D MOSFET Bias

The simplest way to bias a D MOSFET is to use the zero bias network of Figure 134. This is reasonable since v_GS can be positive and negative.

**Figure 134:** n-channel D FET bias.
$\begin{figure} \begin{center} \epsfig{file=images/fetimg17.eps}\end{center}\end{figure}$

We have

V_GS = 0

(125)

and so I_D = I_DSS, and

V_DS = V_DD-I_D R_D

(126)

ANU Engineering - ENGN2211