JPS6476567A - Jitter measuring system for disk storage device - Google Patents
Jitter measuring system for disk storage deviceInfo
- Publication number
- JPS6476567A JPS6476567A JP23258887A JP23258887A JPS6476567A JP S6476567 A JPS6476567 A JP S6476567A JP 23258887 A JP23258887 A JP 23258887A JP 23258887 A JP23258887 A JP 23258887A JP S6476567 A JPS6476567 A JP S6476567A
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- latch
- jitter
- shift register
- value
- 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 measure jitter while reading data by finding the value of the jitter as the position of a latch register by which a read pulse is latched by transferring the read pulse stored in each stage of a shift register to a corresponding latch register. CONSTITUTION:An output pulse P is inputted to the first stage of shift register 2, and is shifted sequentially by a clock C generated from the output pulse P by a phase synchronizing oscillator 1. A latch pulse generation circuit 3 outputs a latch pulse R at every window period generated based on the clock pulse C from the phase synchronizing oscillator 1, and latches the value stored in each of the stages 21-25 of the shift register 2 in the latch registers 41-45 provided correspondingly. Then, the value of the jitter is found as the position of the latch registers 41-45 where the read pulse P is latched. In such a way, it is possible to measure the jitter of output easily and surely as reading out the data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23258887A JPS6476567A (en) | 1987-09-18 | 1987-09-18 | Jitter measuring system for disk storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23258887A JPS6476567A (en) | 1987-09-18 | 1987-09-18 | Jitter measuring system for disk storage device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6476567A true JPS6476567A (en) | 1989-03-22 |
Family
ID=16941714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23258887A Pending JPS6476567A (en) | 1987-09-18 | 1987-09-18 | Jitter measuring system for disk storage device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6476567A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100696049B1 (en) * | 1998-10-20 | 2007-03-15 | 프론티어 인코포레이티드 | Biaxial stretch blow molding machine |
-
1987
- 1987-09-18 JP JP23258887A patent/JPS6476567A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100696049B1 (en) * | 1998-10-20 | 2007-03-15 | 프론티어 인코포레이티드 | Biaxial stretch blow molding machine |
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