noievals.c File Reference

#include "spice.h"
#include <math.h>
#include "cktdefs.h"
#include "noisedef.h"
#include "const.h"
#include "util.h"

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Functions
void	NevalSrc (double *noise, double *lnNoise, CKTcircuit *ckt, int type, int node1, int node2, double param)

Function Documentation

void NevalSrc	(	double *	noise,
		double *	lnNoise,
		CKTcircuit *	ckt,
		int	type,
		int	node1,
		int	node2,
		double	param
	)

Definition at line 29 of file noievals.c.

{
    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:
            /* param is the dc current in a semiconductor */
            *noise = gain * 2 * CHARGE * FABS(param);
            *lnNoise = log( MAX(*noise,N_MINLOG) ); 
            break;

        case THERMNOISE:
            /* param is the conductance of a resistor */
            *noise = gain * 4 * CONSTboltz * ckt->CKTtemp * param;
            *lnNoise = log( MAX(*noise,N_MINLOG) );
            break;

        case N_GAIN:
            *noise = gain;
            break;
    }
}