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//chapter17
//example17.3
//page379
L1=1000d-6 // H
L2=100d-6 // H
M=20d-6 // H
C=20d-12 // F
Lt=L1+L2+2*M
f=1/(2*%pi*(Lt*C)^0.5)
mv=L2/L1
printf("operating frequency = %.3f Hz or %.3f kHz \n",f,f/1000)
printf("feedback function = %.3f",mv)
//in book the answer is 1052 kHz but the accurate answer is 1054.029 kHz
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