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Engineering Digital Design
book

Engineering Digital Design

by Richard F. Tinder
January 2000
Intermediate to advanced content levelIntermediate to advanced
884 pages
29h 39m
English
Academic Press
Content preview from Engineering Digital Design
222 CHAPTER 5 / FUNCTION MINIMIZATION
5.10 MULTIPLE OUTPUT FUNCTIONS WITH DON’T CARES
The problem of selecting an optimum bond set is further complicated by the presence of
don’t cares in multiple output systems. Application of the CRMT minimization procedure
given earlier to such systems is illustrated by minimizing the following two four-variable
functions containing don’t cares:
F(A, B, C, D) =
m(3, 6, 8, 9, 12, 15) + φ(1, 4, 5, 11)
and
H(A, B, C, D) =
m(1, 4, 7, 10, 12, 13) + φ(2, 5, 6, 8, 11, 15).
(5.53)
The conventional fourth-order K-maps for functions F and H are shown in Fig. 5.8a.
The don’t cares are so chosen as to best meet the requirements ...
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Publisher Resources

ISBN: 9780126912951