JPS5548821A - Phase synchronous circuit - Google Patents
Phase synchronous circuitInfo
- Publication number
- JPS5548821A JPS5548821A JP12229278A JP12229278A JPS5548821A JP S5548821 A JPS5548821 A JP S5548821A JP 12229278 A JP12229278 A JP 12229278A JP 12229278 A JP12229278 A JP 12229278A JP S5548821 A JPS5548821 A JP S5548821A
- Authority
- JP
- Japan
- Prior art keywords
- information
- immediately before
- phase difference
- correction pulse
- counter
- 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)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
PURPOSE: To make stable the period of synchronizing signal, by delivering correction pulse from the information "0" appeared immediately after the information "1" obtained from the magnetic recorder.
CONSTITUTION: The phase detector 1, LPF 2 and voltage controlled oscillator 3 constitute the phase locked loop. When the information of the input information IN is "0", the characteristics of the information "1" immediately before it shifted toward "0" is used. That is, the latch circuit 8 storing the phase difference between the synchronizing signal and the information is provided, this is compared with the content of the counter 9 storing the phase difference immediately before, if it is greater than the phase difference immediately before by a given value, it is detected that the information coming next is "0". This detected output produces the correction pulse from the counter 9. Thus, the synchronism can be stabilized since the correction pulse correctly produces at the period of information "0".
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12229278A JPS5548821A (en) | 1978-10-04 | 1978-10-04 | Phase synchronous circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12229278A JPS5548821A (en) | 1978-10-04 | 1978-10-04 | Phase synchronous circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5548821A true JPS5548821A (en) | 1980-04-08 |
Family
ID=14832336
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12229278A Pending JPS5548821A (en) | 1978-10-04 | 1978-10-04 | Phase synchronous circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5548821A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999052215A1 (en) * | 1998-03-31 | 1999-10-14 | Fujitsu General Limited | Phase-locked loop |
-
1978
- 1978-10-04 JP JP12229278A patent/JPS5548821A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999052215A1 (en) * | 1998-03-31 | 1999-10-14 | Fujitsu General Limited | Phase-locked loop |
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