Field ratioing demodulation circuit for a null-type servo pattern
US6469849B1 · kind B1 · utility
18Cited by
21References
3Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 5, 2000 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Jan 2, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59655
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of generating a position error estimate generates a phase field signal and a position error field signal. A set of operations is performed on the phase field signal and the same set of operations is performed on the position error field signal. The result obtained by performing the set of operations on the position error field signal is divided by the results obtained by performing the set of operations on the phase field signal. The result of the division is the position error estimate. In addition, a demodulation circuit is provided that utilizes field ratioing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.