Field device with capability of calculating digital filter coefficients
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United States of America Patent
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Oct 30, 2012
Grant Date -
Feb 26, 2009
app pub date -
Aug 23, 2007
filing date -
Aug 23, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A digital filter design algorithm is implemented directly within a process control field device or other process related equipment. Filter design parameters are exposed so that filter design parameter values may be provided to the digital filter design algorithm so that the digital filter design algorithm may calculate digital filter coefficients for a digital filter having desired frequency response characteristics. The digital filter design parameter values may be provided by a user, or may be provided as process variable data output from a process control field device or other process related equipment. Once the coefficients of the digital filter having the desired frequency response characteristics have been calculated, the digital filter may be applied to process variable data received by the process control field device or other process related equipment.
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