ITT - Index of

ITT9304
MSI Dual Full' Adder
APPLICATIONS - The ITT9304 dual adder has
been designed to be useful in a wide variety of
applications such as addition, parity generation
and checking, code conversion, majority
gating and other applications for which this
combination of logic gates may be useful. The
multifunction capabilities of the ITT9304 dual
adder can be seen from reference to the
applications shown.
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9304
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Figure 12 - FUNCTIONAL BLOCK
REPRESENTATION
The principal of duality allows 2 ways of
representing each adder. The circuit is the
same in both cases but the logic diagrams
differ. The dual diagrams facilitate logic design
and allow a greater understanding of the
capabilities of the device.
Figure 13 - RIPPLE CARRY
PARALLEL ADDITION
Shown above is a high speed ripple carry
parallel addition scheme. Only one and-or-not
gate delay is incurred at each stage allowing a
typical addition speed of (N + 1) x 8 ns, where N
is the number of bits in the word. A similar
scheme will work if the negation inputs are
used, and the design acts as a subtractor when
the complement of one variable is provided.
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100
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PROPAGATION DELAY AND
PACKAGE COUNT AGAINST
WORD LENGTH FOR
RIPPLE CARRY ADDITION
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