JPS55150122A - Magnetic recording and reproducing device - Google Patents

Magnetic recording and reproducing device

Info

Publication number
JPS55150122A
JPS55150122A JP5709879A JP5709879A JPS55150122A JP S55150122 A JPS55150122 A JP S55150122A JP 5709879 A JP5709879 A JP 5709879A JP 5709879 A JP5709879 A JP 5709879A JP S55150122 A JPS55150122 A JP S55150122A
Authority
JP
Japan
Prior art keywords
signal
level
reference signal
detector
change
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
JP5709879A
Other languages
Japanese (ja)
Inventor
Kenji Kano
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 JP5709879A priority Critical patent/JPS55150122A/en
Publication of JPS55150122A publication Critical patent/JPS55150122A/en
Pending legal-status Critical Current

Links

Landscapes

  • Television Signal Processing For Recording (AREA)

Abstract

PURPOSE:To make it possible to change reproduction equalizing characteristics automatically and selectively by detecting the level of a reproduced reference signal, by generating a switching signal correspondingly and then cy changing reproduction equalizing characteristics by the switching signal. CONSTITUTION:A reference signal from oscillator 6 is recorded on tape 1 at a fixed level by way of recording amplifier 7 and recording head 8 and reproduced by reproducing head 2. The reproduced reference signal is amplified by reproducing amplifier 3 and changed by rectifying circuit 10 into a DC signal, which is supplied to level detector 9 composed of a Schmitt circuit, etc. This detector 9, when the level of the DC signal from rectifying circuit 10, i.e., that of the reference signal generated by head 2 reaches a fixed value, generates an output and operates to apply a control signal to reproducting equalizing change-over circuit 5 and when detector 9 generates the output, change-over circuit 5 changes equalizing characteristics automatically.
JP5709879A 1979-05-11 1979-05-11 Magnetic recording and reproducing device Pending JPS55150122A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5709879A JPS55150122A (en) 1979-05-11 1979-05-11 Magnetic recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5709879A JPS55150122A (en) 1979-05-11 1979-05-11 Magnetic recording and reproducing device

Publications (1)

Publication Number Publication Date
JPS55150122A true JPS55150122A (en) 1980-11-21

Family

ID=13046024

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5709879A Pending JPS55150122A (en) 1979-05-11 1979-05-11 Magnetic recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS55150122A (en)

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees