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+// Maximum reverse-bias voltage to be maintained

+// Basic Electronics

+// By Debashis De

+// First Edition, 2010

+// Dorling Kindersley Pvt. Ltd. India

+// Example 2-21 in page 99

+

+clear; clc; close;

+

+// Given data

+Rt=0.15*10^-3; // Thermal resistance of mechanical contact between diode and surroundings in mW/degree celcius

+T1=25; // Ambient temperature in degree celcius

+T2=35; // Rise in ambient temperature in degree celcius

+I_25=5*10^-6; // Reverse saturation current at 25 degrees in mu-A

+

+// Calculation

+Po=Rt*(T2-T1);

+printf("P_out = %0.2e mW\n",Po);

+printf("We know that reverse saturation current doubles for every 10 degree rise in temperature\n");

+I_35=2*I_25;

+V=Po/I_35;

+printf("Thus the maximum reverse bias voltage to be maintained is %0.0f V",V);

+

+// Result

+// Maximum reverse bias voltage that can be maintained across diode is 150V
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diff --git a/181/CH2/EX2.21/example2_21.txt b/181/CH2/EX2.21/example2_21.txt
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+P_out = 1.50e-003 mW

+We know that reverse saturation current doubles for every 10 degree rise in temperature

+Thus the maximum reverse bias voltage to be maintained is 150 V 
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