Question

Type-2 chebyshev filters consists of ______________

(a) Only poles

(b) Both poles and zeros

(c) Only zeros

(d) Cannot be determined

This question was posed to me in a job interview.

Query is from Characteristics of Commonly Used Analog Filters in chapter Digital Filters Design of Digital Signal Processing

Answer 1

The correct option is (b) Both poles and zeros

To explain: Type-1 chebyshev filters are all-pole filters where as the family of type-2 chebyshev filters contains both poles and zeros.