Using recorded data for auto calibration of fixed gain of a read amplifier in a data storage device
US5467231A · kind A · utility
6Cited by
16References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1994 |
| Grant date | Nov 14, 1995 |
| Priority date | — |
| Expiry date | Oct 13, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10009
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for using a varying amplitude data signal from a data storage medium such as a magnetic disk or magnetic tape to calibrate the gain of the data signal amplifier to an optimal fixed gain. At initialization, amplified data signal peaks are detected over a data region of the data storage medium. The amplified signal peaks are compared to a predetermined reference. The signal amplifier gain is adjusted until only a few amplified signal peaks exceed the reference. The amplifier gain is then fixed at the final adjusted value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.