Practice Problem $5\mathrm{.}1$

In the MOSFET circuit shown, the transistor has

$k_n^{\text{'}}\frac{W}{L}=0\mathrm{.}2m\frac{A}{V^2},V_t=1V$

$($a$)$ Find $R$ so that the drain current is $I_D=1\mathrm{.}6mA.$

$($b$)$ Find the drain voltage $V_D$ and the drain current $I_D$ for $R=5k.$

$($a$)R=3\mathrm{.}125k$

$($b$)I_D=1\mathrm{.}1282mA{V}_{DS}=4\mathrm{.}359V$