Apparatus and method for adjusting filter frequency in relation to sampling frequency
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United States of America Patent
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Issued Date -
Sep 5, 2002
app pub date -
Mar 1, 2002
filing date -
Mar 3, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A self-tuning filter is disclosed. The self-tuning filter includes a digital clocking signal and an input coupled to the digital clocking signal, whereby the input reads a value incident on the input when the digital clocking signal changes to a predetermined state. A clock-tunable filter is, furthermore, coupled to the digital clocking signal so that the frequency of the clock-tunable filter is adjusted in relation to a sampling frequency at which the digital clocking signal operates. The self-tuning filter may be applied to an input of a data acquisition unit and applied to an input having a variable sampling frequency. A method of controlling the frequency of a clock-tunable filter is also disclosed.
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