[SI-LIST] Re: using spice to calculate driver output impedance

Have you tried the slope of the pullup and pulldown curves in the transition
region? Z=dV/dI



-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of eric steimle
Sent: Tuesday, February 22, 2005 7:11 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] using spice to calculate driver output impedance


Hi all, I'm having some trouble thinking of the right
way to calculate driver impedance using spice.  I have
finally a functioning model of the driver in question
and I've been able to run some simulations with it.  I
was hoping that there might be an accepted way of
calculating driver impedance out there that I don't
know about, or perhaps some literature you could point
me to.  Any help would be greatly appreciated.

Best Regards,
Eric



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