Question

Open loop transfer function of a system having one zero with a positive real value is called.

(a) Zero phase function

(b) Negative phase function

(c) Positive phase function

(d) Non-minimum phase function

I had been asked this question in an interview for job.

This is a very interesting question from State Models for Linear Continuous-Time Systems topic in section State Variable Analysis and Design of Control Systems

Answer 1

Correct option is (d) Non-minimum phase function

The explanation is: Non-minimum phase system has zero lying on the right half but not pole and combination of the all pass and minimum phase system can be non-minimum phase system.