From 40b9b18b01f1b6d1fb4b32e462ba9562eedbb055 Mon Sep 17 00:00:00 2001
From: Holger Vogt <holger.vogt@uni-due.de>
Date: Mon, 2 Apr 2018 20:10:36 +0200
Subject: [PATCH] gate conductance added

---
 src/spicelib/devices/vdmos/vdmos.c     |  1 +
 src/spicelib/devices/vdmos/vdmosdefs.h |  4 ++++
 src/spicelib/devices/vdmos/vdmosmask.c |  3 +++
 src/spicelib/devices/vdmos/vdmosmpar.c |  4 ++++
 src/spicelib/devices/vdmos/vdmostemp.c | 10 ++++++++++
 5 files changed, 22 insertions(+)

diff --git a/src/spicelib/devices/vdmos/vdmos.c b/src/spicelib/devices/vdmos/vdmos.c
index 22bb4d783..8cd665d69 100644
--- a/src/spicelib/devices/vdmos/vdmos.c
+++ b/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
diff --git a/src/spicelib/devices/vdmos/vdmosdefs.h b/src/spicelib/devices/vdmos/vdmosdefs.h
index 42f0e5a92..83df9d652 100644
--- a/src/spicelib/devices/vdmos/vdmosdefs.h
+++ b/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,
diff --git a/src/spicelib/devices/vdmos/vdmosmask.c b/src/spicelib/devices/vdmos/vdmosmask.c
index d877dea7c..ebd148130 100644
--- a/src/spicelib/devices/vdmos/vdmosmask.c
+++ b/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);
diff --git a/src/spicelib/devices/vdmos/vdmosmpar.c b/src/spicelib/devices/vdmos/vdmosmpar.c
index e1b3a84e1..7d73cf31c 100644
--- a/src/spicelib/devices/vdmos/vdmosmpar.c
+++ b/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;
diff --git a/src/spicelib/devices/vdmos/vdmostemp.c b/src/spicelib/devices/vdmos/vdmostemp.c
index 1eb886766..04fba206a 100644
--- a/src/spicelib/devices/vdmos/vdmostemp.c
+++ b/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);