Stray field detector, magnetic disk drive, and method of head escaping
US7289284B2 · kind B2 · utility
7Cited by
2References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 1, 2005 |
| Grant date | Oct 30, 2007 |
| Priority date | — |
| Expiry date | Dec 6, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Embodiments of the invention prevent demagnetization or degaussing of recorded magnetizations, even if a stray field is applied. In one embodiment, an output of a read head including a magneto-resistive effect element is inputted to a stray field detector through a DC amplifier and a DC filter. The stray field detector monitors dc components of the output from the read head, and escapes a head from above a magnetic recording medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.