JPS5746355A - Speed controller of turntable - Google Patents
Speed controller of turntableInfo
- Publication number
- JPS5746355A JPS5746355A JP12315880A JP12315880A JPS5746355A JP S5746355 A JPS5746355 A JP S5746355A JP 12315880 A JP12315880 A JP 12315880A JP 12315880 A JP12315880 A JP 12315880A JP S5746355 A JPS5746355 A JP S5746355A
- Authority
- JP
- Japan
- Prior art keywords
- rotation
- speed
- turntable
- converted
- supplied
- 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 realize the rotation of a certain linear speed, by digitally calculating the position of a pickup in the form of an extent of shift from the original point.
CONSTITUTION: A base board 4 of a turntable 2 on which a disk 1 is mounted has a parallel shift in the right and left directions on rails 5 by the rotation of a drive screw 6. As a result, a fixed pickup 10 follows a spiral track. A pulse disk 16 is attached to the shaft of a mobile motor 7, and a pulse signal of a frequency proportional to the speed of rotation is produced by a photointerrupter 17 to be clock- supplied at 19 to an up-down counter 18 of a logical circuit 27. Then the numerical value showing the diameter of a track under reproduction is converted into the numerical value showing the speed of rotation of the table 2 by a coefficient ROM22. This value is then converted at 23 into an analog voltage and supplied to a motor 3 via a differential amplifier 24 to perform the rotation of a certain linear speed.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12315880A JPS5746355A (en) | 1980-09-04 | 1980-09-04 | Speed controller of turntable |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12315880A JPS5746355A (en) | 1980-09-04 | 1980-09-04 | Speed controller of turntable |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5746355A true JPS5746355A (en) | 1982-03-16 |
Family
ID=14853610
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12315880A Pending JPS5746355A (en) | 1980-09-04 | 1980-09-04 | Speed controller of turntable |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5746355A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4613916A (en) * | 1983-12-30 | 1986-09-23 | International Business Machines Corporation | Information storage disk transducer position control system requiring no servo pattern on the storage disk |
US4855978A (en) * | 1984-11-28 | 1989-08-08 | Pioneer Electronic Corporation | Video/compact disk player having reduced track search time |
-
1980
- 1980-09-04 JP JP12315880A patent/JPS5746355A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4613916A (en) * | 1983-12-30 | 1986-09-23 | International Business Machines Corporation | Information storage disk transducer position control system requiring no servo pattern on the storage disk |
US4855978A (en) * | 1984-11-28 | 1989-08-08 | Pioneer Electronic Corporation | Video/compact disk player having reduced track search time |
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