GATE EE 2023 Set 1 — Question 23
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Question
The chopper circuit shown in figure (i) feeds power to a DC constant current source. The switching frequency of the chopper is . All the components can be assumed to be ideal. The gate signals of switches and are shown in figure (ii). Average voltage across the current source is

Correct answer
(B) 6 V
Solution
1.Switching period .
2.From the gate signals in figure (ii):
- is ON for . During this interval, the output voltage .
- is ON for . During this interval, the output voltage as the current source is shorted by .
- For and , both switches are OFF. The constant current of must have a path. It freewheels through diode , making .
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