Current-sense bias circuit for a magnetoresistive head and method of sensing a current therethrough
US7251091B2 · kind B2 · utility
4Cited by
4References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2003 |
| Grant date | Jul 31, 2007 |
| Priority date | — |
| Expiry date | Dec 30, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0018
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides a current-sense bias circuit for use with a magnetoresistive head. In one embodiment, the current-sense bias circuit includes a voltage biasing portion configured to provide a bias voltage across the magnetoresistive head thereby establishing a bias current through the magnetoresistive head. Additionally, the current-sense bias circuit also includes a current sensing portion coupled to the voltage biasing portion and configured to sense a change in the bias current based on a resistivity change of the magnetoresistive head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.