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Consider the circuit shown below. Given that R1=20kΩ, C1=2nF, R2=20kΩ, C2=2nF, find the approximate resonant frequency.

Consider the circuit shown below. Given that R1=20kΩ, C1=2nF, R2=20kΩ, C2=2nF, find the approximate resonant frequency. Correct Answer 4kHz

The resonant frequency for the above Wien Bridge Oscillator circuit is fr = 1/2πRC and since R1=R2 and C1=C2 for this oscillator, for a balanced bridge, we can use either of those. Hence fr = 3.987 kHz≈4kHz.

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