JPS54130101A - Reproduction end detecting method - Google Patents

Reproduction end detecting method

Info

Publication number
JPS54130101A
JPS54130101A JP3769078A JP3769078A JPS54130101A JP S54130101 A JPS54130101 A JP S54130101A JP 3769078 A JP3769078 A JP 3769078A JP 3769078 A JP3769078 A JP 3769078A JP S54130101 A JPS54130101 A JP S54130101A
Authority
JP
Japan
Prior art keywords
reproduction end
signal
groove
pickup
goes
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
JP3769078A
Other languages
Japanese (ja)
Inventor
Yoshio Maniwa
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP3769078A priority Critical patent/JPS54130101A/en
Publication of JPS54130101A publication Critical patent/JPS54130101A/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
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/02—Arrangements of heads
    • G11B3/08—Raising, lowering, traversing otherwise than for transducing, arresting, or holding-up heads against record carriers
    • G11B3/095—Raising, lowering, traversing otherwise than for transducing, arresting, or holding-up heads against record carriers for repeating a part of the record; for beginning or stopping at a desired point of the record
    • G11B3/0952—Raising, lowering, traversing otherwise than for transducing, arresting, or holding-up heads against record carriers for repeating a part of the record; for beginning or stopping at a desired point of the record using automatic means

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To perform the detection of reproduction end surely by beforehand recording the signal of the specified frequency for detecting the reproduction end between the final groove and lead-out groove of a record disc. CONSTITUTION:When a pickup 2 detects the constant frequency signal having been recorded between the final groove 9 and lead-out groove 8 of a record disc 1, a monostable multi 15 and retriggerable monostable multi 14 are triggered by way of a saturation amplifier 11, integrator 12 and Schmitt trigger circuit 13. Then, the outputs of the multi 14 and of the multi 15 through inverter 16 are applied to an AND gate 17 and the reproduction end signal which conducts a transistor 18 when the multi 14 goes ON and the multi 15 goes OFF is generated from the gate 17. Hence, the reproduction end is surely detected according to the setting of the time constants of the multis 14, 15 without using any switch or the like and the separation of the pickup from the record and the like are well accomplished.
JP3769078A 1978-03-31 1978-03-31 Reproduction end detecting method Pending JPS54130101A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3769078A JPS54130101A (en) 1978-03-31 1978-03-31 Reproduction end detecting method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3769078A JPS54130101A (en) 1978-03-31 1978-03-31 Reproduction end detecting method

Publications (1)

Publication Number Publication Date
JPS54130101A true JPS54130101A (en) 1979-10-09

Family

ID=12504553

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3769078A Pending JPS54130101A (en) 1978-03-31 1978-03-31 Reproduction end detecting method

Country Status (1)

Country Link
JP (1) JPS54130101A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4769802A (en) * 1984-06-07 1988-09-06 Victor Company Of Japan, Ltd. Information recording medium disc and method and apparatus for recording/reproducing information using the disc
GB2573580A (en) * 2018-05-08 2019-11-13 Hanpin Electron Co Ltd Detection system of vinyl record player for detecting end of playback

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4769802A (en) * 1984-06-07 1988-09-06 Victor Company Of Japan, Ltd. Information recording medium disc and method and apparatus for recording/reproducing information using the disc
GB2573580A (en) * 2018-05-08 2019-11-13 Hanpin Electron Co Ltd Detection system of vinyl record player for detecting end of playback

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