luke
/
ngspice
mirror of https://git.code.sf.net/p/ngspice/ngspice
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

fix a wrong GMIN implementation

This commit is contained in:
dwarning 2013-04-24 20:55:21 +02:00 committed by rlar
parent dc0fbe4220
commit 4ef874bdae
1 changed files with 10 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
src/spicelib/devices/dio/dioload.c
View File

@ -272,8 +272,11 @@ next1: if (model->DIOsatSWCurGiven) { /* sidewall current */
if( (model->DIOforwardKneeCurrent > 0.0) && (cd > 1.0e-18) ) {
ikf_area_m = here->DIOforwardKneeCurrent;
sqrt_ikf = sqrt(cd/ikf_area_m);
gd = ((1+sqrt_ikf)*gd - cd*gd/(2*sqrt_ikf*ikf_area_m))/(1+2*sqrt_ikf + cd/ikf_area_m) + ckt->CKTgmin*vd;
cd = cd/(1+sqrt_ikf) + ckt->CKTgmin;
gd = ((1+sqrt_ikf)*gd - cd*gd/(2*sqrt_ikf*ikf_area_m))/(1+2*sqrt_ikf + cd/ikf_area_m) + ckt->CKTgmin;
cd = cd/(1+sqrt_ikf) + ckt->CKTgmin*vd;
} else {
gd = gd + ckt->CKTgmin;
cd = cd + ckt->CKTgmin*vd;
}
} else { /* limit reverse */
@ -281,8 +284,11 @@ next1: if (model->DIOsatSWCurGiven) { /* sidewall current */
if( (model->DIOreverseKneeCurrent > 0.0) && (cd < -1.0e-18) ) {
ikr_area_m = here->DIOreverseKneeCurrent;
sqrt_ikr = sqrt(cd/(-ikr_area_m));
gd = ((1+sqrt_ikr)*gd + cd*gd/(2*sqrt_ikr*ikr_area_m))/(1+2*sqrt_ikr - cd/ikr_area_m) + ckt->CKTgmin*vd;
cd = cd/(1+sqrt_ikr) + ckt->CKTgmin;
gd = ((1+sqrt_ikr)*gd + cd*gd/(2*sqrt_ikr*ikr_area_m))/(1+2*sqrt_ikr - cd/ikr_area_m) + ckt->CKTgmin;
cd = cd/(1+sqrt_ikr) + ckt->CKTgmin*vd;
} else {
gd = gd + ckt->CKTgmin;
cd = cd + ckt->CKTgmin*vd;
}
}