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JPS5555456A - Magnetic tape device - Google Patents

Magnetic tape device

Info

Publication number
JPS5555456A
JPS5555456A JP12879478A JP12879478A JPS5555456A JP S5555456 A JPS5555456 A JP S5555456A JP 12879478 A JP12879478 A JP 12879478A JP 12879478 A JP12879478 A JP 12879478A JP S5555456 A JPS5555456 A JP S5555456A
Authority
JP
Japan
Prior art keywords
end detector
output
reset
light source
life
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
JP12879478A
Other languages
Japanese (ja)
Inventor
Kunio Noguchi
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP12879478A priority Critical patent/JPS5555456A/en
Publication of JPS5555456A publication Critical patent/JPS5555456A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/05—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container
    • G11B15/06—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container by sensing auxiliary features on record carriers or containers, e.g. to stop machine near the end of a tape
    • G11B15/08—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container by sensing auxiliary features on record carriers or containers, e.g. to stop machine near the end of a tape by photoelectric sensing

Abstract

PURPOSE:To extend the life of a near-end detector and improve reliability by supplying power only at a high-speed rewinding time and an unload time. CONSTITUTION:A near-end detector constituted by light source 3 and photo sensor 4 is provided in the winding reel 2 side, and light source 3 is so arranged that the optical axis may be near to the axis of winding reel 2 and may agree with the optical axis of photo sensor 4. The output of an FF circuit, which is set by a high- speed rewinding instruction and is reset by BOT detection, and the output of the FF circuit, which is set by a load instruction and is reset by BOT detection, are inputted to terminals B and C of NAND gate 11 respectively. The output of gate 11 is connected to the base of transistor Q3. The life of the near-end detector can be extended and the reliability of the device can be enhanced by constituting the device so that power may be supplied to the near-end detector only when the rewind FF is high in this manner.
JP12879478A 1978-10-19 1978-10-19 Magnetic tape device Pending JPS5555456A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12879478A JPS5555456A (en) 1978-10-19 1978-10-19 Magnetic tape device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12879478A JPS5555456A (en) 1978-10-19 1978-10-19 Magnetic tape device

Publications (1)

Publication Number Publication Date
JPS5555456A true JPS5555456A (en) 1980-04-23

Family

ID=14993600

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12879478A Pending JPS5555456A (en) 1978-10-19 1978-10-19 Magnetic tape device

Country Status (1)

Country Link
JP (1) JPS5555456A (en)

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