RE: [IBIS-Users] rising waveform

I don't think this is the case in this model.  The rising edge is the
problem area.  The end of the rise makes it to the power supply voltage of
3.10 Volts.  Increasing the simulation time will only get you more of the
output at 3.10 Volts.  The issue is the starting voltage being higher than
the IV curves predict.

Tom Dagostino
Teraspeed(R) Labs
13610 SW Harness Lane
Beaverton, OR 97008
503-430-1065
tom@teraspeed.com
www.teraspeed.com

Teraspeed Consulting Group LLC
121 North River Drive
Narragansett, RI 02882
401-284-1827

-----Original Message-----
From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org]On
Behalf Of Vivek Kumar Sundriyal
Sent: Thursday, July 07, 2005 8:24 PM
To: lau yy
Cc: ibis-users@eda.org; owner-ibis-users@eda.org
Subject: Re: [IBIS-Users] rising waveform


Lau ,

I also had a similar problem sometime back. And the way to resolve is to
increase the simulation time.
In your case, a small increase in sim time should do the job.

Cheers ,

Vivek







                      "lau yy"
                      <tok47@hotmail.co        To:       ibis-users@eda.org
                      m>                       cc:
                      Sent by:                 Subject:  [IBIS-Users] rising
waveform
                      owner-ibis-users@
                      eda.org


                      07/08/05 05:21 AM






Dear ALL,

Can someone show me my mistake? The warning message like below.

WARNING - Model DQ0: The [Rising Waveform]
      with [R_fixture]=70 Ohms and [V_fixture_max]=3.1V
      has MAX column DC endpoints of  1.74V and  3.10v, but
      an equivalent load applied to the model's I-V tables yields
      different voltages ( 1.71V and  3.10V),
      a difference of  1.94% and  0.01%, respectively.
Thanks alot.



rdgs
yylau
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