Shivani, It is not unusual to see “no” current between the P and N pins of a differential buffer. It all depends on how the internal circuit of the buffer is designed. Thanks, Arpad ========================================================== From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of Shivani Sharma Sent: Wednesday, October 15, 2014 12:19 PM To: ibis-users@eda.org Subject: [IBIS-Users] Fwd: FW: ddr103_v.scs true differential buffer IBIS modelling Hi all I am trying to model true differential buffer following the “Series model approach” at http://www.vhdl.org/ibis/summits/oct03/muranyi.pdf. ). I am assuming that a differential buffer should have some sort of differential current that would flow from PADP to PADN when the two nodes are at different voltages. I am trying to sweep PADP and PADN voltages to see current between the two PADS. However. the currents I see are in nano-Amps indicating that there is almost no differential current. Current into PADN is almost independent of DC-voltage forced on PADP. Is this an expected behavior or am I missing something in this activity? DC sweep is applied on padn and padp is kept at different voltages (-1.2 to 2.4 in steps of 0.4V) . Regards Shivani Detailed snapshots shown here https://www.blogger.com/blogger.g?blogID=1357760498839013626#editor/target=post;postID=2986411014708903686;onPublishedMenu=posts;onClosedMenu=posts;postNum=0;src=postname -- This message has been scanned for viruses and dangerous content by MailScanner<http://www.mailscanner.info/>, and is believed to be clean. -- 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 1993Received on Wed Oct 15 10:33:22 2014
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