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197 lines
7.0 KiB
197 lines
7.0 KiB
/**********
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Copyright 1990 Regents of the University of California. All rights reserved.
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Author: 1985 Thomas L. Quarles
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Modified: 2000 Alansfixes
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**********/
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#include "ngspice.h"
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#include <stdio.h>
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#include "cktdefs.h"
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#include "isrcdefs.h"
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#include "trandefs.h"
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#include "sperror.h"
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#include "suffix.h"
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int
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ISRCload(inModel,ckt)
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GENmodel *inModel;
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CKTcircuit *ckt;
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/* actually load the current current value into the
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* sparse matrix previously provided
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*/
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{
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ISRCmodel *model = (ISRCmodel*)inModel;
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ISRCinstance *here;
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double value;
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double time;
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/* loop through all the current source models */
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for( ; model != NULL; model = model->ISRCnextModel ) {
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/* loop through all the instances of the model */
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for (here = model->ISRCinstances; here != NULL ;
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here=here->ISRCnextInstance) {
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if (here->ISRCowner != ARCHme) continue;
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if( (ckt->CKTmode & (MODEDCOP | MODEDCTRANCURVE)) &&
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here->ISRCdcGiven ) {
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/* load using DC value */
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value = here->ISRCdcValue * ckt->CKTsrcFact;
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} else {
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if(ckt->CKTmode & (MODEDC)) {
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time = 0;
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} else {
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time = ckt->CKTtime;
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}
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/* use transient function */
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switch(here->ISRCfunctionType) {
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case PULSE: {
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double V1, V2, TD, TR, TF, PW, PER;
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double basetime = 0;
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V1 = here->ISRCcoeffs[0];
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V2 = here->ISRCcoeffs[1];
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TD = here->ISRCfunctionOrder > 2
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? here->ISRCcoeffs[2] : 0.0;
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TR = here->ISRCfunctionOrder > 3
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&& here->ISRCcoeffs[3] != 0.0
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? here->ISRCcoeffs[3] : ckt->CKTstep;
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TF = here->ISRCfunctionOrder > 4
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&& here->ISRCcoeffs[4] != 0.0
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? here->ISRCcoeffs[4] : ckt->CKTstep;
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PW = here->ISRCfunctionOrder > 5
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&& here->ISRCcoeffs[5] != 0.0
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? here->ISRCcoeffs[5] : ckt->CKTfinalTime;
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PER = here->ISRCfunctionOrder > 6
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&& here->ISRCcoeffs[6] != 0.0
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? here->ISRCcoeffs[6] : ckt->CKTfinalTime;
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time -= TD;
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if(time > PER) {
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/* repeating signal - figure out where we are */
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/* in period */
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basetime = PER * floor(time/PER);
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time -= basetime;
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}
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if( time <= 0 || time >= TR + PW + TF) {
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value = V1;
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} else if ( time >= TR && time <= TR + PW) {
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value = V2;
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} else if (time > 0 && time < TR) {
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value = V1 + (V2 - V1) * (time) / TR;
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} else { /* time > TR + PW && < TR + PW + TF */
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value = V2 + (V1 - V2) * (time - (TR + PW)) / TF;
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}
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}
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break;
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case SINE: {
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#define VO (*(here->ISRCcoeffs))
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#define VA (*(here->ISRCcoeffs+1))
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#define FREQ (((here->ISRCfunctionOrder >=3) && (*(here->ISRCcoeffs+2)))? \
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(*(here->ISRCcoeffs+2)):(1/ckt->CKTfinalTime))
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#define TD ((here->ISRCfunctionOrder >=4)?(*(here->ISRCcoeffs+3)):(0.0))
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#define THETA ((here->ISRCfunctionOrder >=5)?(*(here->ISRCcoeffs+4)):(0.0))
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time -= TD;
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if (time <= 0) {
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value = VO;
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} else {
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value = VO + VA * sin(FREQ*time * 2.0 * M_PI) *
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exp(-time*THETA);
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}
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#undef VO
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#undef VA
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#undef FREQ
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#undef TD
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#undef THETA
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}
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break;
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case EXP: {
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double td1;
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double td2;
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#define V1 (*(here->ISRCcoeffs))
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#define V2 (*(here->ISRCcoeffs+1))
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#define TD1 ((here->ISRCfunctionOrder >=3)?(*(here->ISRCcoeffs+2)):\
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ckt->CKTstep)
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#define TAU1 (((here->ISRCfunctionOrder >=4) && (*(here->ISRCcoeffs+3)))? \
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(*(here->ISRCcoeffs+3)):ckt->CKTstep)
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#define TD2 (((here->ISRCfunctionOrder >=5) && (*(here->ISRCcoeffs+4)))? \
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(*(here->ISRCcoeffs+4)):TD1+ckt->CKTstep)
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#define TAU2 (((here->ISRCfunctionOrder >=6) && (*(here->ISRCcoeffs+5)))? \
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(*(here->ISRCcoeffs+5)):ckt->CKTstep)
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td1 = TD1;
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td2 = TD2;
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if(time <= td1) {
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value = V1;
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} else if (time <= td2) {
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value = V1 + (V2-V1)*(1-exp(-(time-td1)/TAU1));
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} else {
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value = V1 + (V2-V1)*(1-exp(-(time-td1)/TAU1)) +
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(V1-V2)*(1-exp(-(time-td2)/TAU2)) ;
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}
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#undef V1
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#undef V2
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#undef TD1
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#undef TAU1
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#undef TD2
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#undef TAU2
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}
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break;
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case SFFM:{
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#define VO (*(here->ISRCcoeffs))
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#define VA (*(here->ISRCcoeffs+1))
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#define FC (((here->ISRCfunctionOrder >=3) && (*(here->ISRCcoeffs+2)))? \
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(*(here->ISRCcoeffs+2)):(1/ckt->CKTfinalTime))
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#define MDI ((here->ISRCfunctionOrder>=4)?(*(here->ISRCcoeffs+3)):0.0)
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#define FS (((here->ISRCfunctionOrder >=5) && (*(here->ISRCcoeffs+4)))? \
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(*(here->ISRCcoeffs+4)):(1/ckt->CKTfinalTime))
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value = VO + VA *
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sin((2.0 * M_PI * FC * time) +
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MDI * sin(2.0 * M_PI * FS * time));
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#undef VO
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#undef VA
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#undef FC
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#undef MDI
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#undef FS
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}
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break;
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default:
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value = here->ISRCdcValue * ckt->CKTsrcFact;
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break;
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case PWL: {
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int i;
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if(time< *(here->ISRCcoeffs)) {
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value = *(here->ISRCcoeffs + 1) ;
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break;
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}
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for(i=0;i<=(here->ISRCfunctionOrder/2)-1;i++) {
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if((*(here->ISRCcoeffs+2*i)==time)) {
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value = *(here->ISRCcoeffs+2*i+1);
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goto loadDone;
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}
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if((*(here->ISRCcoeffs+2*i)<time) &&
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(*(here->ISRCcoeffs+2*(i+1)) >time)) {
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value = *(here->ISRCcoeffs+2*i+1) +
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(((time-*(here->ISRCcoeffs+2*i))/
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(*(here->ISRCcoeffs+2*(i+1)) -
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*(here->ISRCcoeffs+2*i))) *
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(*(here->ISRCcoeffs+2*i+3) -
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*(here->ISRCcoeffs+2*i+1)));
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goto loadDone;
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}
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}
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value = *(here->ISRCcoeffs+ here->ISRCfunctionOrder-1) ;
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break;
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}
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}
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}
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loadDone:
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if (ckt->CKTmode & MODETRANOP) value *= ckt->CKTsrcFact;
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*(ckt->CKTrhs + (here->ISRCposNode)) += value;
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*(ckt->CKTrhs + (here->ISRCnegNode)) -= value;
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}
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}
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return(OK);
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}
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