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+// find output voltage 

+// Electronic Principles

+// By Albert Malvino , David Bates

+// Seventh Edition

+// The McGraw-Hill Companies

+// Example 18-8, page 679

+

+clear; clc; close;

+

+// Given data

+R1=1.5*10^3;// in ohms from the given figure

+Rf=75*10^3;// in ohms from the given figure

+Vin=0;// input voltage in mVpp

+Inbias=80*10^-9;// input bias current in amperes        

+Inoff=20*10^-9;// input offset current in amperes

+Vinoff=2*10^-3;// input offset voltage in volts

+Rb1=0;// in ohms

+

+// Calculations

+Rb2=R1*Rf/(R1+Rf);// in ohms

+V1err=(Rb1-Rb2)*Inbias;// unwanted dc error input in volts

+V2err=(Rb1+Rb2)*Inoff/2;// unwanted dc error input in volts

+V3err=Vinoff;// unwanted dc error input in volts

+Avcl=-Rf/R1;// cloased loop voltage gain

+Verror=Avcl*(V1err+V2err+V3err);// output error voltage in volts;

+Vout=Verror;// output voltage in volts

+disp("Volts",Verror,"output error voltage=")

+

+// Result

+// Output voltage will be (+ or -) 94.9 mVolts
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diff --git a/317/CH18/EX18.8/example8.txt b/317/CH18/EX18.8/example8.txt
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+Output voltage will be (+ or -) 94.9 mVolts
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