Hi all, I have some doubts regarding the usage of IBIS models. In the IBIS model, 1. Ramp measurement is done with a default value of 50ohms (R_load) connected to vref. 2. Rising/Falling waveforms can be simulated/measured with R_/L_/C_fixture/V_fixture. 3. Cref and Rref are used for specifying the way delay was measured by the manufacturer. With the above information incorporated in the IBIS file, if used for simulating the interface will it be correctly representing the I/O? For e.g. with R_/L_/C_fixture/V_fixture/R_load effects included in the waveform data, if I make some external terminations, it is in addition to the R_fixture/R_load and may not correctly represent the system. Instead, why don't we have just the un-loaded I/O buffer modeled in the IBIS, so that the designer who is using IBIS can put appropriate interface and do the simulations. Regards, Canes Send free SMS to your Friends on Mobile from your Yahoo! Messenger. Download Now! http://messenger.yahoo.com/download.php -- 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 Sun Oct 19 22:43:39 2008
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