First slide

Logic gates

Question

Which logic gate is represented by the following combination of logic gates?

Easy

A

AND
B

NOR
C

OR
D

NAND

Solution

The Boolean expression of this arrangement is
$Y = \bar{\bar{A} + \bar{B}} = \bar{\bar{A}} \cdot \bar{\bar{B}} = A \cdot B$
$Thus, the combination represents AND gate.$

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