JPS6478517A - Digital system data slice circuit - Google Patents
Digital system data slice circuitInfo
- Publication number
- JPS6478517A JPS6478517A JP23652087A JP23652087A JPS6478517A JP S6478517 A JPS6478517 A JP S6478517A JP 23652087 A JP23652087 A JP 23652087A JP 23652087 A JP23652087 A JP 23652087A JP S6478517 A JPS6478517 A JP S6478517A
- Authority
- JP
- Japan
- Prior art keywords
- dropout
- extended
- signal
- level
- closed loop
- 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
- Signal Processing For Digital Recording And Reproducing (AREA)
- Manipulation Of Pulses (AREA)
Abstract
PURPOSE:To restore the level to a proper slice level after the end of dropout by increasing the clock frequency of an up-down counter by a dropout signal so as to increase the response of a closed loop system. CONSTITUTION:The closed loop system consists of a comparator 1, an up-down counter 2 and an A/D converter 3. A dropout signal is given to a dropout signal extending circuit 4 and outputted while being extended by a prescribed time. When the extended dropout signal is given to a clock frequency changeover circuit 5 and the extended dropout signal is at a high level, the high frequency clock is outputted as a sampling clock of the up-down counter 2. Thus, the response frequency of the closed loop system is increased for the extended dropout period only, the steep change in the DC component of the read signal is followed and the level is restored to a proper slice level after the end of dropout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23652087A JPS6478517A (en) | 1987-09-21 | 1987-09-21 | Digital system data slice circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23652087A JPS6478517A (en) | 1987-09-21 | 1987-09-21 | Digital system data slice circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6478517A true JPS6478517A (en) | 1989-03-24 |
Family
ID=17001916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23652087A Pending JPS6478517A (en) | 1987-09-21 | 1987-09-21 | Digital system data slice circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6478517A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5520008A (en) * | 1978-07-28 | 1980-02-13 | Nippon Telegr & Teleph Corp <Ntt> | Digital signal receiving device |
| JPS60216627A (en) * | 1984-04-12 | 1985-10-30 | Toshiba Corp | Digital data generating device |
-
1987
- 1987-09-21 JP JP23652087A patent/JPS6478517A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5520008A (en) * | 1978-07-28 | 1980-02-13 | Nippon Telegr & Teleph Corp <Ntt> | Digital signal receiving device |
| JPS60216627A (en) * | 1984-04-12 | 1985-10-30 | Toshiba Corp | Digital data generating device |
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