JPS57109109A - Magnetic disc device - Google Patents

Magnetic disc device

Info

Publication number
JPS57109109A
JPS57109109A JP18680480A JP18680480A JPS57109109A JP S57109109 A JPS57109109 A JP S57109109A JP 18680480 A JP18680480 A JP 18680480A JP 18680480 A JP18680480 A JP 18680480A JP S57109109 A JPS57109109 A JP S57109109A
Authority
JP
Japan
Prior art keywords
head
ferrite
output
core member
maximum
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
JP18680480A
Other languages
Japanese (ja)
Inventor
Kazuyuki Seki
Shigemitsu Hamazaki
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP18680480A priority Critical patent/JPS57109109A/en
Publication of JPS57109109A publication Critical patent/JPS57109109A/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
    • G11B5/012—Recording on, or reproducing or erasing from, magnetic disks

Landscapes

  • Digital Magnetic Recording (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Magnetic Heads (AREA)

Abstract

PURPOSE:To eliminate trouble to a dynamic range of a recording signal reproduction system circuit, by using a material with more excellent magnetic characteristics than a core member of an outer head as the core member of an inner head. CONSTITUTION:Since the magnetic characteristics of an Mn-Zn ferrite is more excellent than those of an Ni-Zn ferrite, the former has greater maximum head output. In any case, the head output of the outer head is greater than that of the inner head. When the core member of the inner head is the same as that of the outer head, the maximum reproduction output of the outer head is greater than that of the inner head by 1.54-2.84 times. When the Mn-Zn ferrite is used for the inner head and the Ni-Zn ferrite for the outer head, the difference of the maximum reproduction output between the both heads can remarkably be reduced than conventional methods. Thus, the requirements to the dynamic range of a recording signal reproduction system circuit can be mitigated and the design can be made easy.
JP18680480A 1980-12-26 1980-12-26 Magnetic disc device Pending JPS57109109A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18680480A JPS57109109A (en) 1980-12-26 1980-12-26 Magnetic disc device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18680480A JPS57109109A (en) 1980-12-26 1980-12-26 Magnetic disc device

Publications (1)

Publication Number Publication Date
JPS57109109A true JPS57109109A (en) 1982-07-07

Family

ID=16194872

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18680480A Pending JPS57109109A (en) 1980-12-26 1980-12-26 Magnetic disc device

Country Status (1)

Country Link
JP (1) JPS57109109A (en)

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