Wiley signals and systems e book TLFe BO 406

16.2. Causal Stable LTI-Systems

39 1

t,

t
I

I
A

Figure 16.2: Pole-zero plots for stalile and unstable systems
16.2.3* S.

colltilluous Systems

For continuous systems we will describe Hurwitz’s stability criteria. It does not
irivolvr searching for zeros, arid directly tises t h e cocKicients of the <lc>nominat,or
~ ? o l ~ i ~ o ~i fiii the
i a l trassfcr function.
To use it we put the transfer function in the forrii

(16.15)
so that the numerator polyriomial

(16.16)