Method and apparatus for servo control in a disk drive
US7312946B2 · kind B2 · utility
10Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2006 |
| Grant date | Dec 25, 2007 |
| Priority date | — |
| Expiry date | Apr 27, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59688
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
According to one embodiment, in a disk drive which performs positioning control of a head on the basis of a servo burst pattern recorded on a disk medium, a servo processor generates a tangent-equivalent value by using a burst value obtained from the servo burst pattern. Furthermore, the servo processor executes an arctangent transform process by an inverse function approximate expression structured on the basis of a relationship between an off-track position and the tangent-equivalent value to detect the off-track position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.