Digital
Filter Problem
Problem
Freq4P11
Name_______________________________________
You have a digital filter that implements the following difference equation.
xk+1
= 0.92xk + 0.08uk
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x is the output.
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u is the input.
This difference equation is in a loop that operates at .2 second intervals.
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What is the time constant
being implemented?
In puttering with this
filter, the user inadvertently changes the timing to 0.1 seconds and 0.5
seconds.
-
What is the time constant
being implemented when these changes are made?
Sketch the response (all cases) when the input is
a constant.