of the servo loop is supplied from the signal holding means 9 to a pickup driving means together with an accelerating signal. Then the pickup means is accelerated and the signal holding means 9 is operated even as a circuit for characteristic compensation of a phase compensating circuit, etc., in the servo loop. Thus, the track jumping operation of the pickup means can be stably and securely executed with the simple constitution and the converging of the information reading point of the pickup means can be speedily executed to the track after the jumping.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63192453A JPS6446385A (en) | 1988-08-01 | 1988-08-01 | Tracking controller in information reader |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63192453A JPS6446385A (en) | 1988-08-01 | 1988-08-01 | Tracking controller in information reader |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6446385A true JPS6446385A (en) | 1989-02-20 |
JPH031875B2 JPH031875B2 (en) | 1991-01-11 |
Family
ID=16291553
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63192453A Granted JPS6446385A (en) | 1988-08-01 | 1988-08-01 | Tracking controller in information reader |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6446385A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5226802A (en) * | 1975-08-21 | 1977-02-28 | Philips Nv | Device for reading diskklike recording carrier |
-
1988
- 1988-08-01 JP JP63192453A patent/JPS6446385A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5226802A (en) * | 1975-08-21 | 1977-02-28 | Philips Nv | Device for reading diskklike recording carrier |
Also Published As
Publication number | Publication date |
---|---|
JPH031875B2 (en) | 1991-01-11 |
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