From basic electrostatic considerations derive the output and transfer equations for field-effect transistor. Include in the derivation the short channel case.
current vs drain-source voltage at constant gate-source voltage, for the output;
current vs gate-source voltage at constant drain-source voltage, for the transfer
current vs drain-source voltage at constant gate-source voltage, for the output;
current vs gate-source voltage at constant drain-source voltage, for the transfer