Date: Fri May 09 2014 - 06:55:30 PDT
Hi I want to brief on the R_load I am using I am creating IBIS model (Version 3.2) of a full differential buffer . I have also connected the termination shown in "diffbuff_termination.png" in differential buffer schematic. Even though I have connected the required termination in schematic itself , the .s2i file need R_load value to be supplied. Therefore I have used a High value resistor (R_load=100G ohm) in .s2i file. Hyperlinx "Check file for IBIS spec conformance" gives following error ... ERROR: Model OUTPUT_DIF: The [Rising Waveform] with [R_fixture]=1e+011 Ohms and [V_fixture_max]=0.22V has MAX column DC endpoints of 0.08V and 0.31v, but an equivalent load applied to the model's I-V tables yields different voltages ( 0.08V and 0.35V), a difference of 0.01% and 16.09%, respectively. What could be wrong? What can I do to get rid of these errors and warnings? Please mail me if any more clarification required ,Waiting for your replies. Thanks and regards Saravanan.G From: Saravanan Ganesh Sent: Thursday, May 08, 2014 8:04 PM To: 'ibis-users@eda.org' Subject: full differential buffer IBIS modeling Hi I am creating IBIS model (Version 3.2) of a full differential buffer . I have also connected the termination shown in "diffbuff_termination.png" in differential buffer schematic. Therefore I took R_load = 100G ohm in .s2i file, so that only load in schematic are effective. Hyperlinx "Check file for IBIS spec conformance" gives following error ... ERROR: Model OUTPUT_DIF: The [Rising Waveform] with [R_fixture]=1e+011 Ohms and [V_fixture_max]=0.22V has MAX column DC endpoints of 0.08V and 0.31v, but an equivalent load applied to the model's I-V tables yields different voltages ( 0.08V and 0.35V), a difference of 0.01% and 16.09%, respectively. What could be wrong? What can I do to get rid of these errors and warnings? Thanks and regards Saravanan.G -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail mikelabonte@eda-stds.org |or ibis-request@eda-stds.org | |IBIS reflector archives exist under: | | http://www.eda-stds.org/ibis/email_archive/ Recent | http://www.eda-stds.org/ibis/users_archive/ Recent | http://www.eda-stds.org/ibis/email/ E-mail since 1993
