Hi, Lars, I would suggest you to try a larger swing for Vdc. Sometimes, in certain Vdc range, c_comp may not change significantly. Also, you can post your test case and results to the reflector or send to me. I am interested to find out. Regards, Lance Wang 978-764-2298 IO Methodology Inc. -----Original Message----- From: owner-ibis-users@server.eda.org [mailto:owner-ibis-users@server.eda.org] On Behalf Of Lars Snith Sent: Thursday, March 12, 2009 1:15 PM To: Lance Wang Cc: ibis-users@server.eda.org Subject: Re: [IBIS-Users] Ccomp extraction via Tank method Hello Lance, Yes, by varying the DC component of the AC source in alter statements: Vsw Sweep2 gnd dcoffset AC Best regards, Lars Lance Wang wrote: > Hi, Lars, > Did you change Vdc value? > > Lance Wang > 978-764-2298 > IO Methodology Inc. > > > -----Original Message----- > From: owner-ibis-users@server.eda.org > [mailto:owner-ibis-users@server.eda.org] On Behalf Of Lars Snith > Sent: Thursday, March 12, 2009 11:29 AM > To: ibis-users@server.eda.org > Subject: [IBIS-Users] Ccomp extraction via Tank method > > Hello All, > > For Ccomp extraction I have so far relied on Time Domain methods. But as > shown in the documentation (link below) the result is not always > reliable. http://www.eda.org/ibis/summits/jun02/hegazy.pdf > > I have put together a simple testbench to play around with the Tank > method, and true enough values are not especially sensible to any of > supply, temperature or even process variations. > > However, before I embark on wrapping up a new flow for myself I thought > I'd just ask this forum if there is already a recommended testbench for > the Tank method out there? If so, I'd be most interested to share. > > > Best regards, Lars -- Those who can, Do Those who can't, Simulate -- 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 majordomo@eda-stds.org |with 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 e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 -- 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 majordomo@eda-stds.org |with 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 e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993Received on Thu Mar 12 12:53:34 2009
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