Automatic closed loop adjustment of analog read signals under microprocessor control
US5383064A · kind A · utility
11Cited by
5References
30Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 13, 1993 |
| Grant date | Jan 17, 1995 |
| Priority date | — |
| Expiry date | Apr 13, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/182
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A closed loop resolution enhancement technique for reducing density effects to permit increased digital data storage density on magnetic media and improve data reliability for at a given density, uses a predetermined test pattern written on the medium to determine the ratio of amplitudes of high and low frequency components of the test pattern and adjust a resolution value. After a test pattern read operation is used to adjust the resolution value, the same value is used during normal data recovery operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.