User guide

Filters CME 2 User Guide
186 Copley Controls
C.4: Standard Filter Families
C.4.1: Butterworth Filter
A Butterworth filter has two poles for faster roll-off at the cut-off frequency.
Example:
C.4.2: Chebychev Filter
A Chebyshev filter has a faster roll-off than a Butterworth filter, but, as a result of the fast
roll-off, ripple is introduced into the passband frequency.
Example:
C.4.3: Elliptic Filter
Similar to a Chebyshev filter but ripple is introduced into both the passband and the
stopband. It has a faster roll-off than a Chebyshev filter.
Example: