Magnetic disk apparatus and method that reverses sense current in magnetoresistive head
US5894375A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 19, 1996 |
| Grant date | Apr 13, 1999 |
| Priority date | — |
| Expiry date | Mar 19, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59683
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Recording signals can be reproduced without needing a deviation of a recording magnetic pole and a magneto-resistive element in a track width direction and without causing an off-track in a whole region from the inner side to the outer side. A sense current supplying circuit which supplies a predetermined sense current to the magneto-resistive element and can switch the direction of the sense current is provided. By control means such as an MPU or the like, the direction of the sense current by the sense current supplying circuit is switched in accordance with a cylinder position of a combination head, thereby magnetically changing the center position of a reproducing sensitivity of the magneto-resistive element in a track width direction. The combination head has a structure such that a geometrical center position of the magneto-resistive element in a read head and a geometrical center position of a recording magnetic pole in a write head are made to coincide in the track direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.