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//Example 7.4
clear;
clc;
R=10*10^3;
k=1.38*10^(-23);
T=25+273;//Room Temperature in Kelvin
eR=sqrt(4*k*T*R);
printf("(a) Noise Voltage(eR)=%.2f nV/sqrt(Hz)",eR*10^9);
iR=eR/R;
printf("\n(b) Noise Current(iR)=%.2f pA/sqrt(Hz)",iR*10^12);
fH=20*10^3;
fL=20;
ER=eR*sqrt(fH-fL);
printf("\n(c) rms noise voltage over audio range=%.2f uV",ER*10^6);
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