JPS56134362A - Position signal generating circuit for magnetic disk device - Google Patents

Position signal generating circuit for magnetic disk device

Info

Publication number
JPS56134362A
JPS56134362A JP3755380A JP3755380A JPS56134362A JP S56134362 A JPS56134362 A JP S56134362A JP 3755380 A JP3755380 A JP 3755380A JP 3755380 A JP3755380 A JP 3755380A JP S56134362 A JPS56134362 A JP S56134362A
Authority
JP
Japan
Prior art keywords
signal
signals
servo
accordance
target track
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
JP3755380A
Other languages
Japanese (ja)
Other versions
JPS6258069B2 (en
Inventor
Toshiaki Hattori
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP3755380A priority Critical patent/JPS56134362A/en
Publication of JPS56134362A publication Critical patent/JPS56134362A/en
Publication of JPS6258069B2 publication Critical patent/JPS6258069B2/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
    • 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

  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Moving Of Head For Track Selection And Changing (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)
  • Control Of Position Or Direction (AREA)

Abstract

PURPOSE:To expand a range where a magnetic head is led onto the target track, by forming plural position signals from two-phase servo-information from the servo- head, and selecting a position signal in accordance with a command signal of the target track. CONSTITUTION:The servo-information detection part 60 generates signals A-D which are periodically varied in accodance with the position of the servo-head 20, generates position signals E-H which are out of phase by 90 deg. each in accordance with said signals A-D, and sends them out to the selective part 70. In case when a signal EVEN becomes high and the target track is an odd track, the selective part 70 selects and outputs one of the signals F, H in accordance with the polarity of the signal E or G, and also in case when the signal EVEN becomes low and the target track is an even track, the selective part 70 selects and outputs one of the signals E, G in accordance with the polarity of the signal F or H. The range where leading-in can be made is expanded by using this output position signal M.
JP3755380A 1980-03-26 1980-03-26 Position signal generating circuit for magnetic disk device Granted JPS56134362A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3755380A JPS56134362A (en) 1980-03-26 1980-03-26 Position signal generating circuit for magnetic disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3755380A JPS56134362A (en) 1980-03-26 1980-03-26 Position signal generating circuit for magnetic disk device

Publications (2)

Publication Number Publication Date
JPS56134362A true JPS56134362A (en) 1981-10-21
JPS6258069B2 JPS6258069B2 (en) 1987-12-03

Family

ID=12500705

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3755380A Granted JPS56134362A (en) 1980-03-26 1980-03-26 Position signal generating circuit for magnetic disk device

Country Status (1)

Country Link
JP (1) JPS56134362A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61214285A (en) * 1985-03-20 1986-09-24 Toshiba Corp Formation of servo pattern
EP0299084A1 (en) * 1987-01-27 1989-01-18 Fujitsu Limited Circuitry and method for controlling positioning of a head in a data storage device
EP0492775A2 (en) * 1990-12-25 1992-07-01 Fujitsu Limited Method and Apparatus for positioning head on target cylinder of disk
US5571377A (en) * 1993-06-08 1996-11-05 Kvaerner Pulping Technologies Ab Process for peroxide bleaching of chemical pulp in a pressurized bleach vessel

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61214285A (en) * 1985-03-20 1986-09-24 Toshiba Corp Formation of servo pattern
EP0299084A1 (en) * 1987-01-27 1989-01-18 Fujitsu Limited Circuitry and method for controlling positioning of a head in a data storage device
EP0492775A2 (en) * 1990-12-25 1992-07-01 Fujitsu Limited Method and Apparatus for positioning head on target cylinder of disk
US5311379A (en) * 1990-12-25 1994-05-10 Fujitsu Limited Method and system for positioning head on target cylinder of disk
US5571377A (en) * 1993-06-08 1996-11-05 Kvaerner Pulping Technologies Ab Process for peroxide bleaching of chemical pulp in a pressurized bleach vessel

Also Published As

Publication number Publication date
JPS6258069B2 (en) 1987-12-03

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