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+//chapter 11
+//example 11.2
+//page 315
+clear all;
+clc ;
+//given
+f1=100;//lower cutoff frequency Hz
+f2=50;//upper cutoff frequency kHz
+hfe=100;
+hie=1;
+R1=100;R2=33;Rc=12;Rl=120;//kohm
+XC2=round(1000*hie/(1+hfe));
+C2=10^6/(2*%pi*f1*XC2);
+
+Zi=1/(1/R1+1/R2+1/hie);
+C1=10^3/(2*%pi*f1*Zi/10);
+printf("\nC1=%.1f microF,use standard value 18 microF",C1);
+printf("\nC2=%d microF,use standard value 180 microF",C2);
+XC3=Rl/10;
+C3=10^3/(2*%pi*f1*Rl/10);
+printf("\nC3=%.2f microF,use standard value 0.15 microF",C3);
+XC4=(Rc*Rl)/(Rc+Rl);
+C4=10^6/(2*%pi*f2*XC4);
+printf("\nC4=%d pF,use standard value 300 pF",ceil(C4));
+
+
+
+