JPS645388A - Information reproducing apparatus - Google Patents
Information reproducing apparatusInfo
- Publication number
- JPS645388A JPS645388A JP62158214A JP15821487A JPS645388A JP S645388 A JPS645388 A JP S645388A JP 62158214 A JP62158214 A JP 62158214A JP 15821487 A JP15821487 A JP 15821487A JP S645388 A JPS645388 A JP S645388A
- Authority
- JP
- Japan
- Prior art keywords
- digital
- rotation
- signal
- value
- cumulative
- 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
- Control Of Electric Motors In General (AREA)
Abstract
PURPOSE:To enable the speed of a capstan motor to be controlled in a wide range with a forward or reverse rotational speed, by applying a feedback loop so that the digital value of a rotation detecting means may coincide with a digital command value. CONSTITUTION:From a rotation detector 23, the output of digital signal b and timing signal q according to the rotation of a motor section 21 based on signal from a rotation sensor 22 is generated. By the arithmetic unit 25 of a compensator 24, when the timing signal q is changed, then the digital signal b is subtracted from a digital command value for a reference, and a digital rotation error is obtained, and the digital rotation error is added to a cumulative digital value before one rotation. Then, a digital value Y according to the cumulative digital value is applied to a driving unit 28 via a D/A converter 27.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62158214A JPS645388A (en) | 1987-06-25 | 1987-06-25 | Information reproducing apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62158214A JPS645388A (en) | 1987-06-25 | 1987-06-25 | Information reproducing apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS645388A true JPS645388A (en) | 1989-01-10 |
Family
ID=15666774
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62158214A Pending JPS645388A (en) | 1987-06-25 | 1987-06-25 | Information reproducing apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS645388A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02312045A (en) * | 1989-05-26 | 1990-12-27 | Matsushita Electric Ind Co Ltd | Information reproducing device. |
JPH0340778A (en) * | 1989-07-07 | 1991-02-21 | Matsushita Electric Ind Co Ltd | Speed controller |
-
1987
- 1987-06-25 JP JP62158214A patent/JPS645388A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02312045A (en) * | 1989-05-26 | 1990-12-27 | Matsushita Electric Ind Co Ltd | Information reproducing device. |
JPH0340778A (en) * | 1989-07-07 | 1991-02-21 | Matsushita Electric Ind Co Ltd | Speed controller |
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