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Added a new function to take into account dtemp.

This commit is contained in:
pnenzi 2003-09-20 20:21:08 +00:00
parent 56232ed6c7
commit 5292806527
1 changed files with 40 additions and 0 deletions
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40
src/spicelib/analysis/nevalsrc.c
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@ -49,3 +49,43 @@ NevalSrc (double *noise, double *lnNoise, CKTcircuit *ckt, int type, int node1,
}
}
/*
PN 2003:
The following function includes instance dtemp in
thermal noise calculation.
It will replace NevalSrc as soon as all devices
will implement dtemp feature.
*/
void
NevalSrc2 (double *noise, double *lnNoise, CKTcircuit *ckt, int type,
int node1, int node2, double param, double param2)
{
double realVal;
double imagVal;
double gain;
realVal = *((ckt->CKTrhs) + node1) - *((ckt->CKTrhs) + node2);
imagVal = *((ckt->CKTirhs) + node1) - *((ckt->CKTirhs) + node2);
gain = (realVal*realVal) + (imagVal*imagVal);
switch (type) {
case SHOTNOISE:
*noise = gain * 2 * CHARGE * fabs(param); /* param is the dc current in a semiconductor */
*lnNoise = log( MAX(*noise,N_MINLOG) );
break;
case THERMNOISE:
*noise = gain * 4 * CONSTboltz * (ckt->CKTtemp + param2) /* param2 is the instance temperature difference */
* param; /* param is the conductance of a resistor */
*lnNoise = log( MAX(*noise,N_MINLOG) );
break;
case N_GAIN:
*noise = gain;
break;
}
}