JPS57100649A - Controller for running speed of magnetic tape - Google Patents

Controller for running speed of magnetic tape

Info

Publication number
JPS57100649A
JPS57100649A JP55176392A JP17639280A JPS57100649A JP S57100649 A JPS57100649 A JP S57100649A JP 55176392 A JP55176392 A JP 55176392A JP 17639280 A JP17639280 A JP 17639280A JP S57100649 A JPS57100649 A JP S57100649A
Authority
JP
Japan
Prior art keywords
amplifier
magnetic tape
clock
running speed
reference clock
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
JP55176392A
Other languages
Japanese (ja)
Inventor
Katsuhiko Otomo
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP55176392A priority Critical patent/JPS57100649A/en
Publication of JPS57100649A publication Critical patent/JPS57100649A/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
    • G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/44—Speed-changing arrangements; Reversing arrangements; Drive transfer means therefor
    • G11B15/442—Control thereof

Landscapes

  • Control Of Velocity Or Acceleration (AREA)

Abstract

PURPOSE:To obtain an optional tape speed without time delay, by shifting the offset level of a DC amplifier, which amplifies a phase error voltage between a reference clock and a reproduced clock, by using a D/A converter. CONSTITUTION:The phase of a reference clock from an input terminal 1 and that of a reproduced clock from a clock detection part 6 are compared with each other by a phase comparator 2, and the resulting phase error voltage is amplified by a DC amplifier 8. A DC motor 10 is driven by its output to control a run of a magnetic tape. Then, the offset level of the DC amplifier 8 is shifted by a D/A converter 13. For this purpose, when the frequency of the reference clock is varied in order to vary the running speed of the magnetic tape, the DC amplifier 8 generates a corresponding output voltage instantaneously, setting an optional tape speed without time delay.
JP55176392A 1980-12-12 1980-12-12 Controller for running speed of magnetic tape Pending JPS57100649A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55176392A JPS57100649A (en) 1980-12-12 1980-12-12 Controller for running speed of magnetic tape

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55176392A JPS57100649A (en) 1980-12-12 1980-12-12 Controller for running speed of magnetic tape

Publications (1)

Publication Number Publication Date
JPS57100649A true JPS57100649A (en) 1982-06-22

Family

ID=16012847

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55176392A Pending JPS57100649A (en) 1980-12-12 1980-12-12 Controller for running speed of magnetic tape

Country Status (1)

Country Link
JP (1) JPS57100649A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8505404B2 (en) 2007-04-17 2013-08-13 Ntn Corporation Switching device for switching driving force between forward and reverse directions
US9086103B2 (en) 2009-03-16 2015-07-21 Ntn Corporation Rotation transmission device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8505404B2 (en) 2007-04-17 2013-08-13 Ntn Corporation Switching device for switching driving force between forward and reverse directions
US9086103B2 (en) 2009-03-16 2015-07-21 Ntn Corporation Rotation transmission device

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