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The AND gate is a
digital logic gate that implements logical conjunction - it
behaves according to the truth table to the right. A HIGH output
(1) results only if both the inputs to the AND gate are HIGH
(1). If neither or only one input to the AND gate is HIGH, a LOW
output results.
The AND gate has two or
more inputs and one
output.
The output voltage goes
high only when all input
voltages are high.
In
the switch diagram the
lamp lights up only when
A
and
B are operated. If only
one is switched then the
lamp stays off.
In
the truth table Z = 1
only when A
and
B
= 1
The Boolean expression
is A. B = Z which
translated says, A and B
both high, makes Z high.
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