JPS56159806A - Magnetic disc device - Google Patents

Magnetic disc device

Info

Publication number
JPS56159806A
JPS56159806A JP6435480A JP6435480A JPS56159806A JP S56159806 A JPS56159806 A JP S56159806A JP 6435480 A JP6435480 A JP 6435480A JP 6435480 A JP6435480 A JP 6435480A JP S56159806 A JPS56159806 A JP S56159806A
Authority
JP
Japan
Prior art keywords
recording
head
circuit
current
magnetic disc
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
JP6435480A
Other languages
Japanese (ja)
Inventor
Munehito Kumagai
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP6435480A priority Critical patent/JPS56159806A/en
Publication of JPS56159806A publication Critical patent/JPS56159806A/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
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/027—Analogue recording
    • G11B5/035—Equalising

Landscapes

  • Recording Or Reproducing By Magnetic Means (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE:To improve the S/N of reproduction signals by providing a simple control circuit before a magnetic head and performing recording with the recording current value close to optimum current. CONSTITUTION:A recording signal is transmitted via an input terminal 1 and a modulating circuit 2 to a control circuit 9. The circuit 9 is for changing the output signal of the circuit 2 by the relative positions of a magnetic head 5 and a magnetic disc, and has pulse applying terminals A, B, C. Its output terminal is connected to the input terminal of a recording amlifier 3. The amplifier 3 performs amplifying necessary for flowing current to the head 5, and is connected to the head 5 via a recording-reproducing change-over circuit 4. With such constitution, the output value of the circuit 2 is changed every time when the head 5 comes to a prescribed track group and therefore, recording is made by the current close to the optimum recording current value in the relative positions of the head 5 and the magnetic disc; hence, the S/N of the reproduction signal is improved.
JP6435480A 1980-05-15 1980-05-15 Magnetic disc device Pending JPS56159806A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6435480A JPS56159806A (en) 1980-05-15 1980-05-15 Magnetic disc device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6435480A JPS56159806A (en) 1980-05-15 1980-05-15 Magnetic disc device

Publications (1)

Publication Number Publication Date
JPS56159806A true JPS56159806A (en) 1981-12-09

Family

ID=13255822

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6435480A Pending JPS56159806A (en) 1980-05-15 1980-05-15 Magnetic disc device

Country Status (1)

Country Link
JP (1) JPS56159806A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6087406A (en) * 1983-10-19 1985-05-17 Rohm Co Ltd Floppy disk device
JPH01229467A (en) * 1988-03-09 1989-09-13 Gunma Nippon Denki Kk Floppy disk device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5188003A (en) * 1975-01-29 1976-08-02
JPS5345016B2 (en) * 1974-06-18 1978-12-04

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5345016B2 (en) * 1974-06-18 1978-12-04
JPS5188003A (en) * 1975-01-29 1976-08-02

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6087406A (en) * 1983-10-19 1985-05-17 Rohm Co Ltd Floppy disk device
JPH01229467A (en) * 1988-03-09 1989-09-13 Gunma Nippon Denki Kk Floppy disk device

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