JPS5525872A - Magnetic recording regenerator - Google Patents

Magnetic recording regenerator

Info

Publication number
JPS5525872A
JPS5525872A JP9902078A JP9902078A JPS5525872A JP S5525872 A JPS5525872 A JP S5525872A JP 9902078 A JP9902078 A JP 9902078A JP 9902078 A JP9902078 A JP 9902078A JP S5525872 A JPS5525872 A JP S5525872A
Authority
JP
Japan
Prior art keywords
circuit
output
waveform
inputted
capacitor
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.)
Granted
Application number
JP9902078A
Other languages
Japanese (ja)
Other versions
JPS5946043B2 (en
Inventor
Naoya Fujita
Toru Sanbe
Shigemitsu Higuchi
Masamichi Yamada
Koichi Tomatsuri
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 JP9902078A priority Critical patent/JPS5946043B2/en
Publication of JPS5525872A publication Critical patent/JPS5525872A/en
Publication of JPS5946043B2 publication Critical patent/JPS5946043B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/10—Indicating arrangements; Warning arrangements

Abstract

PURPOSE:To perform automatic measurement and automatic setting smoothly without malfunction by displaying fixed-period continuation of no regeneration output giving an alarm. CONSTITUTION:A regenerated reference signal is inputted to rectifier circuit 18 by way of amplifier circuit 16 and waveform shaping circuit 17 and then converted into a direct-current signal, but once the occurrence of a trouble in tape drive stops an regeneration output, the output waveform of circuit 18 changes. Since circuit 18 has a capacitor and discharging resistor, a rectified voltage damps suddenly when the regeneration output becomes zero according to the time constant determined by the capacitor and resistance. As a result, the voltage rectified into a rectangular waveform by waveform shaping circuit 19 triggers time generating circuit 21 via differentiating circuit 20. Signals, obtained by inverting the output and that of circuit 19 by inverter circuit 25 are inputted to AND circuit 22, where the both are AND-ed, and the output is stored in memory circuit 25 before display alarm circuit 24 is driven. Consequently, automatic measurement and automatic setting can be performed smoothly.
JP9902078A 1978-08-16 1978-08-16 magnetic recording and reproducing device Expired JPS5946043B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9902078A JPS5946043B2 (en) 1978-08-16 1978-08-16 magnetic recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9902078A JPS5946043B2 (en) 1978-08-16 1978-08-16 magnetic recording and reproducing device

Publications (2)

Publication Number Publication Date
JPS5525872A true JPS5525872A (en) 1980-02-23
JPS5946043B2 JPS5946043B2 (en) 1984-11-10

Family

ID=14235506

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9902078A Expired JPS5946043B2 (en) 1978-08-16 1978-08-16 magnetic recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS5946043B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5817508A (en) * 1981-07-23 1983-02-01 Victor Co Of Japan Ltd Detection system for signal level

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH021624A (en) * 1988-06-09 1990-01-05 Matsushita Electric Ind Co Ltd Outdoor communication equipment
JP2727749B2 (en) * 1990-09-21 1998-03-18 松下電器産業株式会社 Low-pass filter switching circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5817508A (en) * 1981-07-23 1983-02-01 Victor Co Of Japan Ltd Detection system for signal level
JPH0341883B2 (en) * 1981-07-23 1991-06-25

Also Published As

Publication number Publication date
JPS5946043B2 (en) 1984-11-10

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