Chris:
I think your assumptions are good. Holding the endpoints to within 2% of the
difference between seems accurate enough for most cases. The check may
fail with very heavily loaded devices. However, we cannot be perfect for
all cases. Will the percentage be adjustable?
Bob Ross
Interconnectix, Inc.
> I think we need to define a % voltage that the first/last entries must
> lie within (e.g. 2.0%).
> Percent of what, though? Well, how about percent of 0% to 100% of the
> waveform endpoint voltages difference itself. This would require a
> highly loaded waveform to settle to a more absolute voltage since it
> would have a smaller voltage swing. Is this a good thing?
> Also, this is easy to implement!! :)
> Example Waveform:
> Begins: (0ns, 0.0V)
> Ends: (9ns, 4.0V)
> Load: 50 Ohms, 0.0V
>
> For 2% agreement, the v_tolerance = 2% * (4.0 - 0) = .08V
> So model passes if...
> -0.08 < v_dc_low_for_load < 0.08
> AND
> 3.92 < v_dc_high_for_load < 4.28
> Is this reasonable?
> -Chris R.
Received on Wed Oct 30 16:16:08 1996
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