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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
FURTHER READING 605
the effect of complementing the waveforms in Fig. 12.38b to give a down count. However,
to do this does not allow the CK waveform to be used to add an additional bit in the count, as
it can be in Fig. 12.38b. Note that for RET toggle modules, X and
¯
X must be interchanged
in Eq. (12.16).
One important precaution must be recognized when using MUXs together with Eq.
(12.13) for bidirectional ripple counter designs. It is not a good idea to use the 2-to-1 MUXs
for purposes of altering the triggering activation level of the toggle modules by placing the
MUXs between modules. To do so makes it possible for the counter to change count simply
by changing the direction control X while the external clock signal is idle.
FURTHER READING
Nearly ...
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Publisher Resources

ISBN: 9780126912951