JPS5755563A - Disk reproducer - Google Patents
Disk reproducerInfo
- Publication number
- JPS5755563A JPS5755563A JP13092380A JP13092380A JPS5755563A JP S5755563 A JPS5755563 A JP S5755563A JP 13092380 A JP13092380 A JP 13092380A JP 13092380 A JP13092380 A JP 13092380A JP S5755563 A JPS5755563 A JP S5755563A
- Authority
- JP
- Japan
- Prior art keywords
- disk
- revolutions
- pickup
- motor
- synchronous signal
- 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
- Rotational Drive Of Disk (AREA)
Abstract
PURPOSE: To discriminate the type of a disk, by extracting a synchronous signal before a pickup reaches the most inner circumference of a disk to control a motor to a prescribed number of revolutions, then using the difference of the numbers of revolutions.
CONSTITUTION: While a pickup 4 moves to the inner circumference from the most outer circumference of a disk, the track is traced by a tracking servo motor. Thus a synchronous signal is detected, and the servo system of the number of revolutions of a motor 2 is actuated. As the speed of the linear shift of a pickup 4 is sufficiently low compared with the speed of revolution a disk 1, the servo lead-in is made possible from the detection of the synchronous signal in a short time by the power of the tracking servo motor. In this case, the DC level of the output of an F/V converter 11 has a large amount of difference to enable the device to discriminate the type of the disk.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13092380A JPS5755563A (en) | 1980-09-19 | 1980-09-19 | Disk reproducer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13092380A JPS5755563A (en) | 1980-09-19 | 1980-09-19 | Disk reproducer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5755563A true JPS5755563A (en) | 1982-04-02 |
Family
ID=15045888
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13092380A Pending JPS5755563A (en) | 1980-09-19 | 1980-09-19 | Disk reproducer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5755563A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4866695A (en) * | 1986-09-24 | 1989-09-12 | Hitachi, Ltd. | Access control system for rotating an information storage disc at a constant linear velocity |
-
1980
- 1980-09-19 JP JP13092380A patent/JPS5755563A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4866695A (en) * | 1986-09-24 | 1989-09-12 | Hitachi, Ltd. | Access control system for rotating an information storage disc at a constant linear velocity |
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