Digital focus servo system with a sliding notch filter
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United States of America Patent
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-
Aug 30, 2005
Issued Date -
N/A
app pub date -
Sep 10, 2001
filing date -
Jan 25, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A notch filter that filters a focus error signal during a multi-track seek operation is presented. The notch filter has a center frequency that relates to the seek reference velocity of a multi-rack seek algorithm. During the multi-track seek operation, a focus control signal is calculated from the filtered focus error signal from the notch filter.
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