JPS5514542A - Leading-in unit for recording and reproducing unit - Google Patents

Leading-in unit for recording and reproducing unit

Info

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
Application number
JP8715178A
Other languages
Japanese (ja)
Inventor
Shohei Yamazaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP8715178A priority Critical patent/JPS5514542A/en
Publication of JPS5514542A publication Critical patent/JPS5514542A/en
Pending legal-status Critical Current

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
JP8715178A 1978-07-19 1978-07-19 Leading-in unit for recording and reproducing unit Pending JPS5514542A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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