[eispice] eispice and semi-conductors models
- From: Cyril Giraudon <cyril.giraudon@xxxxxxx>
- To: eispice@xxxxxxxxxxxxx, Christophe Girard <christophe.girard.thales@xxxxxxxxxx>, Didier.ROISSE@xxxxxxxxxxxxxxxxxx
- Date: Mon, 19 Mar 2007 14:13:49 +0100
Hi Charles,
In a few weeks, I will have to integrate a circuits simulator in a more
general framework.
This framework is developed in python (numpy, scipy, matplotlib ...) and
handles problems in the time domain (electromagnetic security issues
inside systems).
Firstly, I thought about building a wrapper around gnucap, but by lack
of time, I haven't been very far in that way.
Al Davis would like such a wrapper, It's still in my plans...
Secondly, I follow your work since the "beginning" of eispice and my
interest grows (I have already written in this mailing list).
However, the major problem is the lack of semi-conductor models in
eispice (expertise weak before IHM, IDE...).
The circuits I manipulate can be composed of the following PSPICE models :
- R, resistance;
- L, inductance;
- C, capacity;
- XFRM_LINEAR, ideal transformer;
- D, Diode;
- NPN, BJT model (NPN bipolar transistor);
- NJF, JFET model (field effect transistor);
- NMOS, MOS model (mos transistors);
- VDC, source tension
- EVALUE, controled tension source;
- GVALUE, controled current source;
- VPWL_FILE, tension source from a file;
- VPULSE, pulsed tension source
- K_linear, coupling coefficient between 2 inductances.
In your last message 'Future Direction of eispice Part 2', you propose
to use the PyB model for diodes, BJT...
Can the PyB model handle all components, particularly with more than 2
branches ?
Can you explain me the way to create a PyB element for a JFET transistor
for instance ?
How do you mix python and C ?
Could Pyrex be a mix method (instead of the C language) to add PyB
models in order to gain time ?
Does the list of features you would to add in the next releases sort the
features by priority ?
Semi-conductor models appear in 7th position, is that to say it's a low
priority ?
What are your plans about the C based implementation of semi conductors ?
Will it be a hard task ?
A lot of questions I see :-)
I imagine I can help you but I don't know the theory of spice-like
simulators (I can learn it)...
I know python, and C languages.
Have you an idea of the time needed to write a model, of the time to get
started ?
What kind of help would you like ?
Thanks a lot,
Cyril.
Here is an exemple of a PSPICE circuit netlist :
Do you see any serious problem which could not allow eispice use ?
* *
*_Netlist des circuit sous PSpice avec les sources d’alimentation primaire_*
*A. **alimentation continue 28V*
* *
M_M1 N645668 N645922 N6459080 N6459080 IRF150
L_L3 N645668 N645818 10
Kn_K2 L_L3 L_L4 1
C_C3 0 VOBSERVABLE 0.47u
L_L4 0 N646100 0.365
R_R7 N646100 N646114 1
R_R5 N645704 N659207 1n
R_R8 0 VOBSERVABLE 1k
R_R10 0 N6459080 1.2
V_V3 N645532 0
+PULSE 0 12 2u 1n 1n 2.5u 5u
R_R9 N645532 N645922 20
R_R6 N659207 N645818 100
X_D5-2 N646114 VOBSERVABLE 0 schemas29nov_D5-2
V_V2 N645704 0 28
.subckt schemas29nov_D5-2 1 2 3
D_D5-1 1 2 STPS20H100CG
D_D5-2 3 2 STPS20H100CG
.ends
*STPS20H100CG *
IS 312.550000E-09
N 1.2955
ISR 10.010000E-21
NR 4.995
IKF .44849
RS 2.776000E-03
CJO 1.391000E-09
VJ .55197
M .50027
EG .69
XTI 2
*IRF150 *
NMOS
LEVEL 3
L 2.000000E-06
W .3
VTO 2.831
KP 20.530000E-06
GAMMA 0
PHI .6
LAMBDA 0
RD 1.031000E-03
RS 1.624000E-03
RG 13.89
RDS 444.400000E+03
IS 194.000000E-18
JS 0
PB .8
PBSW .8
CBD 3.229000E-09
CJ 0
CJSW 0
TT 288.000000E-09
CGSO 9.027000E-09
CGDO 1.679000E-09
CGBO 0
TOX 100.000000E-09
XJ 0
UCRIT 10.000000E+03
DELTA 0
ETA 0
DIOMOD 1
VFB 0
LETA 0
WETA 0
U0 0
TEMP 0
VDD 0
XPART 0
**
* *
*B. **alimentation alternative 115V*
* *
R_R3 N660524 N660285 1
D_D2 N660285 N660273 D1N5617/-55C
L_L1 0 N660699 35
R_R1 N660215 N660889 1n
D_D3 0 N660479 D1N5617/-55C
L_L2 N660479 N660524 0.105
D_D4 N660479 N660273 D1N5617/-55C
Kn_K1 L_L1 L_L2 1
C_C2 0 N660273 150u
C_C1 N660479 N660285 0.1u
R_R4 0 N660273 3.9k
R_R2 N660889 N660699 100
D_D1 0 N660285 D1N5617/-55C
V_V1 N660215 0
+SIN 0 115 400 0 0 0
* *
*D1N5617/-55C *
* IS 418.570000E-09 *
* N 2.402374 *
* BV 660 *
* IBV 1.000000E-06 *
* RS .130038 *
* TT 88.100000E-09 *
* CJO 23.036800E-12 *
* VJ .4 *
* M .389478 *
* FC .819179 *
* XTI 2.908969*
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