JPS6479973A - Digital signal reproducing device - Google Patents
Digital signal reproducing deviceInfo
- Publication number
- JPS6479973A JPS6479973A JP23675787A JP23675787A JPS6479973A JP S6479973 A JPS6479973 A JP S6479973A JP 23675787 A JP23675787 A JP 23675787A JP 23675787 A JP23675787 A JP 23675787A JP S6479973 A JPS6479973 A JP S6479973A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- reproducing
- comparator
- circuit
- differentiating
- 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)
Abstract
PURPOSE:To eliminate amplitude fluctuation and influence of a low frequency component and then to carry out a reproducing by comparing a 2nd order differentiating signal of a reproducing signal with a prescribed value, generating then a binary window signal and gating a peak detecting signal of the reproduc ing signal with this window signal. CONSTITUTION:The reproducing signal 2 read by an optical head from a magneto-optical disk is inputted to a data detecting circuit 3. The signal 2 is sent to a differentiating circuit 4 to be outputted. A 1st order differentiating signal 3' is sent to a comparator 5 and a differentiating circuit 6. The signal 3' is compared with a zero level by the comparator 5 to supply a differentiating binary signal to a trailing edge detecting circuit 7. The 2nd order differentiating signal 4' is sent by the circuit 6 to a comparator 9, where it is compared with a voltage V0 which is slightly negative from 0V by the comparator 9. An output of the comparator 9 is inverted by an inverter 10 to form the window signal 6'. The peak detecting signal 7' is gated by an AND circuit 8 based on the signal 6' to output a reproducing data signal 8'. By this method, the amplitude fluctuation and the influence of the low frequency component comprised in the reproducing signal is eliminated and reproducing can be carried out.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23675787A JPS6479973A (en) | 1987-09-21 | 1987-09-21 | Digital signal reproducing device |
CA000577830A CA1322594C (en) | 1987-09-21 | 1988-09-19 | Digital signal reproduction apparatus |
US07/245,771 US4954903A (en) | 1987-09-21 | 1988-09-19 | Digital signal reproduction apparatus for reading magneto-optical disks |
DE8888308755T DE3873678T2 (en) | 1987-09-21 | 1988-09-21 | DATA SIGNAL PLAYER. |
EP88308755A EP0312214B1 (en) | 1987-09-21 | 1988-09-21 | Digital signal reproduction apparatus |
US07/498,710 US5166838A (en) | 1987-09-21 | 1990-03-26 | Digital signal reproduction apparatus for reading magneto-optical discs |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23675787A JPS6479973A (en) | 1987-09-21 | 1987-09-21 | Digital signal reproducing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6479973A true JPS6479973A (en) | 1989-03-24 |
Family
ID=17005340
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23675787A Pending JPS6479973A (en) | 1987-09-21 | 1987-09-21 | Digital signal reproducing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6479973A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0466670A2 (en) * | 1990-07-13 | 1992-01-15 | International Business Machines Corporation | System and method for optical phase change recording |
US5311493A (en) * | 1990-04-06 | 1994-05-10 | Sharp Kabushiki Kaisha | Data reproduction circuit for converting a read analog signal |
-
1987
- 1987-09-21 JP JP23675787A patent/JPS6479973A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5311493A (en) * | 1990-04-06 | 1994-05-10 | Sharp Kabushiki Kaisha | Data reproduction circuit for converting a read analog signal |
EP0466670A2 (en) * | 1990-07-13 | 1992-01-15 | International Business Machines Corporation | System and method for optical phase change recording |
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