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Logic Gates

Q1: The output of an exclusive-NOR gate is HIGH if ________.

A the inputs are equal

B one input is HIGH, and the other input is LOW

C the inputs are unequal

D none of the above

ANS:A - the inputs are equal

Ex nor =((AB')+(A'B))'.
=(AB')'.(A'B)'
=(A'+B'').(A''+B')
=A'A+A'B'+BA+BB'
=A'B'+AB
Note; (a+b)'=a'.b'
a'a=0
b'b=0.



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