Question

A startup company TransGadget has invented a new type of MOS-gated transistor called ExtremeT. The symbol for ExtremeT and its terminal voltage-current characteristics are given below:

iG=0
iD={0b⋅vGSif vGS<0if vGS≥0
TransGadget wants to determine the usefulness of their invention by examining the large-signal input-output characteristics of two amplifiers built using ExtremeT. They hire you to figure this out.
First a source follower amplifier is built using ExtremeT, as shown below.

What is the expression for vOUT in terms of vIN, R, and b when vIN is greater than 0V?
ExtremeT is

Answer 1

1. (R*b)/(1+R*b)*vIN
2. (VS*(1+R*b)-vIN)/(1+R*b)

Answer 2

thank you Nurali