Question

For non-minimum phase systems:

(a) Poles and zeroes must lie on the right s-plane

(b) Zeroes must lie on right of s-plane

(c) Both lie on left of s-plane

(d) Poles must be on the left and zeroes can be on the right s –plane.

I have been asked this question in an online interview.

I would like to ask this question from All-pass and Minimum-phase Systems topic in chapter Frequency Response Analysis of Control Systems

Answer 1

Right answer is (d) Poles must be on the left and zeroes can be on the right s –plane.

Easy explanation: For non-minimum phase systems poles must be on the left and zeroes can be on the right s –plane.