Modeling of MOSFET using ‘C’.

#include<iostream.h>

#include<stdio.h>

#include<conio.h>

#include<math.h>

//global input variables declaration

float vg, vs,vd,W,L;

//global constant declaration

float Vt=0.6;

float e0=3.45*pow(10,-11);

float Tox=10*pow(10,-9);

float q=1.6*pow(10,-19);

int u=700;

//global variable declaration

float Vgs,Vds,Cox,Beta,Ids;

void main()

{

          W=60*pow(10,-6);

          L=6*pow(10,-6);

          clrscr();

          printf("%e",e0);

          getchar();

          printf("\nModelling of nMOSFET\n");

          printf("\-----------------------\n");

          printf("\n Enter the value of vg:\t");

          scanf("%f",&vg);

          printf("\n Enter the value of vs:\t");

          scanf("%f",&vs);

          printf("\n Enter the value of vd:\t");

          scanf("%f",&vd);

          Vgs=vg-vs;

          Vds=vd-vs;

       printf("==========================\n");

          printf("VGS:\t%f",Vgs);

          printf("\nVDS:\t%f",Vds);

          Cox=e0/Tox;

          printf("\nCox:\t%e",Cox);

          Beta=(u*e0*W)/(Tox*L);

          printf("\nBeta:\t%e", Beta);

          if((Vds>0) && Vds< (Vgs-Vt))

          {

                      printf("\n====================\n");

                      printf("\n NMOS in linear region\n");

                      Ids=Beta*(((Vgs-Vt)*Vds)-((Vds*Vds)/2));

                      printf("\nIds:\t%e",Ids);

          }

          else if((Vgs-Vt)>0 && (Vgs-Vt)<Vds)

          {

                      printf("\n=========================\n");

                      printf("\n NMOS in saturation region\n");

                      Ids=Beta*(((Vgs-Vt)*(Vgs-Vt))/2);

                      printf("\nIds:\t%e",Ids);

          }

          else

          {

                      printf("\n===========================\n");

                      printf("\n NMOS in Cutoff Region\n");

                      Ids=0;

                      printf("\nIds:\t%e",Ids);

          }

          getch();

          }