Data detection methods and apparatus for a direct access storage device
US5619539A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1994 |
| Grant date | Apr 8, 1997 |
| Priority date | — |
| Expiry date | Feb 28, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10009
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are provided for maximum-likelihood data detection in a partial-response (PR) data channel including a head and disk assembly providing an analog signal coupled to an analog to digital converter (ADC) providing digital samples. A plurality of digital samples are received from the ADC. The received digital samples are applied to a selected first filter and a selected second filter. The first filtered digital samples are applied to a first data detector, and the second filtered digital samples are applied to a second data detector. A predetermined parameter is identified, and at least one of the first and second data detectors is selected responsive to the identified predetermined parameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.