Digital
Filter Problem
Problem
Freq4P09
Name_______________________________________
You have a digital filter that implements the following difference equation.
xk+1
= 0.8xk + 0.2uk
This difference equation is in a loop that operates at 1 second intervals.
-
What is the time constant
being implemented?
In puttering with this
filter, the user inadvertently changes the timing to 0.5 seconds and 0.25
seconds.
-
What is the time constant
being implemented?
Sketch the response (both cases) when the input is
a constant.