Re: [IBIS-Users] Complementary Differential Input Buffer modeling help

Eric,

I had attempted this sometime back. Details here:
http://www.vhdl.org/pub/ibis/summits/oct03/muranyi.pdf

1) Search for series mosfet in this doc:
http://eda.org/pub/ibis/ver5.0/ver5_0.txt

2) Since this is a receiver, pullup/pulldown tables are perhaps not required.
The common mode current should go to clamp tables and the differential currents
should go to the series model.

I hope this helps...

- Gowtham

> Hello,
>
> I am trying to model a complementary differential input buffer (full
> differential as defined in the ibis spec), and the IBIS cookbook suggests I use
> the Series Mosfet keyword (I guess the device doesn't actually have to be a mos
> to use this keyword) since my 3D plots contain non-linearity's.
>
> The problems I am having are:
>
> 1) I am not quite sure how to format the IBIS file to use this (the example
> isn't very clear).
>
> 2) With my Vpos vs. Vneg vs. i curves, do I still need to remove the common
> mode and place them in the pullup/down tables when I use Series mosfet, or is
> that only for when you use Series R.
>
> Also, if anyone has a model of this type that can be disclosed, it would be
> greatly appreciated.
>
> Best Regards,
> Eric
>
>
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