[Ngspice-users] a problem with .MODEL in .SUBCKT

[Piotr Z. <pza...@gm...>]

Hello

A have a subcircuit with models. If I put models before subckt,
everything are ok.
But when I put them inside subcircuit, a problem appear. I get
something like that:

-------------
ngspice -r sym-2.raw -b sym-2.net

Circuit: * gnetlist --nomunge -s -g spice-sdb -o sym-2.net sym-2.sch

Error on line 0 : m.x1.maux x1.g2 x1.c x1.a x1.a sw
Unable to find definition of model sw - default assumed
Error on line 0 : m.x1.maux2 x1.b x1.d x1.g2 x1.g2 sw
Unable to find definition of model sw - default assumed
Error on line 0 : m.x2.maux x2.g2 x2.c x2.a x2.a sw
Unable to find definition of model sw - default assumed
Error on line 0 : m.x2.maux2 x2.b x2.d x2.g2 x2.g2 sw
Unable to find definition of model sw - default assumed
Error on line 0 : m.x3.maux x3.g2 x3.c x3.a x3.a sw
Unable to find definition of model sw - default assumed
Error on line 0 : m.x3.maux2 x3.b x3.d x3.g2 x3.g2 sw
Unable to find definition of model sw - default assumed
Error on line 0 : m.x4.maux x4.g2 x4.c x4.a x4.a sw
Unable to find definition of model sw - default assumed
Error on line 0 : m.x4.maux2 x4.b x4.d x4.g2 x4.g2 sw
Unable to find definition of model sw - default assumed
Doing analysis at TEMP = 27.000000 and TNOM = 27.000000

Warning: x4:dgd: grading coefficient too large, limited to 0.9
Warning: x3:dgd: grading coefficient too large, limited to 0.9
Warning: x2:dgd: grading coefficient too large, limited to 0.9
Warning: x1:dgd: grading coefficient too large, limited to 0.9
Warning: v6: no DC value, transient time 0 value used
Warning: v5: no DC value, transient time 0 value used
Warning: v3: no DC value, transient time 0 value used
Warning: v2: no DC value, transient time 0 value used
No. of Data Columns : 110

Initial Transient Solution
--------------------------

Node                                   Voltage
----                                   -------
3                                            0
5                                            0
<...>
-------------

When models are before the subckt, I get this:

-------------
ngspice -r sym-2.raw -b sym-2.net

Circuit: * gnetlist --nomunge -s -g spice-sdb -o sym-2.net sym-2.sch

Doing analysis at TEMP = 27.000000 and TNOM = 27.000000

Warning: dgd: grading coefficient too large, limited to 0.9
Warning: v6: no DC value, transient time 0 value used
Warning: v5: no DC value, transient time 0 value used
Warning: v3: no DC value, transient time 0 value used
Warning: v2: no DC value, transient time 0 value used
No. of Data Columns : 110

Initial Transient Solution
--------------------------

Node                                   Voltage
----                                   -------
3                                            0
5                                            0
<...>
-------------

IMHO ok.

I check usage of .MODEL in manual and everything sims to be ok.
It shoud work in subckt. It is intentional or only a bag?
Maybe I made something wrong? I know, that there are only a problem
with third usage on NMOS, but why?

-----------------------------------------------------------------------------------------------
<sym-2.sch>
* gnetlist --nomunge -s -g spice-sdb -o sym-2.net sym-2.sch
B1 3 5 V=I(V1)*{K}
C1 14 0 500 IC=28.0
C2 8 0 500 IC=14.0
C3 c1 0 360000 IC=12
C4 1 aku 36 IC=0
L1 2 3 0.00001 IC=0
L2 5 6 0.00001 IC=0
R1 14 sc 0.002
R2 15 pp2 0.2
R22 10 gx1 0.2
R3 8 sc 0.002
R4 c1 1 0.003
R5 1 aku 0.003
R6 4 2 10.005
R7 7 6 0.005
V1 sc vpc 0
V10 7 0 0
V12 9 4 0
V2 10 0 pulse (0 1 70ns 20ns 25ns 200ns 500ns)
V3 13 0 pulse (0 1 270ns 20ns 25ns 200ns 500ns)
V4 pp1 15 0
V5 12 0 pulse (0 1 270ns 20ns 25ns 200ns 500ns)
V6 11 0 pulse (0 1 70ns 20ns 25ns 200ns 500ns)
V7 sc scr1 0
V8 scr1 9 0
V9 aku 9 0
X1 vpc gx1 pp1 IPA90R1K2C3_L0
X2 pp1 13 0 IPA90R1K2C3_L0
X3 vpc 12 pp2 IPA90R1K2C3_L0
X4 pp2 11 0 IPA90R1K2C3_L0
.TRAN 10ns 200us 0 100ns UIC
.INCLUDE Infineon_CoolMOS_C3_900V.lib
.PARAM K=0.000072
.end


<Infineon_CoolMOS_C3_900V.lib>
* *outside subckt*
*.MODEL DMOS   NMOS ( KP= 8.512  VTO=3.4  THETA=0  VMAX=1.5e5  ETA=0  LEVEL=3)
*.MODEL MVDR   NMOS (KP=13.17 VTO=-1   LAMBDA=0.1)
*.MODEL Dbt    D    (BV=900   M=0.55  CJO=1.38n  VJ=0.5V)
*.MODEL DBODY  D    (IS=0.6p  N=1.02  RS=22u  EG=1.12  TT=2u)
*.MODEL sw     NMOS (VTO=0  KP=10   LEVEL=1)
*.MODEL DGD    D    (M=1.2   CJO=1.9n   VJ=0.5)

.SUBCKT IPA90R1K2C3_L0  drain  gate  source
Lg     gate  g1    7n
Ld     drain d1    3n
Ls     source s1   7n
Rs      s1    s2   3m
Rg     g1    g2     1.3
M1      d2    g2    s2    s2    DMOS    L=1u   W=1u
Rd     d2    d1a    0.915 TC=12m
Mr d1 d2a d1a d1a MVDR W=1u L=1u
Rx d2a d1a 1m
Cds1 s2 d2 15.3p
Dbd     s2    d2    Dbt
Dbody   s2   21    DBODY
Rdiode  d1  21    12.25m TC=2m
Maux      g2   c    a    a   sw
Maux2     b    d    g2    g2   sw
Eaux      c    a    d2    g2   1
Eaux2     d    g2   d2    g2   -1
Cox       b    d2   1.9n
Rpar      b    d2   1Meg
Dgd       a    d2   DGD
Rpar2     d2   a    10Meg
Cgs     g2    s2    0.7n

*inside subckt*
.MODEL DMOS   NMOS ( KP= 8.512  VTO=3.4  THETA=0  VMAX=1.5e5  ETA=0  LEVEL=3)
.MODEL MVDR   NMOS (KP=13.17 VTO=-1   LAMBDA=0.1)
.MODEL Dbt    D    (BV=900   M=0.55  CJO=1.38n  VJ=0.5V)
.MODEL DBODY  D    (IS=0.6p  N=1.02  RS=22u  EG=1.12  TT=2u)
.MODEL sw     NMOS (VTO=0  KP=10   LEVEL=1)
.MODEL DGD    D    (M=1.2   CJO=1.9n   VJ=0.5)

.ENDS  IPA90R1K2C3_L0
----------------

  $ ./configure --prefix=/usr --bindir=/usr/bin --libdir=/usr/lib
--mandir=/usr/man --infodir=/usr/info --disable-debug
                     --with-readline=yes --enable-xgraph
--enable-xspice --enable-cider --enable-dot-global
                     --enable-intnoise --enable-numparam
--enable-shared --disable-static --build=i486-slackware-linux


Thanks for advice,

PZ