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The ideal values for the input resistance (Ri) and the output resistance (Ro) of a transconductance amplifier are

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The ideal values for the input resistance (Ri) and the output resistance (Ro) of a transconductance amplifier are

(a) Ri = 0 and Ro = 0

(b) Ri = ∞ and R0 = ∞

(c) Ri = 0 and R0 = ∞

(d) Ri = ∞ and Ri = 0

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My enquiry is from Circuit Models for Amplifier in division Signals and Amplifiers of Electronic Devices & Circuits

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Right option is (b) Ri = ∞ and R0 = ∞

The explanation is: It is a desired characteristics of transconductance amplifier ideally.

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