QUESTION $4$

$(5$ Marks$)$

For the common$-$gate circuit in Figure $4,$ The NMOS transistor parameters are: $VTN=0\mathrm{.}5V,KN=2m\frac{A}{V}2,V^{+}=4V$ and $V^{-}=-4V.$

$=0\mathrm{.}02V-1.R_S=8k,R_D=4k.$ The load resistor is $R_L=3k.$

e$)$ Determine IDQ and VDSQ

f$)$ Draw the AC small signal equivalent circuit.

g$)$ Find the small signal transistor parameters $g_m$ and $r_0.$

h$)$ Calculate small$-$ signal voltage gain.