An amplifier is constructed with the NewFET as shown in Figure3.
For the NewFET biased into the the active region, 0 < VT =< vIN =< VS, how to derive the expression of vOUT as a function of vIN in terms of the power supply voltageVS, the resistance R, and the NewFET parameters, K and VT?

 

I am curious about what is a NewFET?
But since you posted a Word Document instead of a schematic on a PNG file type then I will not look.