Which filter produces the least distortion of digital signals?
A) Butterworth
B) Chebyshev
C) Bessel
D) elliptic

Question

Quizplus · Accepted Answer

Bessel filter has the characteristics of providing linear phase response which means the phase shift is not a function of frequency, resulting in least amount of distortion of digital signals. On the other hand, Butterworth filter provides a flatter frequency response but introduces some phase shifting which causes some signal distortion. Chebyshev and elliptic filters provide steeper cutoffs but introduce ringing or ripple in the passband and stopband which can cause distortion as well.

Which Filter Produces the Least Distortion of Digital Signals