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+clc; close; clear;
+
+Cload=200;//in fF
+Cin=1;//in fF
+N=3;
+Tinv=7.5;//in picoseconds
+Y=0.5;
+f=(Cload/Cin)^(1/N);
+disp(f,'Fanout ratio for 3 stage inverter=');
+tdelay=3*Tinv*(f+Y);
+disp(tdelay,'total delay in 3 stage case(in picoseconds)=');
+f1=3.6;//estimated
+N1=log(Cload/Cin)/log(f1);
+g=round(N1);
+disp(N1,'N=');
+f2=(Cload/Cin)^(1/g);
+disp(f2,'recomputed fanout ratio for 4 stage=');
+tdelay1=4*Tinv*(f2+Y);
+disp(tdelay1,'total delay in 3 stage case(in picoseconds)=');
+//answers vary due to round off error