Hello Arped, Thanx for your reply. In the design spec output can't switch between vinh and vinl values. And we run simulation with spice then design behave same way and give smooth transition as the device does. I am using ELDO as simulator to run the IBIS simulation it show horizontal line (other simulator show different result) between vinh and vinl values it shows mismatch between IBIS and spice behavior. Do you think the behavior of simulator is correct. In my view we will need to define IBIS behavior between vinh and vinl values otherwise each EDA vendor do it by his own algorithm and it create confusion at the application end. Regards Akhilesh -----Original Message----- From: owner-ibis@server.eda.org [mailto:owner-ibis@server.eda.org] On Behalf Of Muranyi, Arpad Sent: Thursday, January 03, 2008 9:47 PM To: ibis@server.eda-stds.org; owner-ibis-users@server.eda.org; ibis-users@server.eda.org Subject: [IBIS] RE: IBIS model behaviour between Vinh and Vinl input Akilesh, A SPICE model does what the device does (more or less). An IBIS model's Vinh and Vinl does what the input specification tells you when you look at a SPICE waveform and try to decide whether the waveform you got was good enough to consider logic high or logic low. IBIS does not describe how the device behaves between Vinh and Vinl. Arpad ================================================================= -----Original Message----- From: Akhilesh CHANDRA [mailto:akhilesh.chandra@st.com] Sent: Thursday, January 03, 2008 4:22 AM To: ibis@server.eda-stds.org; Muranyi, Arpad; owner-ibis-users@server.eda.org; ibis-users@server.eda.org Cc: 'akhilesh chandra' Subject: IBIS model behaviour between Vinh and Vinl input Hello Experts, I am using IBIS model of hysterics cell. In my model Vinh and Vinl have different values as per design specs. When I run it with one of the simulator then it show output at constant voltage(VDDE/2) between Vinh and vinl inputs, while spice show continuous behavior with same simulator so there is big mismatch between IBIS and spice result. Can anyone explain us what IBIS standard say about output behavior between Vinh and Vinl input values. Regards Akhilesh -- 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 Jan 3 21:45:50 2008
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