Hello Check if your currents in the IV table are defined correctly according to IBIS convention. Also check if your VT curve reach steady state levels. Itzik Alaa Alani wrote: >Hi Guys, > >can anyone help explain why the ibis checker is reporting these huge >differences between the I-V curves and V-t curves. I checked the transient >response of the buffer and it looks good. Is it something to do with >tolerance or range of voltage? > >Any help would be greatly appreciated. > >Thanks, >Alaa Alani > >here 's the ibis checker output: >---------------------------------------------------------------------- > >ERROR - Model driver: The [Rising Waveform] > with [R_fixture]=500 Ohms and [V_fixture]=0V > has TYP column DC endpoints of 0.00V and 0.85v, but > an equivalent load applied to the model's I-V tables yields > different voltages (-1.20V and -1.10V), > a difference of 1200.01% and 1950.00%, respectively. >ERROR - Model driver: The [Falling Waveform] > with [R_fixture]=500 Ohms and [V_fixture]=1.2V > has TYP column DC endpoints of 0.17V and 1.20v, but > an equivalent load applied to the model's I-V tables yields > different voltages (-1.20V and -1.10V), > a difference of 1370.00% and 2300.00%, respectively. >ERROR - Model driver: The [Rising Waveform] > with [R_fixture]=500 Ohms and [V_fixture_min]=0V > has MIN column DC endpoints of 0.00V and 0.66v, but > an equivalent load applied to the model's I-V tables yields > different voltages (-1.20V and -1.22V), > a difference of 6000.07% and 9400.00%, respectively. >ERROR - Model driver: The [Falling Waveform] > with [R_fixture]=500 Ohms and [V_fixture_min]=1.2V > has MIN column DC endpoints of 0.29V and 1.11v, but > an equivalent load applied to the model's I-V tables yields > different voltages (-1.20V and -1.22V), > a difference of 7450.00% and 11650.00%, respectively. >ERROR - Model driver: The [Rising Waveform] > with [R_fixture]=500 Ohms and [V_fixture_max]=0V > has MAX column DC endpoints of 0.00V and 1.01v, but > an equivalent load applied to the model's I-V tables yields > different voltages (-1.20V and -0.98V), > a difference of 545.46% and 904.55%, respectively. >ERROR - Model driver: The [Falling Waveform] > with [R_fixture]=500 Ohms and [V_fixture_max]=1.2V > has MAX column DC endpoints of 0.13V and 1.30v, but > an equivalent load applied to the model's I-V tables yields > different voltages (-1.20V and -0.98V), > a difference of 604.55% and 1036.36%, respectively.PowerVR >Imagination Technologies Ltd. > >---------------------------------------------------------------------- >****************** >This e-mail has been sent from Imagination Technologies Limited. >PowerVR, Metagence, Ensigma and PURE Digital are divisions >of Imagination Technologies Limited. > >The information contained in this e-mail, including any attachment, >is confidential and may be legally privileged. It is intended solely >for the addressee(s) and access to this e-mail by anyone else is >unauthorised. If you are not the intended recipient, any disclosure, >copying or distribution or use of the information contained in this >e-mail, is prohibited and may be unlawful. If you have received this >e-mail in error, please notify the sender by return e-mail and then >delete it from your system. > >Internet communications cannot be guaranteed to be secure, >error or virus-free. The sender does not accept liability for any errors >or omissions which arise as a result. > >Any views expressed in this message are those of the author, except >where the author specifies and, with authority, states them to be the >views of Imagination Technologies Ltd. > >------------------------------------------------------------------ >To unsubscribe from si-list: >si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field > >or to administer your membership from a web page, go to: >//www.freelists.org/webpage/si-list > >For help: >si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field > >List technical documents are available at: > http://www.si-list.org > >List archives are viewable at: > //www.freelists.org/archives/si-list >or at our remote archives: > http://groups.yahoo.com/group/si-list/messages >Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > > > > > > ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List technical documents are available at: http://www.si-list.org List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu