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Digital Arithmetic
book

Digital Arithmetic

by Miloš D. Ercegovac, Tomás Lang
September 2003
Intermediate to advanced content levelIntermediate to advanced
709 pages
26h 51m
English
Morgan Kaufmann
Content preview from Digital Arithmetic
Carry-Ski p Adder 65
2~
Carry-Skip Adder
The carry-skip adder is obtained by a modification of the carry-ripple adder.
The objective is to reduce the worst-case delay by reducing the number of FA
cells through which the carry has to propagate (see expression (2.21)). To achieve
this, the adder is divided into groups ofm bits and the carry into group j + 1 is
determined by one of the following two conditions:
1. The carry is propagated by group j. That is, the carry-out of group j is
equal to the carry-in of that group. This situation occurs only when the sum
of the inputs to that group is equal to 2 m - 1. Calling x (J) and ...
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Publisher Resources

ISBN: 9781558607989