JPS6447127A - Digital phase control circuit - Google Patents
Digital phase control circuitInfo
- Publication number
- JPS6447127A JPS6447127A JP62204716A JP20471687A JPS6447127A JP S6447127 A JPS6447127 A JP S6447127A JP 62204716 A JP62204716 A JP 62204716A JP 20471687 A JP20471687 A JP 20471687A JP S6447127 A JPS6447127 A JP S6447127A
- Authority
- JP
- Japan
- Prior art keywords
- clock
- signal
- phase correction
- circuit
- output
- 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
- Synchronisation In Digital Transmission Systems (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
PURPOSE:To improve the reliability by stopping the phase correction if a phase difference between an input data and an output clock exceeds a prescribed value thereby eliminating out of synchronism even to a data having a peak shift. CONSTITUTION:A reference processing circuit 11 inputs a reproducing data 101 and a reference clock 102 and generates a pulse signal 103 synchronously with the clock 102. Then a phase difference detection circuit 12 detects a deviation of the output clock 104 and the clock 102 from an ideal output of position when the signal 103 is given to the circuit 12. Then a phase correction stop circuit 13 outputs a phase correction stop signal 106 when the output of the circuit 12 exceeds a prescribed range. Thus, a phase correction circuit 14 applies phase correction of the clock 104 according to the output value 105 when no signal 106 exists and no phase correction is applied when the signal 106 is outputted. Thus, no out of synchronism is caused to a data having a peak shift like a reproducing signal from a floppy disk and the reliability is improved.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62204716A JPS6447127A (en) | 1987-08-17 | 1987-08-17 | Digital phase control circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62204716A JPS6447127A (en) | 1987-08-17 | 1987-08-17 | Digital phase control circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6447127A true JPS6447127A (en) | 1989-02-21 |
Family
ID=16495124
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62204716A Pending JPS6447127A (en) | 1987-08-17 | 1987-08-17 | Digital phase control circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6447127A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6775082B2 (en) | 2000-04-19 | 2004-08-10 | Nec Electronics Corporation | Digital VFO phase control device |
JP2005045365A (en) * | 2003-07-23 | 2005-02-17 | Yamaha Corp | Phase synchronization circuit |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS533765A (en) * | 1976-06-30 | 1978-01-13 | Matsushita Electric Ind Co Ltd | Phase synchronous oscillating unit |
JPS54154248A (en) * | 1978-05-26 | 1979-12-05 | Fujitsu Ltd | Pll circuit |
JPS5584007A (en) * | 1978-12-19 | 1980-06-24 | Matsushita Electric Ind Co Ltd | Recoder/reproducer of digital signal |
JPS60174530A (en) * | 1984-02-21 | 1985-09-07 | Fujitsu Ltd | Digital phase synchronizing circuit |
JPS613544A (en) * | 1984-06-15 | 1986-01-09 | Sony Corp | Synchronizing clock reproducing device |
-
1987
- 1987-08-17 JP JP62204716A patent/JPS6447127A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS533765A (en) * | 1976-06-30 | 1978-01-13 | Matsushita Electric Ind Co Ltd | Phase synchronous oscillating unit |
JPS54154248A (en) * | 1978-05-26 | 1979-12-05 | Fujitsu Ltd | Pll circuit |
JPS5584007A (en) * | 1978-12-19 | 1980-06-24 | Matsushita Electric Ind Co Ltd | Recoder/reproducer of digital signal |
JPS60174530A (en) * | 1984-02-21 | 1985-09-07 | Fujitsu Ltd | Digital phase synchronizing circuit |
JPS613544A (en) * | 1984-06-15 | 1986-01-09 | Sony Corp | Synchronizing clock reproducing device |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6775082B2 (en) | 2000-04-19 | 2004-08-10 | Nec Electronics Corporation | Digital VFO phase control device |
JP2005045365A (en) * | 2003-07-23 | 2005-02-17 | Yamaha Corp | Phase synchronization circuit |
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