[IBIS] Question about pull up test.

From: Kobi Pinhas <kobi.pinhas_at_.....>
Date: Mon May 18 2009 - 01:37:48 PDT
 Hi all.

Sorry to bother you. But I have a beginner's question.

I didn't find anything in the archive, maybe because it is too simple.

I want to do pull up simulation.

My Vdd is 3.3V. I understood from the cookbook that V should sweep from -Vdd
to 2Vdd relative to VDD.

So if I used the circuit below, but its not look reasonable to me, because
in this test Vout referring to ground

Swing between 0 to 3Vdd and that's mean that the lower ESD diode is not
active.

 



So I think that the pull up simulation circuit should look like this:



And the Vtable as written in the cookbook should be Vdd(should be always the
typ Vdd, am I right?) minus Vout.

 

Thanks.

Kobi.


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Received on Mon May 18 02:09:34 2009

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