15 views

Consider the following block diagram in the figure.

The transfer function $\frac{C(s)}{R(s)}$ is

1. $\frac{G_{1}G_{2}}{1+G_{1}G_{2}}$
2. $G_{1}G_{2}+G_{1}+1$
3. $G_{1}G_{2}+G_{2}+1$
4. $\frac{G_{1}}{1+G_{1}G_{2}}$

edited | 15 views