Question

h5p2

Answer 1

Here the source labeled VDD is the power supply.

Although the source follower has no voltage gain (actually a small loss) it has power gain: it presents a very high resistance to the signal source so it takes no power from the source, but it can drive a low resistance load. Also, because of feedback, which we will learn about later, the source follower is close to linear. In this problem we will investigate the large-signal characteristics of a source follower.

As usual, the MOSFET is set up to operate in the saturated region.

Write an algebraic expression for iDS in terms of K, vIN, vOUT, and VT. Remember, algebraic expressions are case sensitive.