I downloaded geda-examples-1.4.3.tar.gz, containing the RF_Amp example. I built ngspice 19 from sources without error.
I get a max data size warning on any simulation, but, see no strange actions when simulating other circuits. I tried a dozen emitter followers with different models and the results were about what I expected. I wanted to use gEDA to generate models using hierarchy. The RF_Amp example is exactly what I want to do. I get a 'singular matrix' error when doing an op in ngspice 19 with the MSA-2643.cir file from the tarball. I think I missed something. tomdean # ngspice MSA-2643.cir Warning -approaching max data size: current size=5.488 kB, limit=0 bytes Warning -approaching max data size: current size=5.488 kB, limit=0 bytes Warning -approaching max data size: current size=5.488 kB, limit=0 bytes Warning -approaching max data size: current size=5.488 kB, limit=0 bytes Warning -approaching max data size: current size=5.488 kB, limit=0 bytes ****** ** ngspice-19 : Circuit level simulation program ** The U. C. Berkeley CAD Group ** Copyright 1985-1994, Regents of the University of California. ** Please submit bug-reports to: [email protected] ** Creation Date: Wed Aug 5 23:06:18 PDT 2009 ****** Circuit: * gnetlist -v -g spice-sdb -o msa-2643.cir msa-2643.sch Warning -- Level not specified on line "(bf=1e6 ikf=5.895e-1 ise=2.838e-19 ne=1.006 vaf=44 nf=1 tf=5.37e-12 xtf=20 vtf=0.8 itf=8.872e-1 ptf=22 xtb=0.7 br=1 ikr=4.4e-2 nc=2 var=3.37 nr=1.005 tr=4e-9 eg=1.17 is=1.79e-17 xti=3 tnom=21 cjc=3.717e-14 vjc=0.6775 mjc=0.3319 xcjc=4.398e-1 fc=0.8 cje=3.217e-13 vje=0.9907 mje=0.5063 rb=2.325 irb=3.272e-4 rbm=2.5e-2 kf=1.026e-24)" Using level 1. Warning -- Level not specified on line "(bf=1e6 ikf=5.895e-1 ise=2.838e-19 ne=1.006 vaf=44 nf=1 tf=5.37e-12 xtf=20 vtf=0.8 itf=2.218e-1 ptf=22 xtb=0.7 br=1 ikr=1.1e-2 nc=2 var=3.37 nr=1.005 tr=4e-9 eg=1.17 is=4.475e-18 xti=3 tnom=21 cjc=2.921e-14 vjc=0.6775 mjc=0.3319 xcjc=4.398e-1 fc=0.8 cje=7.546e-14 vje=0.9907 mje=0.5063 rb=9.301 irb=8.18e-5 rbm=0.1 kf=1.643e-23)" Using level 1. ngspice 7 -> op Doing analysis at TEMP = 27.000000 and TNOM = 27.000000 Warning: singular matrix: check nodes l6#branch and l6#branch Note: starting dynamic Gmin stepping Trying gmin = 1.0000E-03 Note: One successful Gmin step Trying gmin = 1.0000E-04 Note: One successful Gmin step Trying gmin = 1.0000E-05 Note: One successful Gmin step Trying gmin = 1.0000E-06 Note: One successful Gmin step Trying gmin = 1.0000E-07 Note: One successful Gmin step Trying gmin = 1.0000E-08 Note: One successful Gmin step Trying gmin = 1.0000E-09 Note: One successful Gmin step Trying gmin = 1.0000E-10 Note: One successful Gmin step Trying gmin = 1.0000E-11 Note: One successful Gmin step Trying gmin = 1.0000E-12 Note: One successful Gmin step Trying gmin = 1.0000E-12 Note: One successful Gmin step Warning: singular matrix: check nodes l6#branch and l6#branch Warning: Dynamic Gmin stepping failed Note: starting source stepping Supplies reduced to 0.0000% Warning: singular matrix: check nodes l6#branch and l6#branch Trying gmin = 1.0000E-02 Note: One successful Gmin step Trying gmin = 1.0000E-03 Note: One successful Gmin step Trying gmin = 1.0000E-04 Note: One successful Gmin step Trying gmin = 1.0000E-05 Note: One successful Gmin step Trying gmin = 1.0000E-06 Note: One successful Gmin step Trying gmin = 1.0000E-07 Note: One successful Gmin step Trying gmin = 1.0000E-08 Note: One successful Gmin step Trying gmin = 1.0000E-09 Note: One successful Gmin step Trying gmin = 1.0000E-10 Note: One successful Gmin step Trying gmin = 1.0000E-11 Note: One successful Gmin step Trying gmin = 1.0000E-12 Note: One successful Gmin step Note: One successful source step Supplies reduced to 0.1000% Warning: singular matrix: check nodes l6#branch and l6#branch Supplies reduced to 0.0000% Warning: singular matrix: check nodes l6#branch and l6#branch Warning: source stepping failed DC solution failed - Last Node Voltages ------------------ Node Last Voltage Previous Iter ---- ------------ ------------- 3 6.24812e-163 0 7 6.37435e-149 0 vout 0 0 6 0 0 5 2.68975e-149 0 9 5.60813e-148 0 4 -1.87602e-147 -1.05937e-161 2 5.60813e-148 3.39352e-162 x2.3 -1.87665e-147 -1.90218e-169 x2.1 3.61287e-149 1.40025e-161 x2.2 6.37647e-149 1.24316e-163 1 6.37435e-149 0 x1.3 5.62427e-148 4.8814e-170 x1.1 -1.88928e-147 -5.40585e-162 x1.2 6.44761e-149 8.83662e-163 vin 0 0 8 6.37435e-149 0 vsource 0 0 l6#branch -7.7552e-151 0 lc#branch -1.27487e-150 0 l7#branch 1.27487e-150 0 l1#branch -5.60813e-160 0 l4#branch 4.99351e-151 0 vin#branch 0 0 vpwr#branch 1.27487e-150 0 doAnalyses: iteration limit reached op simulation(s) aborted Warning -approaching max data size: current size=5.554 kB, limit=0 bytes ngspice 8 -> print all Error(parse.c--checkvalid): V(1): no such vector. Warning -approaching max data size: current size=5.554 kB, limit=0 bytes ngspice 9 -> _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
