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Add #define RESMIN 1e-6 as a minimum resistor value

This commit is contained in:
Holger Vogt 2024-07-12 11:38:08 +02:00
parent 0ac18a37c0
commit a43c6f4916
1 changed files with 11 additions and 1 deletions
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12
src/spicelib/devices/res/resparam.c
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@ -12,6 +12,8 @@ Modified: Apr 2000 - Paolo Nenzi
#include "ngspice/missing_math.h"
#include "ngspice/fteext.h"
#define RESMIN 1e-6
int
RESparam(int param, IFvalue *value, GENinstance *inst, IFvalue *select)
{
@ -37,7 +39,15 @@ RESparam(int param, IFvalue *value, GENinstance *inst, IFvalue *select)
break;
case RES_RESIST:
/* 0 valued resistor causes ngspice to hang -- can't solve for initial voltage */
if ( AlmostEqualUlps( value->rValue, 0, 3 ) ) value->rValue = 0.001; /* 0.001 should be sufficiently small */
// if ( AlmostEqualUlps( value->rValue, 0, 3 ) ) value->rValue = 0.001; /* 0.001 should be sufficiently small */
if (value->rValue >= 0 && value->rValue < RESMIN) {
fprintf(stderr, "Warning: Value of resistor %s is too small, set to %e\n", here->gen.GENname, RESMIN);
value->rValue = RESMIN;
}
else if (value->rValue < 0 && value->rValue > -RESMIN) {
fprintf(stderr, "Warning: Value of resistor %s is too small, set to %e\n", here->gen.GENname, -RESMIN);
value->rValue = -RESMIN;
}
here->RESresist = value->rValue;
here->RESresGiven = TRUE;
break;