36. AB+AB
38. Minterm expressions which have been derived from a truth
table may not always be in the simplest form. If the minterm
expressions are plotted on a Veitch diagram, a simplified
expression may be extracted. The SUM and the CARRY
output minterm expressions are plotted on the Veitch
diagrams below.
A
A
B
X
X
SUM=ABK+ABK+ABK+ABK
B
X
X
K
K
K
A
A
B
X
X
X
37
CARRY=ABK+ABK+ABK+ABK
B
X
K
K
K
E
F SUM CARRY
Investigation reveals the expression extracted from the SUM
Veitch diagram is exactly the same as the expression is in
the simplest form.
Extract the simplified expression from the Veitch diagram of
the CARRY function.
IT 0346
1-26
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