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+// Example 3.16
+//  Calculation of ratio of threshold current densities
+// Page no 484
+
+clc;
+clear;
+close;
+
+// Given data
+To1=160;                     // Device temperature
+To2=55;                      // Device temperature
+T1=293;
+T2=353;
+J81=exp(T1/To1);            // Threshold current density 
+J21=exp(T2/To1);
+J82=exp(T1/To2);; 
+J22=exp(T2/To2);; 
+cd1=J21/J81;               // Ratio of threshold current densities
+cd2=J22/J82;
+
+//Display result on command window
+printf("\n Ratio of threshold current densities= %0.2f  ",cd1);
+printf("\n Ratio of threshold current densities= %0.2f  ",cd2);