GATE 2020 EC – Question 27
In the circuit shown below, all the components are ideal and the input voltage is sinusoidal. The magnitude of the steady-state output $V_o$ (rounded off to two decimal places) is ________ V.
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Correct answer: 644 to 657
Explanation
This is a voltage doubler. In the negative half-cycle, $D_1$ conducts and $C_1$ charges to the peak $V_m=230\sqrt2=325.27$ V. In the positive half-cycle the source and $C_1$ add, and $D_2$ charges $C_2$ to $2V_m$. So $V_o=2\times325.27=650.5$ V.