Re: [IBIS-Users] problem with the rising and falling waveforms

Hi vivek,
This problem occurs because the simulation time provided is less for the
buffer model generation
You got this error
ERROR - Model K3B07LG24Q7_QQ60: The [Rising Waveform]
      with [R_fixture]=100 Ohms and [V_fixture_max]=0V
      has MAX column DC endpoints of  0.00V and  3.46v, but
      an equivalent load applied to the model's I-V tables yields
      different voltages ( 0.00V and  4.23V),
      a difference of  0.03% and 18.33%, respectively.

Now check the The [Falling Waveform]
      with [R_fixture]=100 Ohms and [V_fixture_max]=0V for the MAX column
you will find the end point to be 4.23V.

Now for model syntax checker mismatch is there because the rising and
falling should be continuous for the whole wave.This happens because
transient analysis for the rising waveform could not attain the value to
make the curve continuous .

So to solve the problem increase the simulation time

Hope this solves your problem.

Best Regards
Arnab Hazarika




----- Original Message ----- 
From: "Vivek Kumar Sundriyal" <Vivek.Kumar.Sundriyal@nsc.com>
To: <ibis-users@eda.org>; <owner-ibis-users@eda.org>
Sent: Friday, May 20, 2005 3:21 AM
Subject: [IBIS-Users] problem with the rising and falling waveforms


>
> Hi  ,
>
> On running the IBISCHK4 on a generated IBIS model, I get the following
error :
>
> ERROR - Model K3B07LG24Q7_QQ60: The [Rising Waveform]
>       with [R_fixture]=100 Ohms and [V_fixture_max]=0V
>       has MAX column DC endpoints of  0.00V and  3.46v, but
>       an equivalent load applied to the model's I-V tables yields
>       different voltages ( 0.00V and  4.23V),
>       a difference of  0.03% and 18.33%, respectively.
> ERROR - Model K3B07LG24Q7_QQ60: The [Rising Waveform]
>       with [R_fixture]=100 Ohms and [V_fixture_max]=3.6V
>       has MAX column DC endpoints of  0.11V and  3.60v, but
>       an equivalent load applied to the model's I-V tables yields
>       different voltages ( 0.11V and  4.40V),
>       a difference of  0.04% and 18.69%, respectively.
>
>
> Can anyone guide me on the cause of this error ? And how can I get over
with it
> ?
>
> Thanks ,
>
> Vivek
>
>
>
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