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// Example 7.5.4 page 7.25
clc;
clear;
lamda=0.8d-6;
h=6.625d-34; //plank's constant
c=3d8; //speed of light
q=1.6d-19; //charge of electron
ne=1.8d11; //electrons collected
np=4d11; //photons incident
eta=ne/np; //computing quantum efficiency
R=eta*q*lamda/(h*c); //computing responsivity
printf("\nResponsivity of photodiode at 0.8 micrometer is %.3f A/W.",R);
//answer in the book is 0.289. deviation of 0.001 A/W
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