Siva, In a word, "yes." :) If you are generating your IBIS data from a SPICE netlist/process file (and not from lab measurement), then the waveforms under [Test Data] would indeed be generated using this original model set. The load you use for that simulation should be specified under [Test Load]. Again, please understand that [Test Load]/[Test Data] are for correlation purposes only. [Rising Waveform] et al are what are actually used by tools for simulation analysis. Does this help? - Michael Mirmak Intel Corp. Chair, EIA IBIS Open Forum -----Original Message----- From: owner-ibis-users@server.eda.org [mailto:owner-ibis-users@server.eda.org] On Behalf Of Siva Nageswara Rao Borra Sent: Friday, September 15, 2006 05:02 To: ibis-users@server.eda.org Cc: Siva Nageswara Rao Borra; Mirmak, Michael; Siva Borra; deepti@india.nsc.com Subject: Re: [IBIS-Users] How to obtain Golden waveforms of ver 4.x? Hi Michael, "These are waveforms generated using the original circuit design on which the IBIS data is based. " >> Is this mean that the Spice netlist from which the IBIS models are drived? Is it possible to obtain the golden waveforms from a spice netlist by simply, simulating the output VT curves using the ideal test load specified by [test load] and [test data] network? In other words simply replacing the network of v_fixture, r_fixture, and c_fixture (which is used for rising and falling waveforms?) with [test load] network? Clarification will be of great help. Regards, Siva Borra. Siva Nageswara Rao Borra wrote: > Michael, > The rising and falling waveforms are drawn considering the parameters, > L_dut, R_dut, C_dut, > when applied the load with L_fixture, R_fixture, C_fixture. > Where as the Golden waveforms are obtained at two different points > with [test load] and [test data] > conditions are applied. > My doubt is how will we get the [test load]/[test data] parameters? > Are there any default values for these? > Can you tell me how can we obtain the golden waveforms from spectre > for the buffer example shown in open source s2ibis3 > download from http://www.ece.ncsu.edu/erl/ibis/s2ibis3/s2ibis3.htm? > s2ibis3/example/ex1/buffer.ibs. > > Regards, > Siva Borra. > > > Mirmak, Michael wrote: > >> Siva, >> >> The "golden waveforms" are mentioned in the context of the [Test Data] >> and [Test Load] keywords. These are waveforms generated using the >> original circuit design on which the IBIS data is based. [Test Data] >> can be included in an IBIS file to give recipients an idea of how well >> the IBIS data, particularly after interpretation by an EDA SI tool, >> matches the original circuit design's output for a given load condition. >> >> >> For example, one could verify both the usage of the [Driver Schedule] >> keyword in a particular tool and the data behind it by comparing it to >> [Test Data] generated for the same test load and environmental >> conditions. If the [Test Data] and tool output match, then the tool is >> implementing the proper combination of the [Driver Schedule] sections >> for that buffer design, test conditions and data pattern. >> >> - Michael Mirmak >> Intel Corp. >> Chair, EIA IBIS Open Forum >> >> >> -----Original Message----- >> From: owner-ibis-users@server.eda.org >> [mailto:owner-ibis-users@server.eda.org] On Behalf Of Siva Nageswara Rao >> Borra >> Sent: Tuesday, September 05, 2006 00:18 >> To: ibis-users@server.eda.org >> Cc: Siva Nageswara Rao Borra; deepti@india.nsc.com >> Subject: [IBIS-Users] How to obtain Golden waveforms of ver 4.x? >> >> Hi Expert, >> I need help regarding how to obtain the Golden waveforms mentioned in >> the >> IBIS version 4.x ? And where they are useful? >> Thanks in Advance for your help. >> With best regards, >> Siva Borra. >> >> >> >> >> -------------------------------------------------------------------- >> |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 >> >> -------------------------------------------------------------------- >> |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 >> >> >> >> > > > -------------------------------------------------------------------- |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 -------------------------------------------------------------------- |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 Fri Sep 15 09:58:18 2006
This archive was generated by hypermail 2.1.8 : Fri Sep 15 2006 - 10:00:25 PDT