Arpad, What is a true differential buffer?if there is no dc current between p and n , shouldn't it be psuedo differential buffer? since there is just cseries between p and n Thanks Shivani On 10/15/14, Muranyi, Arpad <Arpad_Muranyi@mentor.com> wrote: > 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. > > -- 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 Thu Oct 16 20:36:54 2014
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