Which of these is incorrect for a common gate amplifier?(a) It is a currentbuffer(b) It has ∞ output resistance(c) Its input resistance is high(d) It is used as a high-frequency amplifierThis question was addressed to me in an international level competition.I'd like to ask this question from JFET Amplifier in chapter FET Amplifiers of Analog Circuits

Which of these is incorrect for a common gate amplifier?(a) It is a cu

1.	Which of these is incorrect for a common gate amplifier?(a) It is a currentbuffer(b) It has ∞ output resistance(c) Its input resistance is high(d) It is used as a high-frequency amplifierThis question was addressed to me in an international level competition.I'd like to ask this question from JFET Amplifier in chapter FET Amplifiers of Analog Circuits
Answer» RIGHT choice is (c) Its input resistance is high For explanation I WOULD say: A common gate amplifier can be used as a current BUFFER SINCE its current gain is 1. It has very high output resistance (∞) and low input resistance. It is often used as a high-frequency amplifier.

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