Re: [SI-LIST] : Problems converting ibis to signoise (specctraquest)

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From: Mike LaBonte (mikelabonte@cadence.com)
Date: Mon Aug 28 2000 - 11:55:08 PDT


Muhammad,

Since ECL circuits require a pulldown resistor, the fixture for testing
an ECL driver must have a resistor and a voltage source. It sounds like
your ECL [Model] has Rref but not Vref. Add Vref into the IBIS file, or
remove the Rref if there is no need to calculate standard buffer delays.

Mike LaBonte
Cadence Design Systems

> "Muhammad S. Sagarwala" wrote:
>
> Hello Friends,
>
> I am having problems converting ibis file to signoise
> (specctraquest). I am getting the following warning and error:
> ------------------------------------
> WARNING @line 125: IOCell <ECL_el52_output> is ECL: so it should
> contain a ThermalShift section;
> ERROR @line 125: Delay measurement fixture must contain V for ECL
> technology
> ------------------------------------------
>
> Does anybody know why is specctraquest doing it?? I have checked the
> ibis file and run it through the parser without any problems.
>
> cheers,
>
>
>
>
>
>
>

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