Lab Report 10 Digital IIR filter design Iowa State University E E 324

Section: C




Lab Report #10
Digital IIR filter design




Suhuai Song
258284026
04/15/13
1.Introduction:
In this lab, we will learn how to design a digital infinite-impulse-response filter (IIR
filter). We will use the method such as digital conversion of analog filters. This
method starts off with the frequency characteristics (i.e. Fourier transform) of an
analog filter (prototype). The digital filter is obtained as a “discrete approximation”
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, of the analog filter. Such a discrete approximation can be found by one of the
transformations studied in Lab 6. In this lab, we will use the bilinear (or trapezoidal,
or Tustin approximation) to find the transfer function for filters.

2.Procedure:
1). Part 1: Lab Assignment.
.
Figure 1:




.
Code:




Transfer Function:




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