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Before reading this page
read the one on LOGIC
GATES.
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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