Question

Which of the following is the right way to reduce distortion in the DM?

(a) By setting up an integrator in front of DM

(b) By setting up an integrator behind the DM

(c) By setting up an integrator in the middle of DM

(d) None of the mentioned

This question was posed to me during an online interview.

This interesting question is from Sample and Hold in chapter Sampling and Reconstruction of Signals of Digital Signal Processing

Answer 1

Correct choice is (a) By setting up an integrator in front of DM

To explain: We note that increasing Δ reduces overload distortion but increases the granular noise, and vice versa. One way to reduce these two types of distortion is to use an integrator in front of the DM.