Question

The circuit as shown in figure, the equivalent gate is

A
NOR gate
B
OR gate
C
AND gate
D
NAND gate
Solution
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Let the outputs of individual gates be labelled as X, Y and Z respectively starting from left to right. we have:Z=¯¯¯¯YY=¯¯¯¯¯¯¯¯¯XX=¯¯¯¯¯X+¯¯¯¯¯X=¯¯¯¯¯XX=¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯A+B⇒Z=X=¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯A+B.Thus, the combination behaves as NOR gate.

1
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