Adjacent magnetoresistive read head and method for obtaining position error signal
US7405907B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 3, 2004 |
| Grant date | Jul 29, 2008 |
| Priority date | — |
| Expiry date | Mar 8, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3903
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A read head for reading magnetically stored data in adjacent tracks of a medium has at least two elongate bodies, each having at least one magnetoresistive part. The magnetoresistive parts have sensor portions defined along a length of the elongate bodies, by electrical connections to the magnetoresistive parts. A shield is provided at least on opposite transfer sides of the elongate bodies. The read head is used for calculating a position error signal by calculating a correlation between signals received from the respective sensor portions when the head is positioned over adjacent tracks on the medium, with one of the sensors positioned near a boundary between the tracks. The position error is calculated by determining the correlation between signals from the respective sensor portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.