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+//example 4.1(a)//
+clc
+//clears the screen//
+clear
+//clears already existing variables//
+disp('as given low level, V(o)=0.2V and high level, V(1)=5V')
+disp('case 1, when all the inputs are HIGH')
+//in this case both diodes will be conducting and transistor will be in saturation//
+a=0.7+0.7+0.8;
+//V(p)//
+b=5;
+//high level voltage in volts//
+c=5;
+//resistor in Kohms//
+d=0.8;
+//voltage between base and emitter in volts//
+e=(b-a)/c;
+//I(1)//
+f=d/c;
+//I(2)//
+i=e-f;
+//writing kirchoff's current law at the base of transistor//
+g=0.2;
+//voltage between collector and emitter in saturation(in volts)//
+h=2.2;
+//resistance of collector in Kohms//
+j=(b-g)/h;
+//collector current without load gate connected//
+disp('I(1) in mA:')
+disp(e)
+disp('I(2) in mA:')
+disp(f)
+disp('collector current(in mA):')
+disp(j)
+k=30;
+//h(FE)//
+s=k*i;
+if(s>j)
+disp('transistor is in saturation mode')
+disp('fan out is given by I(c)<=h(FE)I(B)')
+end
+\ No newline at end of file