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

Unger Bernhard (Bernhard.Unger@erlm.siemens.de)
Fri, 17 Apr 1998 12:03:49 +-200

Yehuda,

here you find a HSPICE deck for evaluating capacitances from input impedance simulations.

MOS capacitance
.OPTIONS post

.PARAM vgate=0.0

.PROBE AC ZIN(M) ZIN(R) ZIN(I) ZIN(P)

.PROBE AC Cgate=PAR('1/(2*3.142*HERTZ*abs(ZIN(I)))')

Vgate gate 0 DC=vgate AC 1m

.AC DEC 300 1MEG 500MEG SWEEP DATA=V_term $ or other frequency range

.DATA V_term vgate
+ 0.0 1 2 $ voltage across terminals
.ENDDATA

.NET Vgate

M1 0 gate 0 0 mname L=xx W=xx

.END

Bernhard Unger

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----------
Von: Yehuda D. Yizraeli[SMTP:yehuda@zoran.co.il]
Gesendet: Donnerstag, 16. April 1998 13:27
An: Signal Integrity Mailing List
Betreff: [SI-LIST] : How to measure MOS capacitance

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..?

thanks in advance, yehuda

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