Robust servo demodulation filtering method
US6678110B2 · kind B2 · utility
30Cited by
11References
27Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 30, 2001 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | May 8, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59655
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A robust and efficient method for determining the location of a transducer head in a mass storage system. A position-indicative signal characterized by a fundamental frequency F is received from a data path including the transducer head. Energy in the signal at frequencies smaller than F/10 is substantially attenuated by a special filter, which may be an analog or digital differentiator. A sequence of bits indicative of the transducer head position indicator is then extracted from the digitized, filtered signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.