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//Example 4.22
clc
disp(" f = 2.5 MHz, L = 10 uH, C1 = 0.02 uF")
disp("For Colpitts oscillator, the frequency is given by,")
disp(" f = 1 / 2pi*sqrt(L*C_eq)")
ceq=(1/(4*(%pi^2)*((2.5*10^6)^2)*(10*10^-6)))*10^12 // in pF
format(8)
disp(ceq,"Therefore, C_eq(in pF) =")
disp("(i)But C_eq = C1*C2 / C1+C2")
c2=((0.02*10^-6)/49.348)*10^9 // in nF
format(7)
disp(c2,"Therefore, C2(in nF) =") // answer in textbook is wrong
disp("(ii) L = 2*10 = 20 uH")
disp("and C_eq = 405.284 pF")
f=(1/(2*%pi*sqrt(20*405.284*10^-18)))*10^-6 // in MHz
disp(f," f(in MHz) = 1 / 2*pi*sqrt(L*C_eq) =")
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