Method and apparatus for error recovery for unstable magnetorestrictive heads
US5661614A · kind A · utility
6Cited by
10References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 6, 1995 |
| Grant date | Aug 26, 1997 |
| Priority date | — |
| Expiry date | Feb 6, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0016
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus is disclosed for recovering data with unstable low amplitude magnetorestrictive heads. After an error in data recovery is detected a technique is invoked that changes the bias current through the magnetoresistive head to the reverse direction in a predetermined manner. The method includes reversing the bias current direction, returning the bias current to its normal state and reading the data from the storage medium. Alternatively, the method includes reversing the bias current direction and reading the data when the bias current direction is reversed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.