JPS55948A - Servo unit of optical information reader - Google Patents
Servo unit of optical information readerInfo
- Publication number
- JPS55948A JPS55948A JP7397778A JP7397778A JPS55948A JP S55948 A JPS55948 A JP S55948A JP 7397778 A JP7397778 A JP 7397778A JP 7397778 A JP7397778 A JP 7397778A JP S55948 A JPS55948 A JP S55948A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- frame
- synchronizing signal
- horizontal
- phases
- 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.)
- Granted
Links
Landscapes
- Rotational Drive Of Disk (AREA)
Abstract
PURPOSE: To enable more than two video discs to operate simultaneously by generating various control signals by making a comparison of phases of a frame signal, horizontal synchronizing signal and color burst signal from a reference signal and regenerated signal.
CONSTITUTION: Frame signal F and horizontal synchronizing signal H obtained from a synchronizing signal from reference composite synchronizing signal generator 21 through synchronous separation 22 are phase-compared 23 and 24 with signals F and H generated from a signal from regenerator 26 through synchronous separation 27, and frame lock detector 28 and horizontal lock detector 29 detect whether or not phases agree mutually. When phases of both frame signals agree each other, the phase comparison loop of the horizontal synchronizing signal is formed by a control signal from detector 28 and synchronization is performed definitely and rapidly. A reference color sub-carrier and regenerated color burst signal are compared each other by tangential servo part 50 to make a time-base correction. While frames and horizontal locking are not made, gate 35 is cut off and the time-base correction is made accurately.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7397778A JPS55948A (en) | 1978-06-19 | 1978-06-19 | Servo unit of optical information reader |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7397778A JPS55948A (en) | 1978-06-19 | 1978-06-19 | Servo unit of optical information reader |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13149885A Division JPS6192441A (en) | 1985-06-17 | 1985-06-17 | Servo device of recording information reader |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55948A true JPS55948A (en) | 1980-01-07 |
JPS6232545B2 JPS6232545B2 (en) | 1987-07-15 |
Family
ID=13533657
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7397778A Granted JPS55948A (en) | 1978-06-19 | 1978-06-19 | Servo unit of optical information reader |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55948A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59146481A (en) * | 1983-02-09 | 1984-08-22 | Pioneer Electronic Corp | Time axis control system |
JPS6119251A (en) * | 1984-07-05 | 1986-01-28 | Matsushita Electric Ind Co Ltd | Clock regenerating device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4990114A (en) * | 1972-12-26 | 1974-08-28 | ||
JPS5031808A (en) * | 1973-07-19 | 1975-03-28 | ||
JPS5211574A (en) * | 1975-07-15 | 1977-01-28 | Meinan Mach Works Inc | Device for separating pilend up plates one by one |
JPS5269219A (en) * | 1975-12-05 | 1977-06-08 | Matsushita Electric Ind Co Ltd | Magnetic record reproducing device |
-
1978
- 1978-06-19 JP JP7397778A patent/JPS55948A/en active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4990114A (en) * | 1972-12-26 | 1974-08-28 | ||
JPS5031808A (en) * | 1973-07-19 | 1975-03-28 | ||
JPS5211574A (en) * | 1975-07-15 | 1977-01-28 | Meinan Mach Works Inc | Device for separating pilend up plates one by one |
JPS5269219A (en) * | 1975-12-05 | 1977-06-08 | Matsushita Electric Ind Co Ltd | Magnetic record reproducing device |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59146481A (en) * | 1983-02-09 | 1984-08-22 | Pioneer Electronic Corp | Time axis control system |
JPH0514353B2 (en) * | 1983-02-09 | 1993-02-24 | Pioneer Electronic Corp | |
JPS6119251A (en) * | 1984-07-05 | 1986-01-28 | Matsushita Electric Ind Co Ltd | Clock regenerating device |
Also Published As
Publication number | Publication date |
---|---|
JPS6232545B2 (en) | 1987-07-15 |
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