[SI-LIST] Re: Can I get this from an IBIS model?
- From: "Scott McMorrow" <scott@xxxxxxxxxxxxx>
- To: doug@xxxxxxxxxx, "silist" <si-list@xxxxxxxxxxxxx>
- Date: Fri, 27 Sep 2002 22:11:58 -0700
Doug,
go to the I/V curves and at 1 Volt compute the output resistance. The
behavior here is fairly indicative of the impedance across most of the
output range.
Z = E/I
At 1 volt in the table, the impedance is the inverse of the current.
From this you can build a table of the range of impedance of the device
from min to max, rising and falling edge.
best regards,
scott
--
Scott McMorrow
Teraspeed Consulting Group LLC
2926 SE Yamhill St.
Portland, OR 97214
(503) 239-5536
http://www.teraspeed.com
Doug Brooks wrote:
>Suppose I have an IBIS model, but not the physical part. Is there a way I
>can determine the output impedance of the device (and if different, the
>output impedance for each digital state) from the IBIS model itself?
>
>I know I can build a simulation and solve for the output impedance that
>way, but can I get it from the IBIS model itself without going through the
>simulation step? . And if so, where in a model do I look?
>
>Thanks for any help.
>
>Doug Brooks
>
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