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enable alternative weak inversion model if parameter subslope is given

This commit is contained in:
Holger Vogt 2018-04-29 08:15:49 +02:00 committed by rlar
parent 93e34540b8
commit 285de59446
1 changed files with 7 additions and 5 deletions
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12
src/spicelib/devices/vdmos/vdmosload.c
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@ -16,6 +16,8 @@ VDMOS: 2018 Holger Vogt
static double
cweakinv(double sl, double shift, double vgst, double vds, double lambda, double beta, double vt, double mtr);
static double
cweakinv2(double sl, double shift, double vgst, double vds, double lambda, double beta, double vt, double mtr);
int
@ -391,22 +393,22 @@ VDMOSload(GENmodel *inModel, CKTcircuit *ckt)
}
else if (model->VDMOSsubslGiven && (here->VDMOSmode == 1)) {
double delta = 0.001;
cdrain = cweakinv(model->VDMOSsubsl, model->VDMOSsubshift, vgst, vds, model->VDMOSlambda,
cdrain = cweakinv2(model->VDMOSsubsl, model->VDMOSsubshift, vgst, vds, model->VDMOSlambda,
Beta, vt, model->VDMOSmtr);
/* gd */
double vds1 = vds + delta;
double cdrp = cweakinv(model->VDMOSsubsl, model->VDMOSsubshift, vgst, vds1, model->VDMOSlambda,
double cdrp = cweakinv2(model->VDMOSsubsl, model->VDMOSsubshift, vgst, vds1, model->VDMOSlambda,
Beta, vt, model->VDMOSmtr);
vds1 = vds - delta;
double cdrm = cweakinv(model->VDMOSsubsl, model->VDMOSsubshift, vgst, vds1, model->VDMOSlambda,
double cdrm = cweakinv2(model->VDMOSsubsl, model->VDMOSsubshift, vgst, vds1, model->VDMOSlambda,
Beta, vt, model->VDMOSmtr);
here->VDMOSgds = (cdrp - cdrm) / (2. * delta);
/* gm */
double vgst1 = vgst + delta;
cdrp = cweakinv(model->VDMOSsubsl, model->VDMOSsubshift, vgst1, vds, model->VDMOSlambda,
cdrp = cweakinv2(model->VDMOSsubsl, model->VDMOSsubshift, vgst1, vds, model->VDMOSlambda,
Beta, vt, model->VDMOSmtr);
vgst1 = vgst - delta;
cdrm = cweakinv(model->VDMOSsubsl, model->VDMOSsubshift, vgst1, vds, model->VDMOSlambda,
cdrm = cweakinv2(model->VDMOSsubsl, model->VDMOSsubshift, vgst1, vds, model->VDMOSlambda,
Beta, vt, model->VDMOSmtr);
here->VDMOSgm = (cdrp - cdrm) / (2. * delta);
here->VDMOSgmbs = 0.;