Field ratioing demodulation circuit for a null-type servo pattern
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United States of America Patent
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Oct 22, 2002
Issued Date -
N/A
app pub date -
Sep 5, 2000
filing date -
May 21, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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