Question

Which of the following is the band edge value of |H(Ω)|^2?

(a) (1+ε^2)

(b) (1-ε^2)

(c) 1/(1+ε^2)

(d) 1/(1-ε^2)

I have been asked this question during an online exam.

This is a very interesting question from Characteristics of Commonly Used Analog Filters in chapter Digital Filters Design of Digital Signal Processing

Answer 1

The correct option is (c) 1/(1+ε^2)

To explain: 1/(1+ε^2) gives the band edge value of the magnitude square response |H(Ω)|^2.