Question

What is the number of minima’s present in the pass band of magnitude frequency response of a low pass chebyshev-I filter of order 4?

(a) 1

(b) 2

(c) 3

(d) 4

The question was asked in an internship interview.

The above asked question is from Chebyshev Filters in portion Digital Filters Design of Digital Signal Processing

Answer 1

The correct choice is (b) 2

To explain: In the magnitude frequency response of a low pass chebyshev-I filter, the pass band has 2 maxima and 2 minima(order 4=2 maxima+2 minima).