JPS5514542A - Leading-in unit for recording and reproducing unit - Google Patents
Leading-in unit for recording and reproducing unitInfo
- Publication number
- JPS5514542A JPS5514542A JP8715178A JP8715178A JPS5514542A JP S5514542 A JPS5514542 A JP S5514542A JP 8715178 A JP8715178 A JP 8715178A JP 8715178 A JP8715178 A JP 8715178A JP S5514542 A JPS5514542 A JP S5514542A
- Authority
- JP
- Japan
- Prior art keywords
- leading
- duty ratio
- program
- control signal
- signal
- 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
Abstract
PURPOSE: To simplify the constitution and to perform excellent leading-in, by forming the leading-in signal through the conversion of the control signal of VTR into pulses different in duty ratio depending on the leading-in data.
CONSTITUTION: The variable delay monostable multivibrator 3 is triggered with the control signal of VTR differentiated with the differentiating circuit 2. Thus, the multivibrator 3 produces the program pulse in synchronizing with the control signal for the leading in different duty ratio depending on the program signal in binary value inputted and it is recorded on the tape 6. Accordingly, when this recording is reproduced, the leading and trailing of the program pulse different in duty ratio is produced from the control amplifier 8. The control signal is formed into the original binary program code from the wave shape circuit 9 with the leading pulse by means of T type FF11,12, phase detector 13, and A/D conversion. Without providing queue track, the leading-in of the program and the phase control of the rotary head are simultaneously made, to simplify the unit consitution, and excellent leading-in can be made with the use of duty ratio without being affected with power supply variation.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8715178A JPS5514542A (en) | 1978-07-19 | 1978-07-19 | Leading-in unit for recording and reproducing unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8715178A JPS5514542A (en) | 1978-07-19 | 1978-07-19 | Leading-in unit for recording and reproducing unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5514542A true JPS5514542A (en) | 1980-02-01 |
Family
ID=13906970
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8715178A Pending JPS5514542A (en) | 1978-07-19 | 1978-07-19 | Leading-in unit for recording and reproducing unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5514542A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6141171A (en) * | 1997-04-28 | 2000-10-31 | Nec Corporation | Cue signal detection circuit of magnetic recording and reproducing device |
-
1978
- 1978-07-19 JP JP8715178A patent/JPS5514542A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6141171A (en) * | 1997-04-28 | 2000-10-31 | Nec Corporation | Cue signal detection circuit of magnetic recording and reproducing device |
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