//chapter 8
//example 8.6
//page 322
printf("\n")
printf("given")
fT=50*10^6;hfe=50;f2o=60*10^3;Rc=10*10^3;
fae=fT/hfe
C4=(1/(2*3.14*f2o*Rc))*10^12;
printf("capacitance required for C4 to give 60kHz upper cutoff frequency is %dpF\n",C4)