1
Wie die modifizierten Gerätemodellparameter (wie W, L, Tox) während der Monte-Carlo-Iterationsschleife an die Teilschaltung übergeben werden?NGSpice Monte Marlo Analyse, wie die Parameter an die Teilschaltung übergeben?
-Tool Version:
[[email protected] inverter]$ ngspice -v
ngspice compiled from ngspice revision 23
Written originally by Berkeley University
Currently maintained by the NGSpice Project
Copyright (C) 1985-1996, The Regents of the University of California
Copyright (C) 1999-2008, The NGSpice Project
[[email protected] inverter]$ uname -a
Linux E7440.DELL 4.4.13-200.fc22.x86_64 #1 SMP Wed Jun 8 15:59:40 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
[[email protected] inverter]$
Testfall:
Hier ist eine kleine eigenständige Testfall, der das Problem demonstriert; Durchführen einer Monte-Carlo-Analyse an einem einfachen Invertergate durch Variieren der Breite und Länge des Transistorkanals.
SPICE3 file
.GLOBAL VDD VBP
V0DD VDD 0 1.1
V0BP VBP 0 1.1
.GLOBAL VSS VBN
V0SS VSS 0 0.0
V0BN VBN 0 0.0
X1 VDD VSS VBP VBN X A INV1
V1 A 0 DC 0 PWL(2501.80p 1.10 2503.02p 1.10 2504.24p 1.10 2505.46p 1.10 2506.68p 1.10 2507.90p 1.09 2509.12p 1.09 2510.34p 1.09 2511.56p 1.09 2512.78p 1.08 2514.00p 1.07 2515.22p 1.06 2516.44p 1.05 2517.66p 1.03 2518.88p 1.01 2520.10p 0.98 2521.32p 0.94 2522.54p 0.88 2523.76p 0.79 2524.98p 0.67 2526.20p 0.55 2527.42p 0.43 2528.64p 0.31 2529.86p 0.22 2531.08p 0.16 2532.30p 0.12 2533.52p 0.09 2534.74p 0.07 2535.96p 0.05 2537.18p 0.04 2538.40p 0.03 2539.62p 0.02 2540.84p 0.01 2542.06p 0.01 2543.28p 0.01 2544.50p 0.01 2545.72p 0.00 2546.94p 0.00 2548.16p 0.00 2549.38p 0.00 2550.60p 0.00)
C1 X 0 12.3f
.OPTIONS NOACCT
.control
save A X
let mc_runs = 25
let run = 0
set curplot = new
set plot_out = $curplot
define unif(nom, var) (nom + (nom*var) * sunif(0))
define aunif(nom, avar) (nom + avar * sunif(0))
define gauss(nom, var, sig) (nom + (nom*var)/sig * sgauss(0))
define agauss(nom, avar, sig) (nom + avar/sig * sgauss(0))
dowhile run <= mc_runs
alter @M1[W] = gauss(0.72u, 0.1, 3)
alter @M1[L] = gauss(0.18u, 0.1, 3)
alter @M2[W] = gauss(0.36u, 0.1, 3)
alter @M2[L] = gauss(0.18u, 0.1, 3)
tran 3p 3n 2n
set run ="$&run"
print run
linearize A X
set plot_tmp = $curplot
setplot $plot_out
if run=0
let time={$plot_tmp}.time
let vin={$plot_tmp}.A
end
let vout{$run}={$plot_tmp}.X
setplot $plot_tmp
let run = run + 1
end
plot {$plot_out}.allv
.endc
.END
.MODEL NFET NMOS(LEVEL=14 VERSION=4.6.5)
.MODEL PFET PMOS(LEVEL=14 VERSION=4.6.5)
.SUBCKT INV1 VDD VSS VBP VBN X A
M1 X A VDD VBP pfet W=0.72u L=0.18u AD=3.6p PD=2.34p AS=3.6p PS=2.34p
M2 X A VSS VBN nfet W=0.36u L=0.18u AD=1.8p PD=1.62p AS=1.8p PS=1.62p
.ENDS
Die SPICE Ausgabe folgt:
[[email protected] inverter]$ ngspice simulate_mc2.sp
******
** ngspice-23 : Circuit level simulation program
** The U. C. Berkeley CAD Group
** Copyright 1985-1994, Regents of the University of California.
** Please get your ngspice manual from http://ngspice.sourceforge.net/docs.html
** Please file your bug-reports at http://ngspice.sourceforge.net/bugrep.html
** Creation Date: Tue Jul 8 03:06:23 UTC 2014
******
Circuit: simulation file
Error: no such device or model name m1
Error: no such device or model name m1
Error: no such device or model name m2
Error: no such device or model name m2
Doing analysis at TEMP = 27.000000 and TNOM = 27.000000
OpenMP: 2 threads are requested in BSIM4
%100.00
No. of Data Rows : 501
run = 0.000000e+00
Error: no such device or model name m1
Error: no such device or model name m1
Error: no such device or model name m2
Error: no such device or model name m2
Doing analysis at TEMP = 27.000000 and TNOM = 27.000000
OpenMP: 2 threads are requested in BSIM4
%100.00
No. of Data Rows : 501
run = 1.000000e+00
Error: no such device or model name m1
Error: no such device or model name m1
Error: no such device or model name m2
Error: no such device or model name m2
Doing analysis at TEMP = 27.000000 and TNOM = 27.000000
OpenMP: 2 threads are requested in BSIM4
%100.00
No. of Data Rows : 501
run = 2.000000e+00
Error: no such device or model name m1
Error: no such device or model name m1
Error: no such device or model name m2
Error: no such device or model name m2
Doing analysis at TEMP = 27.000000 and TNOM = 27.000000
OpenMP: 2 threads are requested in BSIM4
%100.00nce value : 2.55551e-09
No. of Data Rows : 501
run = 3.000000e+00
Offensichtlich etwas mit dem Führen der Parameter auf die Teilschaltung schief geht. Ich habe auch versucht die folgende Syntax Variationen:
alter [email protected][W] = gauss(0.72u, 0.1, 3)
alter X1:@M1[W] = gauss(0.72u, 0.1, 3)
alter X1/@M1[W] = gauss(0.72u, 0.1, 3)
alter @X1.M1[W] = gauss(0.72u, 0.1, 3)
alter @X1:M1[W] = gauss(0.72u, 0.1, 3)
alter @X1/M1[W] = gauss(0.72u, 0.1, 3)
alter @[email protected][W] = gauss(0.72u, 0.1, 3)
alter @X1:@M1[W] = gauss(0.72u, 0.1, 3)
alter @X1/@M1[W] = gauss(0.72u, 0.1, 3)
alter @X1[M1[W]] = gauss(0.72u, 0.1, 3)
alter @X1(M1[W]) = gauss(0.72u, 0.1, 3)
alter @X1{M1[W]} = gauss(0.72u, 0.1, 3)
Nichts funktioniert ...
By the way, wenn ich die Teilschaltung Inhalt innerhalb des Haupt netlist bewegen, Simulation funktioniert ..
. Beispiel:
SPICE3 file
.GLOBAL VDD VBP
V0DD VDD 0 1.1
V0BP VBP 0 1.1
.GLOBAL VSS VBN
V0SS VSS 0 0.0
V0BN VBN 0 0.0
M1 X A VDD VBP pfet W=0.72u L=0.18u AD=3.6p PD=2.34p AS=3.6p PS=2.34p
M2 X A VSS VBN nfet W=0.36u L=0.18u AD=1.8p PD=1.62p AS=1.8p PS=1.62p
V1 A 0 DC 0 PWL(2501.80p 1.10 2503.02p 1.10 2504.24p 1.10 2505.46p 1.10 2506.68p 1.10 2507.90p 1.09 2509.12p 1.09 2510.34p 1.09 2511.56p 1.09 2512.78p 1.08 2514.00p 1.07 2515.22p 1.06 2516.44p 1.05 2517.66p 1.03 2518.88p 1.01 2520.10p 0.98 2521.32p 0.94 2522.54p 0.88 2523.76p 0.79 2524.98p 0.67 2526.20p 0.55 2527.42p 0.43 2528.64p 0.31 2529.86p 0.22 2531.08p 0.16 2532.30p 0.12 2533.52p 0.09 2534.74p 0.07 2535.96p 0.05 2537.18p 0.04 2538.40p 0.03 2539.62p 0.02 2540.84p 0.01 2542.06p 0.01 2543.28p 0.01 2544.50p 0.01 2545.72p 0.00 2546.94p 0.00 2548.16p 0.00 2549.38p 0.00 2550.60p 0.00)
C1 X 0 12.3f
.OPTIONS NOACCT
.control
save A X
let mc_runs = 5
let run = 0
set curplot = new
set plot_out = $curplot
define unif(nom, var) (nom + (nom*var) * sunif(0))
define aunif(nom, avar) (nom + avar * sunif(0))
define gauss(nom, var, sig) (nom + (nom*var)/sig * sgauss(0))
define agauss(nom, avar, sig) (nom + avar/sig * sgauss(0))
dowhile run <= mc_runs
alter @M1[W] = gauss(0.72u, 0.1, 3)
alter @M1[L] = gauss(0.18u, 0.1, 3)
alter @M2[W] = gauss(0.36u, 0.1, 3)
alter @M2[L] = gauss(0.18u, 0.1, 3)
tran 3p 3n 2n
set run ="$&run"
print run
linearize A X
set plot_tmp = $curplot
setplot $plot_out
if run=0
let time={$plot_tmp}.time
let vin={$plot_tmp}.A
end
let vout{$run}={$plot_tmp}.X
setplot $plot_tmp
let run = run + 1
end
plot {$plot_out}.allv
.endc
.END
.MODEL NFET NMOS(LEVEL=14 VERSION=4.6.5)
.MODEL PFET PMOS(LEVEL=14 VERSION=4.6.5)
Ergebnis:
[[email protected] inverter]$ ngspice simulate_mc1.sp
******
** ngspice-23 : Circuit level simulation program
** The U. C. Berkeley CAD Group
** Copyright 1985-1994, Regents of the University of California.
** Please get your ngspice manual from http://ngspice.sourceforge.net/docs.html
** Please file your bug-reports at http://ngspice.sourceforge.net/bugrep.html
** Creation Date: Tue Jul 8 03:06:23 UTC 2014
******
Circuit: simulation file
Doing analysis at TEMP = 27.000000 and TNOM = 27.000000
OpenMP: 2 threads are requested in BSIM4
%100.00
No. of Data Rows : 501
run = 0.000000e+00
Doing analysis at TEMP = 27.000000 and TNOM = 27.000000
OpenMP: 2 threads are requested in BSIM4
%100.00
No. of Data Rows : 501
run = 1.000000e+00
Doing analysis at TEMP = 27.000000 and TNOM = 27.000000
OpenMP: 2 threads are requested in BSIM4
%100.00
No. of Data Rows : 501
run = 2.000000e+00
Doing analysis at TEMP = 27.000000 and TNOM = 27.000000
OpenMP: 2 threads are requested in BSIM4
%100.00nce value : 2.52249e-09
No. of Data Rows : 501
run = 3.000000e+00
Dies ist jedoch keine praktische Lösung. Ich möchte auch andere Zellen simulieren, aber das Kopieren der Inhalte verschiedener Unterschaltungen in die Hauptnetzliste ist umständlich und fehleranfällig.