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JPS5794922A - Magnetic resistance effect type head - Google Patents

Magnetic resistance effect type head

Info

Publication number
JPS5794922A
JPS5794922A JP17171080A JP17171080A JPS5794922A JP S5794922 A JPS5794922 A JP S5794922A JP 17171080 A JP17171080 A JP 17171080A JP 17171080 A JP17171080 A JP 17171080A JP S5794922 A JPS5794922 A JP S5794922A
Authority
JP
Japan
Prior art keywords
magnetic resistance
elements
waveform
output
outputs
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
JP17171080A
Other languages
Japanese (ja)
Inventor
Shigeyuki Iwatani
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 JP17171080A priority Critical patent/JPS5794922A/en
Publication of JPS5794922A publication Critical patent/JPS5794922A/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
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
    • G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
    • G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
    • G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
    • G11B5/3945—Heads comprising more than one sensitive element
    • G11B5/3948—Heads comprising more than one sensitive element the sensitive elements being active read-out elements
    • G11B5/3951—Heads comprising more than one sensitive element the sensitive elements being active read-out elements the active elements being arranged on several parallel planes
    • G11B5/3954—Heads comprising more than one sensitive element the sensitive elements being active read-out elements the active elements being arranged on several parallel planes the active elements transducing on a single track

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)

Abstract

PURPOSE:To improve the density of information storage by reducing the width of the output waveform of a center magnetic resistance element by adding the output of the center magnetic resistance and the outputs of two other magnetic resistance elements at both sides with the opposite phases. CONSTITUTION:Three magnetic resistance elements 1, 2 and 3 are arranged between shield layers 5 and 6; and sense currents are flowed to the elements 1 and 2 in the same direction and to the element 3 in the opposite direction. Therefore, the magnetic resistance elements receive bias magnetic fields mutually. In addition, the elements 2 and 3 generate reproduction outputs E2 and E3 less than the reproduction output E1 of the element 1. Therefore, the element 2 has the opposite bias magnetization direction to that of the element 1, so a voltage waveform out of phase with that of the element is generated and the element 3 has the same bias magnetization direction with the element 1 to generate a voltage waveform in phase with that of the element 1. Those voltage waveforms are added together by an operational amplifier 7 to obtain the composite waveform E0 of the outputs of the elements 1, 2 and 3, i.e., an output waveform less in width than the output waveform E1 of the element 1.
JP17171080A 1980-12-05 1980-12-05 Magnetic resistance effect type head Pending JPS5794922A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17171080A JPS5794922A (en) 1980-12-05 1980-12-05 Magnetic resistance effect type head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17171080A JPS5794922A (en) 1980-12-05 1980-12-05 Magnetic resistance effect type head

Publications (1)

Publication Number Publication Date
JPS5794922A true JPS5794922A (en) 1982-06-12

Family

ID=15928235

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17171080A Pending JPS5794922A (en) 1980-12-05 1980-12-05 Magnetic resistance effect type head

Country Status (1)

Country Link
JP (1) JPS5794922A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0348027A2 (en) * 1988-06-21 1989-12-27 Hewlett-Packard Company Magneto-resistive sensor with opposing currents for reading perpendicularly recorded media

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0348027A2 (en) * 1988-06-21 1989-12-27 Hewlett-Packard Company Magneto-resistive sensor with opposing currents for reading perpendicularly recorded media

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