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introduce geometry and frequency dependency for the flicker noise model

This commit is contained in:
dwarning 2015-03-15 10:16:16 +01:00
parent 82b0bc070f
commit 88ef78e53b
6 changed files with 45 additions and 2 deletions
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5
src/spicelib/devices/res/res.c
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@ -58,7 +58,10 @@ IFparm RESmPTable[] = { /* model parameters */
IOPXU( "tnom", RES_MOD_TNOM, IF_REAL,"Parameter measurement temperature"),
IOP( "r", RES_MOD_R, IF_REAL,"Resistor model default value"),
IOPR( "res", RES_MOD_R, IF_REAL,"Resistor model default value"),
IOP( "bv_max", RES_MOD_BV_MAX, IF_REAL,"maximum voltage over resistor")
IOP( "bv_max", RES_MOD_BV_MAX, IF_REAL,"maximum voltage over resistor"),
IOP( "lf", RES_MOD_LF, IF_REAL,"noise area length exponent"),
IOP( "wf", RES_MOD_WF, IF_REAL,"noise area width exponent"),
IOP( "ef", RES_MOD_EF, IF_REAL,"noise frequency exponent")
};
char *RESnames[] = {

10
src/spicelib/devices/res/resdefs.h
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@ -44,6 +44,7 @@ typedef struct sRESinstance {
double REStc2; /* second temperature coefficient of resistors */
double RESbv_max; /* Maximum resistor voltage */
int RESnoisy; /* Set if the resistor generates noise */
double RESeffNoiseArea; /* effective resistor area for noise calculation */
double *RESposPosptr; /* pointer to sparse matrix diagonal at
* (positive,positive) */
double *RESnegNegptr; /* pointer to sparse matrix diagonal at
@ -110,6 +111,9 @@ typedef struct sRESmodel { /* model structure for a resistor */
double RESfNexp; /* Flicker noise exponent */
double RESres; /* Default model resistance */
double RESbv_max; /* Maximum resistor voltage */
double RESlf; /* length exponent for noise calculation */
double RESwf; /* width exponent for noise calculation */
double RESef; /* frequncy exponent for noise calculation */
unsigned REStnomGiven :1; /* flag to indicate nominal temp. was given */
unsigned REStc1Given :1; /* flag to indicate tc1 was specified */
unsigned REStc2Given :1; /* flag to indicate tc2 was specified */
@ -122,6 +126,9 @@ typedef struct sRESmodel { /* model structure for a resistor */
unsigned RESfNexpGiven :1; /* flag to indicate af given */
unsigned RESresGiven :1; /* flag to indicate model resistance given */
unsigned RESbv_maxGiven :1; /* flags indicates maximum voltage is given */
unsigned RESlfGiven :1; /* flags indicates lf is given */
unsigned RESwfGiven :1; /* flags indicates wf is given */
unsigned RESefGiven :1; /* flags indicates ef is given */
} RESmodel;
/* device parameters */
@ -158,6 +165,9 @@ typedef struct sRESmodel { /* model structure for a resistor */
#define RES_MOD_KF 110
#define RES_MOD_AF 111
#define RES_MOD_BV_MAX 112
#define RES_MOD_LF 113
#define RES_MOD_WF 114
#define RES_MOD_EF 115
/* device questions */
#define RES_QUEST_SENS_REAL 201

9
src/spicelib/devices/res/resmask.c
View File

@ -66,6 +66,15 @@ RESmodAsk(CKTcircuit *ckt, GENmodel *inModel, int which, IFvalue *value)
case RES_MOD_R:
value->rValue = model->RESres;
return(OK);
case RES_MOD_LF:
value->rValue = model->RESlf;
return(OK);
case RES_MOD_WF:
value->rValue = model->RESwf;
return(OK);
case RES_MOD_EF:
value->rValue = model->RESef;
return(OK);
default:
return(E_BADPARM);
}

12
src/spicelib/devices/res/resmpar.c
View File

@ -62,6 +62,18 @@ RESmParam(int param, IFvalue *value, GENmodel *inModel)
model->RESbv_max = value->rValue;
model->RESbv_maxGiven = TRUE;
break;
case RES_MOD_LF:
model->RESlf = value->rValue;
model->RESlfGiven = TRUE;
break;
case RES_MOD_WF:
model->RESwf = value->rValue;
model->RESwfGiven = TRUE;
break;
case RES_MOD_EF:
model->RESef = value->rValue;
model->RESefGiven = TRUE;
break;
case RES_MOD_R:
if ( value->rValue > 1e-03 ) {
model->RESres = value->rValue;

2
src/spicelib/devices/res/resnoise.c
View File

@ -135,7 +135,7 @@ RESnoise (int mode, int operation, GENmodel *genmodel, CKTcircuit *ckt,
noizDens[RESFLNOIZ] *= inst->RESm * model->RESfNcoef * exp(model->RESfNexp *
log(MAX(fabs(inst->REScurrent),
N_MINLOG))) / data->freq;
N_MINLOG))) / (inst->RESeffNoiseArea*pow(data->freq,model->RESef));
lnNdens[RESFLNOIZ] = log(MAX(noizDens[RESFLNOIZ],N_MINLOG));
noizDens[RESTOTNOIZ] = noizDens[RESTHNOIZ] + noizDens[RESFLNOIZ];

9
src/spicelib/devices/res/ressetup.c
View File

@ -36,6 +36,9 @@ RESsetup(SMPmatrix *matrix, GENmodel *inModel, CKTcircuit*ckt, int *state)
if(!model->RESshortGiven) model->RESshort = 0.0;
if(!model->RESfNcoefGiven) model->RESfNcoef = 0.0;
if(!model->RESfNexpGiven) model->RESfNexp = 1.0;
if(!model->RESlfGiven) model->RESlf = 1.0;
if(!model->RESwfGiven) model->RESwf = 1.0;
if(!model->RESefGiven) model->RESef = 1.0;
if(!model->RESbv_maxGiven)
model->RESbv_max = 1e99;
@ -67,6 +70,12 @@ RESsetup(SMPmatrix *matrix, GENmodel *inModel, CKTcircuit*ckt, int *state)
if(!here->RESbv_maxGiven)
here->RESbv_max = model->RESbv_max;
if((here->RESwidthGiven)||(here->RESlengthGiven))
here->RESeffNoiseArea = pow((here->RESlength-model->RESshort),model->RESlf)
*pow((here->RESwidth-model->RESnarrow),model->RESwf);
else
here->RESeffNoiseArea = 1.0;
/* macro to make elements with built in test for out of memory */
#define TSTALLOC(ptr,first,second) \
do { if((here->ptr = SMPmakeElt(matrix, here->first, here->second)) == NULL){\