Compensation for repeatable run-out error
US6751045B1 · kind B1 · utility
3Cited by
6References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 12, 2000 |
| Grant date | Jun 15, 2004 |
| Priority date | — |
| Expiry date | Aug 28, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59627
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for compensating for repeatable run-out errors in a disc drive is disclosed. The compensation is created by determining transfer function values for a servo loop in the drive as well as a sequence of repeatable run-out values for a portion of a disc. The repeatable run-out values are divided by respective transfer function values to produce compensation values that are inverse transformed to produce time-domain compensation values. These time-domain compensation values are injected into the servo loop to compensate for repeatable run-out errors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.