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//Variable declaration
C=0.01 //capacitance(uF)
R2=15 //resistance(k ohms)
Va2=4 //voltage(V)
Vcc=15. //supply voltage(V)
R1=33 //resistance(k ohms)
//Calculations
Va1=0.67*Vcc //voltage(V)
Vamax=Va1+Va2 //Va maximum(V)
Vamin=Va1-Va2 //Va minimum(V)
T1max=C*(R1+R2)*(log((1-(Vamax/(2*Vcc)))/(1-(Vamax/Vcc)))) //time period(ms)
T1min=C*(R1+R2)*(log((1-(Vamin/(2*Vcc)))/(1-(Vamin/Vcc)))) //time period(ms)
T2=0.693*R2*C
fmax=1/(T1min+T2) //maximum frequency(K Hz)
fmin=1/(T1max+T2) //miniimum frequency(K Hz)
//Results
printf ("minimum freq is %.2f",fmin)
printf ("maximum freq is %.2f",fmax)
printf(" (solution given in the textbook is incorrect)");
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