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Simulators >> Circuit Simulators >> Trans analysis (SPICE2/SPICE3/SPECTRERF)
https://designers-guide.org/forum/YaBB.pl?num=1112601650

Message started by fchirouf on Apr 4^th, 2005, 1:00am

Title: Trans analysis (SPICE2/SPICE3/SPECTRERF)
Post by fchirouf on Apr 4^th, 2005, 1:00am

Hi all!
Wath is the principales difference between the standart SPICE2G6 and SPICE3 and SpectreRF when we used a standard transient analysis.?

Best regards
-Chirouf

Title: Re: Trans analysis (SPICE2/SPICE3/SPECTRERF)
Post by Geoffrey_Coram on Jul 19^th, 2005, 9:27am

There are a number of differences; you might want to read "The Designer's Guide to Spice & Spectre."

Spectre (and other commercial products) converge better because professional programmers (rather than grad students) make sure the derivatives are computed and stamped properly for Newton's method.

Ken likes to make a big deal about Spectre being the only simulator he knows of that actually verifies that Kirchoff's Current Law is satisfied at each node; Spice looks only at the change in the residual (if delta-v and delta-i are small after some number of iterations, then usually i=0, but Spice doesn't actually compute i).

-Geoffrey