Disk drive employing a sync mark detector comprising a matched filter and a dual polarity correlator
US6603622B1 · kind B1 · utility
217Cited by
13References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2001 |
| Grant date | Aug 5, 2003 |
| Priority date | — |
| Expiry date | Dec 1, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention may be regarded as a disk drive comprising a disk having a plurality of data tracks, each data track comprising a plurality of sectors. A sync mark detector detects a sync mark pattern in a sector by filtering a read signal with a matched filter having an impulse response substantially matched to a dibit response of the disk drive. The output of the matched filter is correlated with a dual polarity correlator to generate first and second correlated signals. The sync mark pattern is detected when either the first or second correlated signals exceeds a threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.