DESIGN OF LOW-PASS CHEBYSHEV FILTER

step 1:choose the type of transformation

step 2:Calculate the attenuation constant

step 3:calculate the ratio of analog frequencies

step 4:Decide the order of filter N such that

step 5:Calculate the analog frequency

step 6:Determine the analog transfer function which is given by

When N is odd, H(s) is given by

where,

step 7:Using chosen transformation, the digital transfer function is determined

Example 1

The specifications of the desired low pass filter is

Design a Chebyshev digital filter using bilinear transformation