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A first-order Butterworth low pass filter is an interconnection of ____________ and ___________

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A first-order Butterworth low pass filter is an interconnection of ____________ and ___________

(a) Single low pass RC circuit, Voltage follower

(b) Low pass RC circuit, Band-pass RC circuit

(c) Low pass RC circuit, LC feedback

(d) Single low pass RC circuit, Power amplifier

This question was addressed to me at a job interview.

Query is from Frequency Filters topic in portion Op-amps and its Applications of Analog Circuits

1 Answer

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Best answer
The correct answer is (a) Single low pass RC circuit, Voltage follower

Explanation: A first-order Butterworth LPF is an interconnection of a single low pass RC circuit and a voltage follower.

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