Hi Jennifer, You have one more option! ADS is Cadence spectre-netlist compatible. You can directly use your existing spectre-netlist and simulate it with ADS-transient simulator through "dynamic-link". This way, you can take advantage of ADS-transient simulator with causality/passivity enforcement while using your existing spectre netlists. Regards, Amolak S. Badesha Application Expert Agilent EEsof EDA 408-553-2606 -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of Jennifer Maharani Sent: Monday, May 18, 2009 4:30 AM To: WARWICK,COLIN (A-Americas,ex1) Cc: <si-list@xxxxxxxxxxxxx> Subject: [SI-LIST] Re: Causality Hi Colin, I run my transient simulation in Cadence environment. I have too many things to transfer to different environment, not to mention all the transistor level models that I am using. The solution would be to generate a model that I can use in my Cadence env. Please correct me if I am wrong, so the only solution that Agilent has to offer under this circumstances is the broadband spice generator. Many thanks. On May 16, 2009, at 2:09 AM, <colin_warwick@xxxxxxxxxxx> wrote: > Hi Jennifer, > I'm wondering if you'd tried ADS Transient Convolution simulator? > Our Broadband SPICE Model Generator uses a rational function approach: > > B. Gustavsen and A. Semlyen, "Rational approximation of frequency > domain responses by vector fitting," IEEE Trans. Power Delivery, > Vol. 14, No. 3, pp. 1052-1061, July 1999. > > > ...which can yield an excellent model in certain circumstance. > However, ADS Transient Convolution has a more general approach: > > http://cp.literature.agilent.com/litweb/pdf/5990-3571EN.pdf > > I was wondering if you'd had the opportunity to evaluate it? > > Best regards, > > -- Colin > > > > -----Original Message----- > From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx > ] On Behalf Of Jennifer Maharani > Sent: Thursday, May 14, 2009 5:02 PM > To: si-list@xxxxxxxxxxxxx > Subject: [SI-LIST] Re: Causality > > Many thanks Gary. I have used the broadband spice generator from > Agilent. It does not fix the causality problem. > > On May 14, 2009, at 10:52 PM, "Gary Otonari" <garyo@xxxxxxxxxxxx> > wrote: > >> Jennifer -- Do you have ADS? It might help you. Here is some >> material on >> recent advances in their transient simulator. The 1st link is for a >> paper >> we (GigaTest) did for the SI Seminar Series last year. The 2nd is a >> webinar >> on the same topic ( I think delivered by Sanjeev Gupta of Agilent). >> Good >> luck. >> >> -- Gary Otonari >> >> http://www.home.agilent.com/upload/cmc_upload/All/Meas_Based_Transient_Simul >> ation_Gigatest.pdf >> >> http://www.home.agilent.com/agilent/editorial.jspx?cc=US&lc=eng&ckey=1454262 >> &nid=-34511.0.00&id=1454262 >> >> >> >> -----Original Message----- >> From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx >> ] On >> Behalf Of Jennifer Maharani >> Sent: Thursday, May 14, 2009 12:49 PM >> To: si-list@xxxxxxxxxxxxx >> Subject: [SI-LIST] Causality >> >> Dear all, >> >> I have non-passive non-causal S-parameter. I can use some commercial >> tools that can generate broadband spice with passivity enforcement. >> Not with causality enforcement, though. >> >> In transient simulation it clearly shows non-causal response. >> >> Does anybody know how to resolve this issue? Quick and dirty solution >> will also be appreciated. >> >> Many thanks. > ------------------------------------------------------------------ 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.net 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.net 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