High resolution hall effect read head
US4371905A · kind A · utility
5Cited by
9References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1980 |
| Grant date | Feb 1, 1983 |
| Priority date | — |
| Expiry date | Nov 13, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/378
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A differential Hall effect magnetic read head exhibiting improved resolution. The head includes dual Hall elements in which the elements are oriented so that their major surface is perpendicular to the surface of the recording medium and biased so that they respond to the component of magnetic flux which is parallel to the surface of the recording medium. Operation in this manner enables information recorded at extremely high densities to be easily read. In an alternative embodiment, a single Hall element is utilized and direct and delayed outputs are differentially compared in order to detect flux transitions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.