JPS5794964A - Magnetic disk device - Google Patents
Magnetic disk deviceInfo
- 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
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.
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)
| 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 |
-
1980
- 1980-12-01 JP JP17003780A patent/JPS5794964A/en active Pending
Cited By (4)
| 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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