//chapter 14
//example 14.1
//page 597
printf("\n")
printf("given")
Vbe=.7;Ib=500*10^-9;
R1=Vbe/(10*Ib);
R1=120*10^3//use standard value
R2=R1;
I2=100*Ib
Vr1=15;Vr2=Vr1;
R1=Vr1/I2
R1=270*10^3;//use satndard value
R2=R1;
R3=(R1*R2)/(R1+R2)