GATE EE 2022 Set 1 — Question 44
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Analog & Digital Electronics → Amplifiers & Feedback → Ideal & Non-Ideal Op-Amp
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Question
The current gain () in the circuit with an ideal current amplifier given below is
Correct answer
(C) (C_c)/(C_f)
Solution
For an ideal operational amplifier, the inverting terminal is at virtual ground ( V).
1.Apply KCL at the inverting node. The input current is shown flowing out of the node (arrow pointing down). The current through the feedback capacitor is .
2.By KCL at the inverting node: .
3.The output current flows through the capacitor to ground: .
4.The current gain is calculated as the ratio of to :
Therefore, the correct option is (C).Continue learning with Success Tracker
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