JPS5589939A - Magnetic recording rotary body and its manufacture - Google Patents
Magnetic recording rotary body and its manufactureInfo
- Publication number
- JPS5589939A JPS5589939A JP16269678A JP16269678A JPS5589939A JP S5589939 A JPS5589939 A JP S5589939A JP 16269678 A JP16269678 A JP 16269678A JP 16269678 A JP16269678 A JP 16269678A JP S5589939 A JPS5589939 A JP S5589939A
- Authority
- JP
- Japan
- Prior art keywords
- rotary body
- recording
- circuit
- constitution
- zero
- 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
Landscapes
- Rotational Drive Of Disk (AREA)
Abstract
PURPOSE:To increase the recording accuracy when the reference signal is recorded from the main rotary body to the rotary body by reducing the voltage applied to the recording head after the rotary body turns by one at the recording condition and stopping the rotary body when zero. CONSTITUTION:The frequency division circuit H is connected to the post stage of the amplifying circuit and the limiter circuit F, and the gain adjustment unit I, e.g., variable resistor, is located at the post stage of the frequency division circuit H. Further, the revolution of the main rotary body B one rotation or more is detected with the instruction from the control circuit J, the amplification degree of the amplifying circuit G for recording is gradually reduced at the gain adjustment unit I, and when the voltage applied to the recording head E is zero, the drive motor C is stopped. With this constitution, in recording the reference signal to the rotary body A such as turn table from the main rotary body B, the effect of magnetic field adjacent to the last and first is reduced, allowing to perform the detection signal recording with high accuracy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16269678A JPS5589939A (en) | 1978-12-27 | 1978-12-27 | Magnetic recording rotary body and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16269678A JPS5589939A (en) | 1978-12-27 | 1978-12-27 | Magnetic recording rotary body and its manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5589939A true JPS5589939A (en) | 1980-07-08 |
| JPS6346499B2 JPS6346499B2 (en) | 1988-09-16 |
Family
ID=15759551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16269678A Granted JPS5589939A (en) | 1978-12-27 | 1978-12-27 | Magnetic recording rotary body and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5589939A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0254446A (en) * | 1988-08-18 | 1990-02-23 | Nec Corp | Master disk manufacturing device for optical disk |
-
1978
- 1978-12-27 JP JP16269678A patent/JPS5589939A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0254446A (en) * | 1988-08-18 | 1990-02-23 | Nec Corp | Master disk manufacturing device for optical disk |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6346499B2 (en) | 1988-09-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RD03 | Notification of appointment of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7423 Effective date: 20040213 |
|
| A131 | Notification of reasons for refusal |
Effective date: 20051220 Free format text: JAPANESE INTERMEDIATE CODE: A131 |
|
| A521 | Written amendment |
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| A131 | Notification of reasons for refusal |
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| A521 | Written amendment |
Effective date: 20060718 Free format text: JAPANESE INTERMEDIATE CODE: A523 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20060905 |
|
| A61 | First payment of annual fees (during grant procedure) |
Effective date: 20060918 Free format text: JAPANESE INTERMEDIATE CODE: A61 |
|
| LAPS | Cancellation because of no payment of annual fees |