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//chapter16
//example16.8
//page351
Av=10000
R1=2 // kilo ohm
R2=18 // kilo ohm
Vi=1 // mV
mv=R1/(R1+R2)
Avf=Av/(1+Av*mv)
Vout=Avf*Vi
printf("feedback fraction = %.1f \n",mv)
printf("voltage gain with negative feedback = %.1f \n",Avf)
printf("output voltage = %.1f mV \n",Vout)
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