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:[email protected]]
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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