Virtual filter-bandwidth reduction and frequency stabilization via heterodyning
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United States of America Patent
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Issued Date -
Dec 19, 2002
app pub date -
May 23, 2002
filing date -
May 23, 2001
priority date (Note) -
Abandoned
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Abstract
A virtual filter-bandwidth reduction and frequency stabilization via heterodyning shifts the signal to be filtered up and down as it passes through two cascaded fixed filters whereas the alternative structure shifts the filter center frequencies of two cascaded filters up and down respectively and leaves the signal to be filtered alone. Two identical cascaded fixed filters are used to provide the filtering.
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