Hi, Vivek, Two items: 1) The V-t curves should have "zero slope" at both ends. 2) There I-V tables need a small enough step size so the linear interpolation is accurate where the load line crosses. Either (or both) of those could cause the parser report that you are seeing. Drawing a load line on the I-V table can help identify the problem. Another thought: Is 100 Ohms the usual transmission line impedance for designs using this device? Is this same resistance used for the [Ramp] section? Best regards, Lynne "IBIS training when you need it, where you need it." Dr. Lynne Green Green Streak Programs http://www.greenstreakprograms.com 425-788-0412 lgreen22@mindspring.com -----Original Message----- From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of Vivek Kumar Sundriyal Sent: Friday, May 20, 2005 3:22 AM To: ibis-users@eda.org; owner-ibis-users@eda.org 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 |------------------------------------------------------------------ |For help or to subscribe/unsubscribe, email majordomo@eda.org with just |the appropriate command message(s) in the body: | | help | subscribe ibis <optional e-mail address, if different> | subscribe ibis-users <optional e-mail address, if different> | unsubscribe ibis <optional e-mail address, if different> | unsubscribe ibis-users <optional e-mail address, if different> | |or email a written request to ibis-request@eda.org. | |IBIS reflector archives exist under: | | http://www.eda.org/pub/ibis/email_archive/ Recent | http://www.eda.org/pub/ibis/users_archive/ Recent | http://www.eda.org/pub/ibis/email/ E-mail since 1993 |------------------------------------------------------------------ |For help or to subscribe/unsubscribe, email majordomo@eda.org |with just the appropriate command message(s) in the body: | | help | subscribe ibis <optional e-mail address, if different> | subscribe ibis-users <optional e-mail address, if different> | unsubscribe ibis <optional e-mail address, if different> | unsubscribe ibis-users <optional e-mail address, if different> | |or email a written request to ibis-request@eda.org. | |IBIS reflector archives exist under: | | http://www.eda.org/pub/ibis/email_archive/ Recent | http://www.eda.org/pub/ibis/users_archive/ Recent | http://www.eda.org/pub/ibis/email/ E-mail since 1993Received on Fri May 20 10:51:44 2005
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