Method and apparatus for determining the error rate of magnetic recording disk drives having a amplitude sampling data detection
US5121263A · kind A · utility
59Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1989 |
| Grant date | Jun 9, 1992 |
| Priority date | — |
| Expiry date | Oct 31, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B27/36
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a disk drive providing amplitude sampling data detection, the amplitude of an analog read back signal is sampled at data clock intervals. The resulting analog values are converted to digital equivalent values. The digital equivalent values are each compared to an expected digital values that is representative of the data that was originally recorded on the disk, to thereby generate a different value. The resulting collection of difference values are magnitude segregated, and then stored in a plurality of registers, for later use in providing a histogram that is a measure of the disk drive's read error rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.