Identify the logic function performed by the circuit shown
2009
Identify the logic function performed by the circuit shown
- A.
exclusive OR
- B.
exclusive NOR
- C.
NAND
- D.
NOR
Attempted by 85 students.
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Correct answer: B
The circuit uses four NOR gates. The first gate outputs x NOR y. Subsequent gates simplify to (NOT x) AND y and x AND (NOT y). The final gate computes the NOR of these terms, resulting in NOT((NOT x AND y) OR (x AND NOT y)), which is the Exclusive NOR (XNOR) function.
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