GATE EC 2022 Set 1 — Question 42
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Analog Circuits → Frequency-Domain Analysis → Bode Plots
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Question
A circuit with an ideal OPAMP is shown. The Bode plot for the magnitude (in dB) of the gain transfer function () of the circuit is also provided (here, is the angular frequency in rad/s). The values of and are ____________.

Correct answer
(A) R = 3 kΩ, C = 1 μF
Solution
The given circuit consists of a low-pass filter at the non-inverting input of an OPAMP configured as a non-inverting amplifier. The transfer function is given by:From the Bode plot:
1.The low-frequency gain () is .
2.The corner frequency is where the gain drops to . From the plot, this occurs at , so .
Thus, and .Continue learning with Success Tracker
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