$(25$ points$)$ MOSFET Amplifier. A certain n $-$type MOSFET has a $\backslash$mu $\_($n$)$C$\_($ox$)($W$)/($L$)=10$m$($A$)/($V$^(2))$

and an r$\_($o$)=1\mathrm{.}5$k$\backslash$Omega $.$V$\_($t$)=1\mathrm{.}0$V$.$

a$.$ Using at least two of these MOSFETs, design a two$-$stage amplifier that gives a midband

voltage gain of $-15\mathrm{.}0+-0\mathrm{.}1$ to a $20$ ohm resistive load. Let VDD$=12$V$.$ Use current

sources for biasing. Assume that the signal source has a $3$k$\backslash$Omega source impedance.

b$.$ Draw a circuit diagram of your design, labeling all components except capacitances.