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One that is not the outcome of magnitude comparator is ____________

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One that is not the outcome of magnitude comparator is ____________

(a) a > b

(b) a – b

(c) a < b

(d) a = b

I got this question by my school principal while I was bunking the class.

The origin of the question is Magnitude Comparator in chapter Combinational Circuits of Digital Circuits

1 Answer

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The correct answer is (b) a – b

Explanation: A comparator is a combinational circuit that takes two numbers as input in binary form and results whether one input is greater, lesser or equal to the other input. In a digital comparator, only 3 outputs are possible (i.e. A = B, A > B, A < B). So, a – b is an incorrect option.

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