Synchronous read channel employing a sequence detector with programmable detector levels
US5844738A · kind A · utility
11Cited by
45References
10Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 19, 1997 |
| Grant date | Dec 1, 1998 |
| Priority date | — |
| Expiry date | Mar 19, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2020/1476
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A synchronous read channel is disclosed which samples an analog read signal from a magnetic read head positioned over a magnetic disk medium, filters the sample values according to a desired partial response, extracts timing information from the filtered sample values, and detects an estimated data sequence from the filtered sample values using a trellis type sequence detector matched to the partial response. The trellis sequence detector comprises programmable detector levels which allows for maximum flexibility in matching the sequence detector to the partial response.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.