[SI-LIST] Re: FW: [IBIS-Users] Using IBIS models for VDDdroop & Ground Bounce

Follow Up Questions.

This is about the presentation koller.pdf mentioned in this email.
 From the figures this is what I believe they are.  They look so similar 
to curves found in CMOS design books.  Based on that,

On Page 7, bottom figure..

1. Blue curves are Ids/Vds curves for the pull-down device (NMOS) for 
three seperate gate voltage settings.(These are NOT min-max-typ curves)
2.  Red curves are Ids/Vds curves for pull-up device (PMOS) for three 
seperate gate voltage(but same as 1.) settings.
3. The points of intersection are the values of cross-bar current. Thus 
first point of intersection has blue curve(NMOS) in saturation and red 
curve(PMOS) in linear which makes sense.

Now, my questions are  a. Am I correct?  b. If I am, then how does one 
obtain the 3 curves from IBIS models?

Could someone please shed some light on this?

Thank you.

Abhijit.




> 
>>ftp://ftp.eda.org/pub/ibis/summits/mar02/koller.pdf
>>
>>Just to point you to this presentation, since it may be of interest to
> 
> you. I have never looked at cross-bar currents myself as I mostly deal with
> differential buffers.
> 
>>Best Regards,
>>
>>Herbert.
>>
>>


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