104 lines
3.3 KiB
C
104 lines
3.3 KiB
C
/**********
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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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**********/
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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 "mos2defs.h"
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#include "sperror.h"
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#include "suffix.h"
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int
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MOS2convTest(inModel,ckt)
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GENmodel *inModel;
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register CKTcircuit *ckt;
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{
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register MOS2model *model = (MOS2model *)inModel;
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register MOS2instance *here;
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double delvbs;
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double delvbd;
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double delvgs;
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double delvds;
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double delvgd;
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double cbhat;
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double cdhat;
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double vbs;
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double vbd;
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double vgs;
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double vds;
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double vgd;
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double vgdo;
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double tol;
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for( ; model != NULL; model = model->MOS2nextModel) {
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for(here = model->MOS2instances; here!= NULL;
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here = here->MOS2nextInstance) {
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if (here->MOS2owner != ARCHme) continue;
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vbs = model->MOS2type * (
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*(ckt->CKTrhs+here->MOS2bNode) -
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*(ckt->CKTrhs+here->MOS2sNodePrime));
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vgs = model->MOS2type * (
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*(ckt->CKTrhs+here->MOS2gNode) -
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*(ckt->CKTrhs+here->MOS2sNodePrime));
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vds = model->MOS2type * (
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*(ckt->CKTrhs+here->MOS2dNodePrime) -
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*(ckt->CKTrhs+here->MOS2sNodePrime));
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vbd=vbs-vds;
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vgd=vgs-vds;
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vgdo = *(ckt->CKTstate0 + here->MOS2vgs) -
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*(ckt->CKTstate0 + here->MOS2vds);
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delvbs = vbs - *(ckt->CKTstate0 + here->MOS2vbs);
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delvbd = vbd - *(ckt->CKTstate0 + here->MOS2vbd);
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delvgs = vgs - *(ckt->CKTstate0 + here->MOS2vgs);
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delvds = vds - *(ckt->CKTstate0 + here->MOS2vds);
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delvgd = vgd-vgdo;
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/* these are needed for convergence testing */
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if (here->MOS2mode >= 0) {
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cdhat=
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here->MOS2cd-
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here->MOS2gbd * delvbd +
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here->MOS2gmbs * delvbs +
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here->MOS2gm * delvgs +
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here->MOS2gds * delvds ;
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} else {
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cdhat=
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here->MOS2cd -
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( here->MOS2gbd -
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here->MOS2gmbs) * delvbd -
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here->MOS2gm * delvgd +
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here->MOS2gds * delvds ;
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}
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cbhat=
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here->MOS2cbs +
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here->MOS2cbd +
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here->MOS2gbd * delvbd +
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here->MOS2gbs * delvbs ;
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/*
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* check convergence
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*/
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tol=ckt->CKTreltol*MAX(fabs(cdhat),fabs(here->MOS2cd))+
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ckt->CKTabstol;
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if (fabs(cdhat-here->MOS2cd) >= tol) {
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ckt->CKTnoncon++;
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ckt->CKTtroubleElt = (GENinstance *) here;
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return(OK); /* no reason to continue, we haven't converged */
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} else {
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tol=ckt->CKTreltol*
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MAX(fabs(cbhat),fabs(here->MOS2cbs+here->MOS2cbd))+
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ckt->CKTabstol;
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if (fabs(cbhat-(here->MOS2cbs+here->MOS2cbd)) > tol) {
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ckt->CKTnoncon++;
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ckt->CKTtroubleElt = (GENinstance *) here;
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return(OK); /* no reason to continue, we haven't converged*/
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}
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}
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}
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}
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return(OK);
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}
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