The transfer function for a P-D controller is

A. $${{\text{K}}_{\text{c}}}\left( {1 + {\tau _{\text{D}}}{\text{s}}} \right)$$

B. $${{\text{K}}_{\text{c}}}\left( {1 + \frac{1}{{{\tau _{\text{D}}}{\text{s}}}}} \right)$$

C. $${{\text{K}}_{\text{c}}}{\tau _{\text{D}}}{\text{s}}$$

D. $$\frac{{{{\text{K}}_{\text{c}}}}}{{{\tau _{\text{D}}}{\text{s}}}}$$

Answer: Option A