Question: what are the distinguishing features of an elliptical filter?
Answer: What are the distinguishing features of an elliptical filter? An elliptic filter (also known as a Cauer filter, named after Wilhelm Cauer, or as a Zolotarev filter, after Yegor Zolotarev) is a signal processing filter with equalized ripple (equiripple) behavior in both the passband and the stopband.