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gEDA-user: Spice Example RF_Amp
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: ngspice-bugs@xxxxxxxxxxxxxxxxxxxxx
** 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 ->
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