$3$

Given the following Ct$.$

$(4)$

$K=20m\frac{A}{V^2},V_{T_4}=2\mathrm{.}0V,i_D=20mA$ at $Q-$point

she $C\text{'}$s am large, $R_3=200$

a$)$ Find $R_5$ and $R_D$

b$)D_f{R}_1+R_2=120R_2,$ Find $R_1$&$R_2$

c$)$ Draw the the small$-$signal equivalem circuit and find Im

a$)$ Fina $V_{a_s}$