A Refresher on Poles and Zeros An example transfer function is given in Equation 3: Dissecting Equation 3, we first see the term ωp0 /s, which is referred to as an origin pole.

A pole of a transfer function is avalue of s that makes the denominatorequal to zero, and a zero of atransfer function is a value of s thatmakes the numerator equal to zero.Systems that have no poles ...