JPS56134367A - Disk device - Google Patents

Disk device

Info

Publication number
JPS56134367A
JPS56134367A JP2012380A JP2012380A JPS56134367A JP S56134367 A JPS56134367 A JP S56134367A JP 2012380 A JP2012380 A JP 2012380A JP 2012380 A JP2012380 A JP 2012380A JP S56134367 A JPS56134367 A JP S56134367A
Authority
JP
Japan
Prior art keywords
servo
data
error signal
position error
circuit
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
JP2012380A
Other languages
Japanese (ja)
Inventor
Masayoshi Kamo
Shigemasa Yoshida
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 JP2012380A priority Critical patent/JPS56134367A/en
Publication of JPS56134367A publication Critical patent/JPS56134367A/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
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/08—Track changing or selecting during transducing operation
    • G11B21/081—Access to indexed tracks or parts of continuous track
    • G11B21/083—Access to indexed tracks or parts of continuous track on discs
    • G11B21/085—Access to indexed tracks or parts of continuous track on discs with track following of accessed part

Landscapes

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

Abstract

PURPOSE:To realize a high-precision data surface positioning system by providing an automatic gain control amplifying circuit to both a servo disk and not less than one data disk so that an output voltage ratio to a shift in track between information reproduced from the servo disk and that reproduced from not less than one data disks. CONSTITUTION:Servo surface information reproduced by servo head 6 is amplified 11 and servo automatic gain control amplifying circuit (S.AGC)12 generates a servo head position error signal with the gain where a maximum amplitude value in one- track movement is obtained. Then, this signal is differentiated by speed detecting circuit 13 and sent to summing amplifier 14 and at the same time, the output of S.AGC12 is inputted to data head position shift correcting circuit 15. Positioning information reproduced by data head 7, on the other hand, is amplified 16 and inputted to data AGC17 to generate a position error signal for unit track shift length from the input information. Thus, the position error signal of data head 7 inputted to circuit 15 is added to or substracted from the servo head position error signal according to its polarity and the result is sent to poststage summing amplifying circuit 14.
JP2012380A 1980-02-20 1980-02-20 Disk device Pending JPS56134367A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2012380A JPS56134367A (en) 1980-02-20 1980-02-20 Disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012380A JPS56134367A (en) 1980-02-20 1980-02-20 Disk device

Publications (1)

Publication Number Publication Date
JPS56134367A true JPS56134367A (en) 1981-10-21

Family

ID=12018337

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2012380A Pending JPS56134367A (en) 1980-02-20 1980-02-20 Disk device

Country Status (1)

Country Link
JP (1) JPS56134367A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62289978A (en) * 1986-05-30 1987-12-16 Yokogawa Hewlett Packard Ltd Servo gain compensation device
US5592347A (en) * 1994-03-15 1997-01-07 Fujitsu Limited Apparatus for measuring offset of head from servo pattern of data surface and disk medium having recorded servo pattern for measurement of offset

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5181603A (en) * 1975-01-14 1976-07-17 Nippon Electric Co JIKIDEISUKUSOCHI
JPS5215309A (en) * 1975-07-24 1977-02-04 Ibm Data memory
JPS54125010A (en) * 1978-03-22 1979-09-28 Mitsubishi Electric Corp Magnetic disc apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5181603A (en) * 1975-01-14 1976-07-17 Nippon Electric Co JIKIDEISUKUSOCHI
JPS5215309A (en) * 1975-07-24 1977-02-04 Ibm Data memory
JPS54125010A (en) * 1978-03-22 1979-09-28 Mitsubishi Electric Corp Magnetic disc apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62289978A (en) * 1986-05-30 1987-12-16 Yokogawa Hewlett Packard Ltd Servo gain compensation device
US5592347A (en) * 1994-03-15 1997-01-07 Fujitsu Limited Apparatus for measuring offset of head from servo pattern of data surface and disk medium having recorded servo pattern for measurement of offset

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