JPS5671A - Self tracking system for magnetic disc unit - Google Patents

Self tracking system for magnetic disc unit

Info

Publication number
JPS5671A
JPS5671A JP7395279A JP7395279A JPS5671A JP S5671 A JPS5671 A JP S5671A JP 7395279 A JP7395279 A JP 7395279A JP 7395279 A JP7395279 A JP 7395279A JP S5671 A JPS5671 A JP S5671A
Authority
JP
Japan
Prior art keywords
servo
magnetic
magnetic head
signal
tracking system
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
JP7395279A
Other languages
Japanese (ja)
Inventor
Shigeru Arai
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 JP7395279A priority Critical patent/JPS5671A/en
Publication of JPS5671A publication Critical patent/JPS5671A/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
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks

Landscapes

  • Moving Of The Head To Find And Align With The Track (AREA)

Abstract

PURPOSE:To increase the accuracy of servo control and the recording density, by using the magnetic head consisting of two magnetic heads closed so that the magnetic gaps can be arranged, and obtaining the servo signal of level zero on the desired track. CONSTITUTION:The magnetic head 12 consists of two magnetic heads 16, 18 in which the magnetic gaps 15, 17 are located closely to be arranged. The voltage signals V1, V2 obtained from the coils 20, 21 of each magnetic head are respectively fed to the addition circuit 24 and the subtraction circuit 25. The output of the addition circuit 24 is picked up as readout signal. On the other hand, the output V1-V2 of the subtraction circuit 25 is picked up as the servo signal Sc via the filter for only DC component and fed to the servo unit 14. The servo unit 14 performs position control of the magnetic head 12 so that the signal Sc is at zero level after desired track is detected. Thus, the accuracy and recording density of servo control can be increased.
JP7395279A 1979-06-14 1979-06-14 Self tracking system for magnetic disc unit Pending JPS5671A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7395279A JPS5671A (en) 1979-06-14 1979-06-14 Self tracking system for magnetic disc unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7395279A JPS5671A (en) 1979-06-14 1979-06-14 Self tracking system for magnetic disc unit

Publications (1)

Publication Number Publication Date
JPS5671A true JPS5671A (en) 1981-01-06

Family

ID=13532921

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7395279A Pending JPS5671A (en) 1979-06-14 1979-06-14 Self tracking system for magnetic disc unit

Country Status (1)

Country Link
JP (1) JPS5671A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6196576A (en) * 1984-10-17 1986-05-15 Nec Corp Magnetic recording device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6196576A (en) * 1984-10-17 1986-05-15 Nec Corp Magnetic recording device

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