JPS56134366A - Disk device - Google Patents

Disk device

Info

Publication number
JPS56134366A
JPS56134366A JP1702780A JP1702780A JPS56134366A JP S56134366 A JPS56134366 A JP S56134366A JP 1702780 A JP1702780 A JP 1702780A JP 1702780 A JP1702780 A JP 1702780A JP S56134366 A JPS56134366 A JP S56134366A
Authority
JP
Japan
Prior art keywords
servo
error signal
position error
information
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.)
Granted
Application number
JP1702780A
Other languages
Japanese (ja)
Other versions
JPS6245623B2 (en
Inventor
Masayoshi Kamo
Tadashi Sato
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 JP1702780A priority Critical patent/JPS56134366A/en
Publication of JPS56134366A publication Critical patent/JPS56134366A/en
Publication of JPS6245623B2 publication Critical patent/JPS6245623B2/ja
Granted 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
    • G11B21/10—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following

Landscapes

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

Abstract

PURPOSE:To record servo track information in a servo region by setting the recording track density of information, reproduced from a servo disk via a servo head, twice recording track density. CONSTITUTION:Servo surface information reproduced by servo head 4 is amplified 11 and automatic gain control amplifying circuit 12 generates a servo head position error signal from the said information with the gain where a maximum amplitude value in one-track movement is constant. This error signal is differentiated by speed detecting circuit 13 and sent to summing amplifier 14 and at the same time, a servo head position error signal is inputted to data head position shift correcting circuit 15. Positioning information reproduced by data head 5, on the other hand, is amplified 16 and inputted to automatic gain control data amplifying circuit 17 to generate a position error signal for unit track position shift length. Thus, the position error signal inputted to data head position shift correcting circuit 15 is added to or subtracted from the servo head position error signal according to its polarity and the result is sent to poststage summing amplifier circuit 14.
JP1702780A 1980-02-14 1980-02-14 Disk device Granted JPS56134366A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1702780A JPS56134366A (en) 1980-02-14 1980-02-14 Disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1702780A JPS56134366A (en) 1980-02-14 1980-02-14 Disk device

Publications (2)

Publication Number Publication Date
JPS56134366A true JPS56134366A (en) 1981-10-21
JPS6245623B2 JPS6245623B2 (en) 1987-09-28

Family

ID=11932506

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1702780A Granted JPS56134366A (en) 1980-02-14 1980-02-14 Disk device

Country Status (1)

Country Link
JP (1) JPS56134366A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5321564A (en) * 1991-04-30 1994-06-14 Fujitsu Limited Data head offset detecting circuit in magnetic disk unit and magnetic disk unit using said data head offset detecting circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5236009A (en) * 1975-09-17 1977-03-19 Hitachi Ltd Storing method of information for head alignment

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5236009A (en) * 1975-09-17 1977-03-19 Hitachi Ltd Storing method of information for head alignment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5321564A (en) * 1991-04-30 1994-06-14 Fujitsu Limited Data head offset detecting circuit in magnetic disk unit and magnetic disk unit using said data head offset detecting circuit

Also Published As

Publication number Publication date
JPS6245623B2 (en) 1987-09-28

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