JPS5671842A - Magnetic recording and playback device - Google Patents

Magnetic recording and playback device

Info

Publication number
JPS5671842A
JPS5671842A JP14918879A JP14918879A JPS5671842A JP S5671842 A JPS5671842 A JP S5671842A JP 14918879 A JP14918879 A JP 14918879A JP 14918879 A JP14918879 A JP 14918879A JP S5671842 A JPS5671842 A JP S5671842A
Authority
JP
Japan
Prior art keywords
circuit
rotating
drum
control loop
fed
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
JP14918879A
Other languages
Japanese (ja)
Inventor
Takayuki Sasaki
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP14918879A priority Critical patent/JPS5671842A/en
Publication of JPS5671842A publication Critical patent/JPS5671842A/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
    • G11B15/46—Controlling, regulating, or indicating speed
    • G11B15/467—Controlling, regulating, or indicating speed in arrangements for recording or reproducing wherein both record carriers and heads are driven
    • G11B15/473—Controlling, regulating, or indicating speed in arrangements for recording or reproducing wherein both record carriers and heads are driven by controlling the speed of the heads

Landscapes

  • Control Of Velocity Or Acceleration (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

PURPOSE:To simplify speed control of rotating drum, by constituting the rotating speed control loop through the use of a pulse generator provided to form the rotating phase control loop of a playback device. CONSTITUTION:A magnetic tape 3 is wound on a rotating drum 1 having a pair of rotating magnetic heads 2a, 2b, and while turning the drum 1, a pulse generator 6 consisting of the head 6a and the magnet 6b built in the drum 1 is contacted. Next, the pulse generated at the generator 6 is fed to a smaple hold circuit 13 via an amplifier 7 and a wave shape circuit 8, and the vertical synchronizing signal from the input terminal 10 is fed to the circuit 13. After that, the output of the circuit 13 is fed to a drive circuit through an addition circuit 17 to control a drum driving motor 4. Next, added with a rotating phase control loop 5 thus constituted, a rotating speed control loop 20 consisting of a peack hold circuit 21 and a smaple hold circuit 22 is provided, and the said addition circuit 17 is controlled through the output of the circuits 7 and 8 via an addition circuit 24.
JP14918879A 1979-11-16 1979-11-16 Magnetic recording and playback device Pending JPS5671842A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14918879A JPS5671842A (en) 1979-11-16 1979-11-16 Magnetic recording and playback device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14918879A JPS5671842A (en) 1979-11-16 1979-11-16 Magnetic recording and playback device

Publications (1)

Publication Number Publication Date
JPS5671842A true JPS5671842A (en) 1981-06-15

Family

ID=15469717

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14918879A Pending JPS5671842A (en) 1979-11-16 1979-11-16 Magnetic recording and playback device

Country Status (1)

Country Link
JP (1) JPS5671842A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5938804A (en) * 1982-08-30 1984-03-02 Hitachi Ltd Method and device for correcting steady-state phase error
JPS63168868A (en) * 1987-01-06 1988-07-12 Canon Inc Rotary head type recording/reproducing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5938804A (en) * 1982-08-30 1984-03-02 Hitachi Ltd Method and device for correcting steady-state phase error
JPS63168868A (en) * 1987-01-06 1988-07-12 Canon Inc Rotary head type recording/reproducing device

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