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Calculate the value of external timing capacitor, if no modulating input signal is applied to VCO. Consider fo=25 kHz and RT=5 kΩ.

Calculate the value of external timing capacitor, if no modulating input signal is applied to VCO. Consider fo=25 kHz and RT=5 kΩ. Correct Answer 2nF

When modulating input signal is not applied to VCO, the output frequency becomes fo=1/(4×RT×CT) => CT =1/(4×RT×fo) =1/(4×5kΩ×25kHz) = 2×10-9 =2nF.

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