What type of logic circuit is represented by the figure shown below?

2006

What type of logic circuit is represented by the figure shown below?

image.png

  1. A.

    XOR

  2. B.

    XNOR

  3. C.

    XAND

  4. D.

    XNAND

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Correct answer: B

First, analyze the top path where inputs A and B pass through inverters before entering an AND gate. This produces the term A'B'.

Next, observe the bottom path where inputs A and B enter an AND gate directly. This produces the term AB.

Finally, the outputs of these two paths are combined by an OR gate to yield X = AB + A'B'.

This Boolean expression represents the XNOR (Exclusive-NOR) logic function.

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