Question

What is the pass band gain of a low pass filter with 1- δP as the pass band attenuation?

(a) -20log(1- δP)

(b) -20log(δP)

(c) 20log(δP)

(d) 20log(1- δP)

I had been asked this question during an internship interview.

I would like to ask this question from Specifications and Classification of Analog Filters in portion Digital Filters Design of Digital Signal Processing

Answer 1

Correct option is (d) 20log(1- δP)

Explanation: If 1-δP is the pass band attenuation, then the pass band gain is given by the formula  20log(1-δP).