JPS5794964A - Magnetic disk device - Google Patents

Magnetic disk device

Info

Publication number
JPS5794964A
JPS5794964A JP17003780A JP17003780A JPS5794964A JP S5794964 A JPS5794964 A JP S5794964A JP 17003780 A JP17003780 A JP 17003780A JP 17003780 A JP17003780 A JP 17003780A JP S5794964 A JPS5794964 A JP S5794964A
Authority
JP
Japan
Prior art keywords
head
alignment
dipulse
tracks
beta
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
JP17003780A
Other languages
Japanese (ja)
Inventor
Keizo Tashiro
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP17003780A priority Critical patent/JPS5794964A/en
Publication of JPS5794964A publication Critical patent/JPS5794964A/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

  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)

Abstract

PURPOSE:To facilitate the correction of a position shift even after the whole module is replaced, by correcting the large position shift of a data head by providing an alignment track, wider than an ordinary track, to a disk. CONSTITUTION:When the address of a data head 8 in a shield module 5 is set in a head address register 21 by an instruction from a host device 19, pieces of information on alignment tracks 2 and 3 read by the head 8 are amplified by a readout amplifier 24 and inputted to an alignment signal demodulating circuit 25. At this time, the head 8 is not always position at an intermediate point between the alignment tracks 2 and 3. For this purpose, an alignment signal demodulating circuit 25 outputs a dipulse beta which corresponds to a couple of inverted magnetization pulses of the tracks 2 and 3, and a subtracting circuit 35 calculates and outputs a difference in peak value between the dipulse beta and a dipulse gamma as a DC voltage. This DC voltage is equivalent to the extent of the shift of the data head.
JP17003780A 1980-12-01 1980-12-01 Magnetic disk device Pending JPS5794964A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17003780A JPS5794964A (en) 1980-12-01 1980-12-01 Magnetic disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17003780A JPS5794964A (en) 1980-12-01 1980-12-01 Magnetic disk device

Publications (1)

Publication Number Publication Date
JPS5794964A true JPS5794964A (en) 1982-06-12

Family

ID=15897431

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17003780A Pending JPS5794964A (en) 1980-12-01 1980-12-01 Magnetic disk device

Country Status (1)

Country Link
JP (1) JPS5794964A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0224379A2 (en) * 1985-11-20 1987-06-03 Seagate Technology, Inc. Compensation method to correct thermally induced off-track errors in disc drives
US6372977B1 (en) 1998-11-10 2002-04-16 Citizen Watch Co., Ltd. Electronic apparatus with a solar battery
US6521822B2 (en) 2000-03-21 2003-02-18 Citizen Watch Co., Ltd. Electronic unit
US7136138B1 (en) 1998-12-22 2006-11-14 Citizen Watch Co., Ltd. Liquid crystal display device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0224379A2 (en) * 1985-11-20 1987-06-03 Seagate Technology, Inc. Compensation method to correct thermally induced off-track errors in disc drives
US6372977B1 (en) 1998-11-10 2002-04-16 Citizen Watch Co., Ltd. Electronic apparatus with a solar battery
US7136138B1 (en) 1998-12-22 2006-11-14 Citizen Watch Co., Ltd. Liquid crystal display device
US6521822B2 (en) 2000-03-21 2003-02-18 Citizen Watch Co., Ltd. Electronic unit

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