Hello Friends, I am working on one of my IO design. When I put a transmission line with Z0=70ohm and length is 2inch with 5pf load my rise and fall time is just 50nsec. When I use R_fixture =70ohm in my design then transition time increase to 300nsec. This cause a lot of spice and IBIS mismatch in my final models. Could you please give me an idea that how we can select a good R_fixture value. If you have any doc that help me to understand how we can select R_fixture and it's effect in final simulation. Customer spec say that this cell is work fine till 10pf load. I don't have any R_fixture and V_fixture information from customer. Regards Akhilesh ----------------------------------------------------------------- |For help or to subscribe/unsubscribe, email majordomo@eda.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 email a request to ibis-request@eda.org. | |IBIS reflector archives exist under: | | http://www.eda.org/pub/ibis/email_archive/ Recent | http://www.eda.org/pub/ibis/users_archive/ Recent | http://www.eda.org/pub/ibis/email/ E-mail since 1993Received on Sat Apr 23 09:09:16 2005
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