First slide

Logic gates

Question

The output Y of the logic circuit shown in figure is best represented as

Moderate

A

$A + B C$
B

$A + B C$
C

$A + B C$
D

$\bar{A + \bar{B} C}$

Solution

At logic gate I, the Boolean expression is $B C$
At logic gate II, the Boolean expression is $A + (B C)$
At logic gate III, the Boolean expression is $\bar{A + B C}$

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