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Which circuit is used as active load for an amplifier

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in Linear Integrated Circuits by (39.8k points)
Which circuit is used as active load for an amplifier

(a) Wildar Current source

(b) Darlington pair

(c) Current Mirror

(d) All of the mentioned

I got this question in quiz.

I'd like to ask this question from Operational Amplifier Internal Circuit in division Operational Amplifier of Linear Integrated Circuits

1 Answer

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by (39.8k points)
Right option is (c) Current Mirror

Break it down: Current mirror has DC resistance (order of few kΩ), as quiescent voltage across it is a fraction of supply voltage and current in milliampere.

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