Name:

$2.$ Derive Common$-$Mode Rejection Ratio $($CMRR$)$ from the given circuits:

a$)$ Ignore Lambda effects. $M1=M2.(A_{DM}$:$6pts,A_{CM-DM}$:$6pts)$

b$)$ Assume ${}_1,{}_2=0,{}_3,{}_{4}0.M1=M2$ and $M3=M4.(($:$A_{DM}$:$6pts,A_{CM-DM}$:$6pts\}$ Vn