IBIS Users, I wondered if anyone could clarify for me the usage of Rload vs. Rref vs. Rfixture and similarly Cref vs. Cfixture. I am using s2ibis3 and discovered that the Cref parameter specified in my .s2i file does not appear in my .ibs model file. After looking at the netlists and reading the IBIS documentation, it appears Cref is not used for any simulations. What is the purpose of Cref? And why isn't it showing up in the .ibs file? Also, I read that C_comp is taken into account for the rising/falling V-T waveforms though I cannot find that paramater in any of the corresponding netlists. How is C_comp used? As for Rref vs. Rfixture, I thought I read somewhere that for best results Rref should match Rfixture. Is that true? In my model, I am using the keywords Rising/Falling Waveform. I found that if I do not specify Rload even though I am not specifying the [Ramp] keyword, then 50ohms is used in one of the transient simulations despite Rref and Rfixture being set to 500 ohms. Should I be specifying the [Ramp] keyword along with the [Rising/Falling Waveform] keywords? If so, how do they work together? - April --------------------------------------------------- April Hachenburg Core Technology Design Engineer SMSC -------------------------------------------------------------------- |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 Wed Dec 20 09:39:53 2006
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