Re: [SI-LIST] : How to measure MOS capacitance

D. C. Sessions ([email protected])
Thu, 16 Apr 1998 07:28:57 -0700

Yehuda D. Yizraeli wrote:
> Hi,
> How can i measure, in HSPICE, the capacitance of a mos transistor,
> connected as a capacitor, as a function of the voltage across its terminals..?

The easiest is to do an AC small-signal sweep with bias voltage as secondary sweep.

M1 vss gate vss vss NCH L=xxx W=www
Vac gate vbg AC 1m
Vbias vbg vss DC bias
.AC dec 20 fstart fstop
+SWEEP bias 0 3 50m

... and observe the current in Vac.

D. C. Sessions
[email protected]