JPS5727408A - Recording and reproducing device of magnetic tape - Google Patents

Recording and reproducing device of magnetic tape

Info

Publication number
JPS5727408A
JPS5727408A JP10130880A JP10130880A JPS5727408A JP S5727408 A JPS5727408 A JP S5727408A JP 10130880 A JP10130880 A JP 10130880A JP 10130880 A JP10130880 A JP 10130880A JP S5727408 A JPS5727408 A JP S5727408A
Authority
JP
Japan
Prior art keywords
speed
signal
phase
recording
tape
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
JP10130880A
Other languages
Japanese (ja)
Inventor
Shigeru Okada
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP10130880A priority Critical patent/JPS5727408A/en
Publication of JPS5727408A publication Critical patent/JPS5727408A/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
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/22—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing distortions
    • G11B20/225—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing distortions for reducing wow or flutter

Abstract

PURPOSE:To eliminate the effect of the uneven tape travelling speed which arises in a recording/reproduction system, by comparing the frequency corresponding to the travelling speed of a magnetic tape with the reference frequency. CONSTITUTION:The phase of the speed signal passed through a variable delay element 6 follows the phase fluctuation of the speed fluctuation during the recording, and the phase of the speed signal from the element 6 coincides with the reference signal during the reproduction respectively by a speed detecting head 7 and a speed detecting circuit 8. The clock signal supplied from a VCO12 contains no wow and flutter component of the tape travelling speed. The output of the detector 8 is supplied to a phase comparator 18 to be compared with the signal sent from a reference oscillator 16 in terms of the phase. Then the error signal is extracted. This signal controls the number of rotations of a capstan 21 via a DC amplifier 19 and a motor driving circuit 20. The travelling speed of a tape 1 is controlled based on the oscillation 16. Thus no difference of frequency is caused between the speed signal and the reference signal.
JP10130880A 1980-07-25 1980-07-25 Recording and reproducing device of magnetic tape Pending JPS5727408A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10130880A JPS5727408A (en) 1980-07-25 1980-07-25 Recording and reproducing device of magnetic tape

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10130880A JPS5727408A (en) 1980-07-25 1980-07-25 Recording and reproducing device of magnetic tape

Publications (1)

Publication Number Publication Date
JPS5727408A true JPS5727408A (en) 1982-02-13

Family

ID=14297174

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10130880A Pending JPS5727408A (en) 1980-07-25 1980-07-25 Recording and reproducing device of magnetic tape

Country Status (1)

Country Link
JP (1) JPS5727408A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100265887B1 (en) * 1997-12-31 2000-09-15 윤종용 Optical disc reproduction drive having a dc/dc converter
EP0691641B1 (en) * 1994-06-24 2000-11-02 Sony Corporation Audio signal processing apparatus and recording and/or reproducing apparatus for a tape-shaped recording medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0691641B1 (en) * 1994-06-24 2000-11-02 Sony Corporation Audio signal processing apparatus and recording and/or reproducing apparatus for a tape-shaped recording medium
KR100265887B1 (en) * 1997-12-31 2000-09-15 윤종용 Optical disc reproduction drive having a dc/dc converter

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