Read equalizer optimization based on the PTR effects to write equalization
US6894858B1 · kind B1 · utility
3Cited by
22References
16Claims
0Family size
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Key dates
| Filing date | Aug 6, 2002 |
| Grant date | May 17, 2005 |
| Priority date | — |
| Expiry date | May 23, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/035
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method for decoding magnetic media. Parallel decoders, each with a different equalization magnitude, are used to decode a read signal. A Viterbi metric is used to determine the direction and magnitude of equalization shift that best compensates for a systematic separation, such as pole tip recession. If optimal equalization has changed, the equalization coefficients of the decoders is shifted to compensate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.