Electronic – Ltspice running but gives error log. Ignore

ltspice

When I run my simulation it works fine but this log file appears when I close out the simulation. It started this when I changed a third party part that was not working with the model of that part from the mfgrs. list of models. Here is the contents. Can I ignore it and proceed on?

R26: both pins shorted together -- ignoring.
Error on line 1843 : .model m6:bsim3 nmos (level=7 version=3.1 mobmod=3 capmod=2 paramchk=1 nqsmod=0  tox=970e-10 xj=1.4e-6 nch=1.7e17 ua=1.6e-9  u0=700 vsat=1.0e5 drout=3.0 pvag=5  delta=0.10 pscbe2=0 rsh=1.0e-3 pdiblc2=1e-7  vth0=3.50 voff=-0.1 nfactor=1.1  lint=5.90e-7 dlc=5.90e-7 fc=0.5  cgso=1.12e-9 cgsl=0 cgdo=1.05e-14  cgdl=1.68e-9 cj=0 cf=0  ckappa=0.20 kt1=-2.07 kt2=0  ua1=1.02e-9 nj=10 )
    * Unrecognized parameter "fc" -- ignored
Error on line 1843 : .model m5:bsim3 nmos (level=7 version=3.1 mobmod=3 capmod=2 paramchk=1 nqsmod=0  tox=970e-10 xj=1.4e-6 nch=1.7e17 ua=1.6e-9  u0=700 vsat=1.0e5 drout=3.0 pvag=5  delta=0.10 pscbe2=0 rsh=1.0e-3 pdiblc2=1e-7  vth0=3.50 voff=-0.1 nfactor=1.1  lint=5.90e-7 dlc=5.90e-7 fc=0.5  cgso=1.12e-9 cgsl=0 cgdo=1.05e-14  cgdl=1.68e-9 cj=0 cf=0  ckappa=0.20 kt1=-2.07 kt2=0  ua1=1.02e-9 nj=10 )
    * Unrecognized parameter "fc" -- ignored
WARNING: Less than two connections to node NC_01.  This node is used by R:SV1PSPOT:1.
WARNING: Less than two connections to node N003.  This node is used by V2.
Warning: Pscbe2 = 0 is not positive.
Warning: Pd = 0 is less than W.
Warning: Ps = 0 is less than W.
Warning: Pscbe2 = 0 is not positive.
Warning: Pd = 0 is less than W.
Warning: Ps = 0 is less than W.
Instance "m:m3:1": Length shorter than recommended for a level 1 MOSFET.
Instance "m:m3:1": Width narrower than recommended for a level 1 MOSFET.
Per .tran options, skipping operating point for transient analysis.

NOTE:  Since output waveform compression is enabled and not all nodes(currents) are
       saved, it is possible to have compression artifacts in the output data.

Heightened Def Con from 0.428853 to 0.428853

Date: Thu Jul 06 07:04:21 2017
Total elapsed time: 5.890 seconds.

tnom = 27
temp = 27
method = modified trap
totiter = 36564
traniter = 36564
tranpoints = 14814
accept = 10157
rejected = 4658
matrix size = 269
fillins = 417
solver = Normal
Thread vector: 107.1/66.2[2] 23.7/13.8[2] 12.2/7.0[2] 3.6/91.3[1]  2592/500
Matrix Compiler1: 43.39 KB object code size  23.1/12.7/[12.9]
Matrix Compiler2: off  [6.5]/7.1/7.6

Best Answer

I fixed the shorts which were some parts that were not being used and were not needed. Here is the new text I get after fixing those things. Also I will include the part that I got from the manufactures website. I guess I assumed it would be a good part. It replaced the same part that I was using from a third party that did not work at all but that part did not giver errors.

Error on line 1747 : .model m6:bsim3 nmos (level=7 version=3.1 mobmod=3 capmod=2 paramchk=1 nqsmod=0  tox=970e-10 xj=1.4e-6 nch=1.7e17 ua=1.6e-9  u0=700 vsat=1.0e5 drout=3.0 pvag=5  delta=0.10 pscbe2=0 rsh=1.0e-3 pdiblc2=1e-7  vth0=3.50 voff=-0.1 nfactor=1.1  lint=5.90e-7 dlc=5.90e-7 fc=0.5  cgso=1.12e-9 cgsl=0 cgdo=1.05e-14  cgdl=1.68e-9 cj=0 cf=0  ckappa=0.20 kt1=-2.07 kt2=0  ua1=1.02e-9 nj=10 )
   * Unrecognized parameter "fc" -- ignored
Error on line 1747 : .model m5:bsim3 nmos (level=7 version=3.1 mobmod=3 capmod=2 paramchk=1 nqsmod=0  tox=970e-10 xj=1.4e-6 nch=1.7e17 ua=1.6e-9  u0=700 vsat=1.0e5 drout=3.0 pvag=5  delta=0.10 pscbe2=0 rsh=1.0e-3 pdiblc2=1e-7  vth0=3.50 voff=-0.1 nfactor=1.1  lint=5.90e-7 dlc=5.90e-7 fc=0.5  cgso=1.12e-9 cgsl=0 cgdo=1.05e-14  cgdl=1.68e-9 cj=0 cf=0  ckappa=0.20 kt1=-2.07 kt2=0  ua1=1.02e-9 nj=10 )
   * Unrecognized parameter "fc" -- ignored
Warning: Pscbe2 = 0 is not positive.
Warning: Pd = 0 is less than W.
Warning: Ps = 0 is less than W.
Warning: Pscbe2 = 0 is not positive.
Warning: Pd = 0 is less than W.
Warning: Ps = 0 is less than W.
Instance "m:m3:1": Length shorter than recommended for a level 1 MOSFET.
Instance "m:m3:1": Width narrower than recommended for a level 1 MOSFET.
Per .tran options, skipping operating point for transient analysis.
Heightened Def Con from 0.589734 to 0.589734

Date: Fri Jul 07 08:38:35 2017
Total elapsed time: 36.055 seconds.

tnom = 27
temp = 27
method = modified trap
totiter = 236482
traniter = 236482
tranpoints = 62603
accept = 46734
rejected = 15870
matrix size = 262
fillins = 428
solver = Normal
Matrix Compiler1: 44.92 KB object code size  23.9/41.1/[8.5]
Matrix Compiler2: 29.26 KB object code size  7.3/18.3/[4.6]

Heres the part file that caused this error log when I added it with a .include statement.

**************** Power Discrete MOSFET Electrical Circuit Model *****************
** Product Name: FQH8N100C
** 1000V N-Channel MOSFET and TO-247
** Model Type: BSIM3V3
**-------------------------------------------------------------------------------
.SUBCKT FQH8N100C 2 1 3    
*Nom Temp=25 deg C
Dbody 7 5    DbodyMOD
Dbreak 5 11  DbreakMOD
Ebreak 11 7 17 7 1000
Lgate 1 9    1.125e-9
Ldrain 2 5   1.440e-9
Lsource 3 7  9.106e-10
RLgate 1 9   11.25
RLdrain 2 5  14.4
RLsource 3 7 9.11
Rgate 9 6    0.5
It 7 17      1
Rbreak 17 7  RbreakMOD 1
.MODEL RbreakMOD RES (TC1=1.18e-3 TC2=-1.15e-6)
.MODEL DbodyMOD D (IS=6.45e-9  N=1.5      RS=4.44e-3   TRS1=3.8e-3 TRS2=5.8e-6 
+ CJO=1.76e-09     M=0.53      VJ=0.45    TT=1.09e-6   XTI=3       EG=1.154)
.MODEL DbreakMOD D (RS=100e-3 TRS1=1.0e-3 TRS2=5.0e-6)
Rdrain 5 16 RdrainMOD 1.2
.MODEL RdrainMOD RES (TC1=8.8e-3 TC2=1.66e-5)
M_BSIM3 16 6 7 7 Bsim3 W=1.08 L=2.0e-6 NRS=1
.MODEL  Bsim3 NMOS (LEVEL=7 VERSION=3.1 MOBMOD=3 CAPMOD=2 PARAMCHK=1 NQSMOD=0
+ TOX=970e-10    XJ=1.4e-6      NCH=1.7e17      UA=1.6e-9
+ U0=700         VSAT=1.0e5     DROUT=3.0       PVAG=5
+ DELTA=0.10     PSCBE2=0       RSH=1.0e-3      PDIBLC2=1e-7
+ VTH0=3.50      VOFF=-0.1      NFACTOR=1.1     
+ LINT=5.90e-7   DLC=5.90e-7    FC=0.5
+ CGSO=1.12e-9   CGSL=0         CGDO=1.05e-14
+ CGDL=1.68e-9   CJ=0           CF=0 
+ CKAPPA=0.20    KT1=-2.07      KT2=0
+ UA1=1.02e-9    NJ=10 )
.ENDS

******************** Power Discrete MOSFET Thermal Model ************************
** 1000V N-Channel MOSFET and TO-247
**-------------------------------------------------------------------------------
.SUBCKT FQH8N100C_Thermal TH TL
CTHERM1 TH 6 1.12e-5
CTHERM2 6 5  1.53e-3
CTHERM3 5 4  1.82e-2
CTHERM4 4 3  6.45e-2
CTHERM5 3 2  8.12e-2
CTHERM6 2 TL 5.21e-1 
RTHERM1 TH 6 4.00e-4
RTHERM2 6 5  8.10e-3
RTHERM3 5 4  3.40e-2
RTHERM4 4 3  9.10e-2
RTHERM5 3 2  1.02e-1
RTHERM6 2 TL 3.24e-1
.ENDS FQH8N100C_Thermal
**-------------------------------------------------------------------------------
** Creation: Jan.-05-2010   Rev.: 0.0
** Fairchild Semiconductor

Related Solutions

Syntax error in LTspice

As i was not able to get an answer, i looked for alternatives for a PWM source and found one. IT DOES NOT ANSWER THIS QUESTION but does help if someone wants to include a PWM source in there schematic. Here you will find a snapshot of the PWM source with the required details

Thank you!

Electronic – LTSpice: Pass/Fail in Error Log if Voltage < Constant Reference

I did this with 1 bsource and an SR-latch. The results are shown below, the first source is just a sine wave with increasing amplitude. The second b-source detects whether the threshold is above 7mV (vout2 node) and the latch triggers the first time vout2 goes high and then stays high. Then measure it at the end of the file.

This is not the same logic that you want but the functionality is the same. I don't see a way to do this with only b-sources, my attempts by using a delay yielded results with NaN's (which I didn't even know LT spice could produce until now).

* C:\Draft7.asc
B1 Vout 0 V=time*0.01*sin(2*pi*time*10)
B2 Vout2 0 V=if(V(vout)<0.007,0,1)
A1 Vout2 0 0 0 0 0 Vout3 0 SRFLOP
.tran 1
.backanno
.end

If you wanted to you could use the netlist below to generate a part so it you could include it in other files and containerize it.

B2 Vinternal 0 V=if(V(Vin)<V(condition),0,1)
A1 Vinternal 0 0 0 0 0 test_result 0 SRFLOP

You cannot do what you describe with a .meas statment (which is why I posted the first example):

The only option with a .meas statement is to have a conditional

.meas TRAN x FIND time WHEN V(vout)=0.007 CROSS=1

or rise would work as well (which measures the time of the rising edge)

.meas TRAN x FIND time WHEN V(vout)=0.007 RISE=1

from the above example this prints out the time of the first crossing of vout, that isn't what you want, you want a pass/fail.

So you run the cross

.meas TRAN xx FIND if(time<1,0,1) WHEN V(vout2)=0.007 CROSS=1

This is the output of the simulator not exactly what you want but it does have a conditional

xx: if(time<1,0,1)=0 at 0.721136

However what happens if there isn't a crossing? If we change cross to 8 (there are only six crossings) it does not meet the condition.

.meas TRAN x FIND time WHEN V(vout)=0.007 CROSS=8

This is what the simulator outputs:

Measurement "x" FAIL'ed

There isn't a way to measure when a CROSS or a RISE fails because when the .meas statement does not find the condition it fails the whole condition so there is only a way to find if a condition is met by using .meas statements. If the condition fails, you don't know why it failed only that it did fail.

Best Answer

Related Solutions

Syntax error in LTspice

Electronic – LTSpice: Pass/Fail in Error Log if Voltage < Constant Reference

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