Product of Sums
A boolean equation in the form: f = (or_term) (or_term)… (or_term) is called a Product of Sums (POS).
Y = (A+B) (C+D)
Implementing this logic in two levels of gating is easy.
Or-And form
A
B
C
D
7408
7432
7432
7402
7402
7402
A
B
C
D
Y
Y
Nor-Nor form drawn in mixed logic convention
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