Self-equalization method for partial-response maximum-likelihood disk drive systems
US5426541A · kind A · utility
21Cited by
16References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1994 |
| Grant date | Jun 20, 1995 |
| Priority date | — |
| Expiry date | Mar 31, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/09
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Apparatus and method for providing equalization adjustment for a filter are provided in a PRML data channel. A first predetermined test pattern is written. Relative error is measured in both magnitude and phase for predetermined frequencies. A relative magnitude ratio for the predetermined frequencies and a phase delay between the predetermined frequencies are identified. A tap set is generated having predefined frequency responses at a plurality of predefined discrete frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.