gate conductance added

src/spicelib/devices/vdmos/vdmos.c

@@ -95,6 +95,7 @@ IFparm VDMOSmPTable[] = { /* model parameters */
  IOP("lambda",VDMOS_MOD_LAMBDA,IF_REAL,   "Channel length modulation"),
  IOP("rd",    VDMOS_MOD_RD,    IF_REAL,   "Drain ohmic resistance"),
  IOP("rs",    VDMOS_MOD_RS,    IF_REAL,   "Source ohmic resistance"),
+ IOP("rg",    VDMOS_MOD_RG,    IF_REAL,   "Gate ohmic resistance"),
 /*
  Cjo Zero-bias body diode junction capacitance
  Is Body diode saturation current

src/spicelib/devices/vdmos/vdmosdefs.h

@@ -57,6 +57,7 @@ typedef struct sVDMOSinstance {
     double VDMOSsourcePerimiter;
     double VDMOSsourceConductance;   /*conductance of source(or 0):set in setup*/
     double VDMOSdrainConductance;    /*conductance of drain(or 0):set in setup*/
+    double VDMOSgateConductance;    /*conductance of gate(or 0):set in setup*/
     double VDMOStemp;    /* operating temperature of this instance */
     double VDMOSdtemp;   /* operating temperature of the instance relative to circuit temperature*/
 
@@ -284,6 +285,7 @@ typedef struct sVDMOSmodel {       /* model structure for a resistor */
     double VDMOSjctSatCur;   /* input - use tSatCur */
     double VDMOSdrainResistance;
     double VDMOSsourceResistance;
+    double VDMOSgateResistance;
     double VDMOSsheetResistance;
     double VDMOStransconductance;    /* input - use tTransconductance */
     double VDMOSgateSourceOverlapCapFactor;
@@ -320,6 +322,7 @@ typedef struct sVDMOSmodel {       /* model structure for a resistor */
     unsigned VDMOSjctSatCurGiven :1;
     unsigned VDMOSdrainResistanceGiven   :1;
     unsigned VDMOSsourceResistanceGiven  :1;
+    unsigned VDMOSgateResistanceGiven    :1;
     unsigned VDMOSsheetResistanceGiven   :1;
     unsigned VDMOStransconductanceGiven  :1;
     unsigned VDMOSgateSourceOverlapCapFactorGiven    :1;
@@ -391,6 +394,7 @@ enum {
     VDMOS_MOD_LAMBDA,
     VDMOS_MOD_RD,
     VDMOS_MOD_RS,
+    VDMOS_MOD_RG,
     VDMOS_MOD_CBD,
     VDMOS_MOD_CBS,
     VDMOS_MOD_IS,

src/spicelib/devices/vdmos/vdmosmask.c

@@ -45,6 +45,9 @@ VDMOSmAsk(CKTcircuit *ckt, GENmodel *inst, int which, IFvalue *value)
         case VDMOS_MOD_RS:
             value->rValue = model->VDMOSsourceResistance;
             return(OK);
+        case VDMOS_MOD_RG:
+            value->rValue = model->VDMOSgateResistance;
+            return(OK);
         case VDMOS_MOD_CBD:
             value->rValue = model->VDMOScapBD;
             return(OK);

src/spicelib/devices/vdmos/vdmosmpar.c

@@ -47,6 +47,10 @@ VDMOSmParam(int param, IFvalue *value, GENmodel *inModel)
             model->VDMOSsourceResistance = value->rValue;
             model->VDMOSsourceResistanceGiven = TRUE;
             break;
+        case VDMOS_MOD_RG:
+            model->VDMOSgateResistance = value->rValue;
+            model->VDMOSgateResistanceGiven = TRUE;
+            break;
         case VDMOS_MOD_CBD:
             model->VDMOScapBD = value->rValue;
             model->VDMOScapBDGiven = TRUE;

src/spicelib/devices/vdmos/vdmostemp.c

@@ -327,6 +327,16 @@ VDMOStemp(GENmodel *inModel, CKTcircuit *ckt)
             } else {
                 here->VDMOSsourceConductance = 0;
             }
+            if (model->VDMOSgateResistanceGiven) {
+                if (model->VDMOSgateResistance != 0) {
+                    here->VDMOSgateConductance = here->VDMOSm /
+                        model->VDMOSgateResistance;
+                } else {
+                    here->VDMOSgateConductance = 0;
+                }
+            } else {
+                here->VDMOSgateConductance = 0;
+            }
         }
     }
     return(OK);