JPS5625253A - Tape run speed controller of magnetic recording and reproducing device - Google Patents

Tape run speed controller of magnetic recording and reproducing device

Info

Publication number
JPS5625253A
JPS5625253A JP3504479A JP3504479A JPS5625253A JP S5625253 A JPS5625253 A JP S5625253A JP 3504479 A JP3504479 A JP 3504479A JP 3504479 A JP3504479 A JP 3504479A JP S5625253 A JPS5625253 A JP S5625253A
Authority
JP
Japan
Prior art keywords
tape
speed
driving motor
run
run speed
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
JP3504479A
Other languages
Japanese (ja)
Inventor
Tomohiko Yamada
Masahiko Motai
Shigeo Tanaka
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP3504479A priority Critical patent/JPS5625253A/en
Publication of JPS5625253A publication Critical patent/JPS5625253A/en
Priority to US09/458,653 priority patent/US6333199B1/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
    • G11B15/52—Controlling, regulating, or indicating speed by using signals recorded on, or derived from, record carrier

Abstract

PURPOSE:To prevent a noise band from increasing by equipping a tape run control method that controls a reel driving motor so that the high-speed run speed of a beltlike magnetic tape will be constant. CONSTITUTION:Reel driving motor 12 drives take-up or supply reel 10 or 1. At this time, a control signal is detected by control head 4 and reproduced by reproducing circuit 41 before being led to speed detector 42. Since the frequency of the reproduced control signal varies with the speed of tape 2, the tape run speed is detected by measuring the time between signal pulses. The signal is supplied to the (-) terminal of operational amplifier 44 by way of the resistance and its (+) terminal is applied with a voltage from electric power source +B. The difference between the voltage set by variable resistance 46 and the input voltage of the inverted input terminal (-) is output and amplified 48 and the amplification output is applied to reel driving motor 12 to form the AFC servo loop so that the run speed of tape 2 will be constant. Consequently, the rotational frequency of motor 12 varies with the extent of a taken-up tape.
JP3504479A 1979-03-27 1979-03-27 Tape run speed controller of magnetic recording and reproducing device Pending JPS5625253A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP3504479A JPS5625253A (en) 1979-03-27 1979-03-27 Tape run speed controller of magnetic recording and reproducing device
US09/458,653 US6333199B1 (en) 1979-03-27 1999-12-10 Method of analyzing bisphenols and polyphenols

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3504479A JPS5625253A (en) 1979-03-27 1979-03-27 Tape run speed controller of magnetic recording and reproducing device

Publications (1)

Publication Number Publication Date
JPS5625253A true JPS5625253A (en) 1981-03-11

Family

ID=12431032

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3504479A Pending JPS5625253A (en) 1979-03-27 1979-03-27 Tape run speed controller of magnetic recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS5625253A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57181284A (en) * 1981-04-30 1982-11-08 Mitsubishi Electric Corp Magnetic video recording and reproducing device
JPS6056940U (en) * 1983-09-26 1985-04-20 日本ビクター株式会社 Reference signal switching device for servo circuit in recording and reproducing equipment
JPH02297748A (en) * 1989-05-10 1990-12-10 Mitsubishi Electric Corp Reel driving device for magnetic tape device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57181284A (en) * 1981-04-30 1982-11-08 Mitsubishi Electric Corp Magnetic video recording and reproducing device
JPS6056940U (en) * 1983-09-26 1985-04-20 日本ビクター株式会社 Reference signal switching device for servo circuit in recording and reproducing equipment
JPH02297748A (en) * 1989-05-10 1990-12-10 Mitsubishi Electric Corp Reel driving device for magnetic tape device

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