Q$-3-(25$ Points$)$

Consider the circuit shown below. Use the following parameters for your calculations.

$V_{DD}=-V_{SS}=5V,$

$K_n=0,7m\frac{A}{V^2},$

$V_{TN}=0,8V$

$=0,$

$v_O,R_1=237k,$

$R_2=63k,$

$R_D=3k,$

$R_s=1k,$

a$-$Please draw AC equivalent circuit and small signal equivalent circuit. $(6$ points$)$

b$-$Find $V_{GS}(6$ points$)$

c$-$Find operating point Current loa and Voltage VDSa $(8$ points$)$

d$-$Find $A_v$ Voltage Gain $(5$ points$)$