Disk drive employing comb filter for repeatable fly height compensation
US7916420B1 · kind B1 · utility
128Cited by
72References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 14, 2010 |
| Grant date | Mar 29, 2011 |
| Priority date | — |
| Expiry date | May 14, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/6064
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of tracks. The disk drive further comprises a fly height actuator operable to adjust a fly height of the head. A fly height measurement (FHM) is generated for the head, and a fly height error (FHE) is generated as a difference between the FHM and a target fly height. A comb filter is used to generate fly height compensation values in response to the FHE, and a fly height control signal is generated in response to the FHE and the fly height compensation values, wherein the fly height control signal is applied to the fly height actuator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.