RE: [IBIS-Users] PullUp/PullDown toggle?

I've seen some characteristics similar to this but not to the extreme you
are showing here.  The buffers that showed this kind of behavior had
feedback in them.  What technology is this buffer? Were the other buffers
that displayed this the same technology or different?  Are these single
ended buffers or differential?

I'm surprised that this buffer passes IBIS check.  What does the
corresponding clamp curve look like?  Does it have the opposite jumps in
current?

Tom Dagostino
Teraspeed(R) Labs
13610 SW Harness Lane
Beaverton, OR 97008
503-430-1065
503-430-1285 FAX
tom@teraspeed.com
www.teraspeed.com

Teraspeed Consulting Group LLC
121 North River Drive
Narragansett, RI 02882
401-284-1827 

-----Original Message-----
From: owner-ibis-users@server.eda.org
[mailto:owner-ibis-users@server.eda.org] On Behalf Of Lars Snith
Sent: Tuesday, December 15, 2009 8:49 AM
To: Lenski, Eckhard (NSN - DE/Munich)
Cc: ibis-users@server.eda.org
Subject: Re: [IBIS-Users] PullUp/PullDown toggle?

Servus Eckhard,
Hello Timothy,

Thanks for your feedback. I'm sure I'll get my act together with this to 
help me!

Eckhard, to answer your questions:

- Only warnings are for encrypted content (models) which is normal and 
then one for a node without DC path. But it is autoconnected to the 
right node anyway, so it should not matter.

- I did not try a "slow" transient extraction, I have used only the 
testbenches provided by s2ibis3 and the other tool.

- Nope, the curves reflect this "jumpy" behaviour. But IBISCHK5 does not 
mind a bit.


Best regards,  Lars
-- 
Those who can, Do
Those who can't, Simulate

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