The phase margin of a system with the open-loop transfer function $$G\left( s \right)H\left( s \right) = \frac{{\left( {1 - s} \right)}}{{\left( {1 + s} \right)\left( {2 + s} \right)}}$$
A. $${0^ \circ }$$
B. $${63.4^ \circ }$$
C. $${90^ \circ }$$
D. $$\infty $$
Answer: Option D
This Question Belongs to Electronics And Communications Engineering >> Control Systems
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