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Buffer amplifier needs to have

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Buffer amplifier needs to have

(a) Low input resistance and low output resistance

(b) High Input resistance and high output resistance

(c) Low input resistance and high output resistance

(d) High input resistance and low output resistance

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This interesting question is from Circuit Models for Amplifier in chapter Signals and Amplifiers of Electronic Devices & Circuits

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The correct option is (d) High input resistance and low output resistance

To elaborate: Buffer amplifiers are used to connect high input resistance source to a low output resistance load.

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