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Consider the following circuits and arrange them in ascending order of their complexity.

A. First order low pass filter

B. Sallen‐Key filter

C. Fourth order Butterworth low pass filter

D. Non‐inverting amplifier

Choose the correct answer from the options given below

This question was previously asked in
UGC NET Paper 2: Electronic Science 3rd Dec 2021 Shift 2
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  1. D, A, C, B
  2. D, A, B, C
  3. C, B, A, D
  4. B, C, D, A

Answer (Detailed Solution Below)

Option 2 : D, A, B, C
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Detailed Solution

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Fourth order Butterworth low pass filter is the most complex. 

The correct order of complexity is as follows:


Fourth order Butterworth low pass filter > First order low pass filter > Sallen‐Key filter > Non‐inverting amplifier

As, the order increases, the complexity also increases and the operational amplifier is the most simple one among the following. 

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