JPS578938A - Tape end detecting circuit of magnetic recorder and reproducer - Google Patents

Tape end detecting circuit of magnetic recorder and reproducer

Info

Publication number
JPS578938A
JPS578938A JP8192580A JP8192580A JPS578938A JP S578938 A JPS578938 A JP S578938A JP 8192580 A JP8192580 A JP 8192580A JP 8192580 A JP8192580 A JP 8192580A JP S578938 A JPS578938 A JP S578938A
Authority
JP
Japan
Prior art keywords
tape end
hall
detection
reproducer
pulse
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
Application number
JP8192580A
Other languages
Japanese (ja)
Other versions
JPS633383B2 (en
Inventor
Koichi Sakai
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP8192580A priority Critical patent/JPS578938A/en
Publication of JPS578938A publication Critical patent/JPS578938A/en
Publication of JPS633383B2 publication Critical patent/JPS633383B2/ja
Granted 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
    • G11B15/093—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 driving condition of record carrier, e.g. travel, tape tension

Abstract

PURPOSE:To shorten the time required for tape end detection by obtaining a different pulse from a detection pulse for the rotation of a reel turntable and by achieving the tape end detection by using the obtained pulse. CONSTITUTION:The base circuit of a transistor (TR) Q4 turns on for a certain time when a Hall IC6 changes from an H to L, thereby charging a capacitor C5 through a resistance R9 and a diode D4. Since the capacitor C5 is charged when the output of the Hall IC6 changes from the L to H and H to L, the discharge time constant C5XR14 is reduced approximately to half as compared with the conventional one, and consequently the detection time for the ending terminal and starting terminal of a tape is nearly halved. The output of the Hall IC7 is inputted to a microcomputer M and stored in an RAM9 to set a zero flag ZF11 at need.
JP8192580A 1980-06-16 1980-06-16 Tape end detecting circuit of magnetic recorder and reproducer Granted JPS578938A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8192580A JPS578938A (en) 1980-06-16 1980-06-16 Tape end detecting circuit of magnetic recorder and reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8192580A JPS578938A (en) 1980-06-16 1980-06-16 Tape end detecting circuit of magnetic recorder and reproducer

Publications (2)

Publication Number Publication Date
JPS578938A true JPS578938A (en) 1982-01-18
JPS633383B2 JPS633383B2 (en) 1988-01-23

Family

ID=13760031

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8192580A Granted JPS578938A (en) 1980-06-16 1980-06-16 Tape end detecting circuit of magnetic recorder and reproducer

Country Status (1)

Country Link
JP (1) JPS578938A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5530057A (en) * 1978-08-24 1980-03-03 Kajima Corp Method of setting up prefabricated reinforced concrete

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5150013U (en) * 1974-10-14 1976-04-15
JPS5358208A (en) * 1976-11-08 1978-05-26 Yuni Kk System for stopping and detecting rotating operation for cassette tape recorder fully automatic mechanism

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5150013U (en) * 1974-10-14 1976-04-15
JPS5358208A (en) * 1976-11-08 1978-05-26 Yuni Kk System for stopping and detecting rotating operation for cassette tape recorder fully automatic mechanism

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5530057A (en) * 1978-08-24 1980-03-03 Kajima Corp Method of setting up prefabricated reinforced concrete
JPS5813692B2 (en) * 1978-08-24 1983-03-15 鹿島建設株式会社 Prefabricated reinforced concrete construction method

Also Published As

Publication number Publication date
JPS633383B2 (en) 1988-01-23

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