QUESTION $11$

For a prototype OpAmp, given $VDD=9V,-VSS=-9V,$ and given $gm2=gm6=gm7=gm8=5mS,gm9=1\mathrm{.}7mS.$

$VTN=1\mathrm{.}4V,VTP=-1\mathrm{.}0V$

$V_{GS1}=V_{GS2}=V_{GS}=V_{GS}=2\mathrm{.}3V,V_{GS}=V_{GS}=2\mathrm{.}3V,V_{SG10}=V_{SG}11=2\mathrm{.}1V$

Determine the minimum voltage for the common mode input