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Message-ID:	<53246DFD.7030002@systella.fr>
Date:	Sat, 15 Mar 2014 16:13:01 +0100
From:	=?ISO-8859-1?Q?BERTRAND_Jo=EBl?= <joel DOT bertrand AT systella DOT fr>
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To:	geda-user AT delorie DOT com
Subject:	[geda-user] gschem and ngspice simulation
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Reply-To:	geda-user AT delorie DOT com

	Hello,

	I'm trying to use ngspice with gEDA without any success. I have 
designed a very simple amplifier in gschem and created netlist with 
gnetlist. I obtain :

C1 1 2 10uF
C2 0 3 10uF
Q1 3 2 Vout Q2N3904
R1 2 4 27k
R2 Vout 4 3k3
R3 0 2 2k
R4 0 3 100
R5 1 Vin 10
R6 0 1 2k
V1 4 0 DC 15V
V2 Vin 0 DC 1.5V AC 10MV SIN(0 1MV 1KHZ)
.MODEL Q2N3904 NPN(IS=1.4E-14 BF=300 VAF=100 IKF=0.025 ISE=3E-13
+ BR=7.5 RC=2.4 CJE=4.5E-12 TF=4E-10 CJC=3.5E-12 TR=2.1E-8 XTB=1.5     + 
KF=9E-16 )

.OPTIONS NOPAGE NUMDGT=6 UNITS=Degrees WIDTH=104 ABSTOL=0.00 
+CHGTOL=0.00 DEFL=0.00Meg DEFW=0.00Meg GMIN=0.00 PIVREL=-1.798E+306 
+PIVTOL=0.00 RELTOL=-1.798E+306 TEMP=20.00
.PRINT TRAN V(Vout) V(Vin)
.TRAN 1.00m 1.00 0.00m

.END

ngspice only returns :

Transient solution failed -

Last Node Voltages
------------------

Node                           Last Voltage        Previous Iter
----                           ------------        -------------
1                                         0                    0
2                                         0          3.49138e-07 *
3                                         0          9.46935e-17 *
vout                                      0           5.0625e-06 *
4                                         0           5.0625e-06 *
vin                                       0                    0
v2#branch                                 0                    0
v1#branch                                 0         -1.74569e-10 *



CPU time since last call: 0.048 seconds.

Total CPU time: 0.048 seconds.

Total DRAM available = 3561.660156 MB.
DRAM currently available = 520.246094 MB.
Total ngspice program size = 11.472656 MB.
Resident set size = 892.000 kB.
Shared ngspice pages = 591.000 kB.
Text (code) pages = 1.221680 MB.
Stack = 0 bytes.
Library pages = 334.000 kB.

Note: Starting dynamic gmin stepping
Trying gmin =   1.0000E-03 Warning: Further gmin increment
Trying gmin =   5.6234E-03 Warning: Further gmin increment
Trying gmin =   8.6596E-03 Warning: Further gmin increment
Trying gmin =   9.6466E-03 Warning: Further gmin increment
Trying gmin =   9.9105E-03 Warning: Further gmin increment
Trying gmin =   9.9775E-03 Warning: Further gmin increment
Trying gmin =   9.9944E-03 Warning: Further gmin increment
Trying gmin =   9.9986E-03 Warning: Further gmin increment
Trying gmin =   9.9996E-03 Warning: Last gmin step failed
Warning: Dynamic gmin stepping failed
Note: Starting source stepping
Supplies reduced to   0.0000% Note: One successful source step
Supplies reduced to   0.1000% Supplies reduced to   0.0000% Note: One 
successful source step
Supplies reduced to   0.0100% Supplies reduced to   0.0000% Note: One 
successful source step
Supplies reduced to   0.0015% Supplies reduced to   0.0000% Note: One 
successful source step
Supplies reduced to   0.0002% Supplies reduced to   0.0000% Note: One 
successful source step
Supplies reduced to   0.0000% Warning: source stepping failed
doAnalyses: Too many iterations without convergence

run simulation(s) aborted
Error(parse.c--checkvalid): vout: no such vector.

	I have used spice a long time ago and I don't see where is my mistake. 
Any idea ?

	Best regards,

	JB

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