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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
Variable-Time Adder 91
Y3 x3 Y2 x2
I
I FA
I Latch
FA
Yl Xl Yo Xo
FA
--I--
FA
S 3 S 2 S 1 S O
FIGURE 2.20
Pipelined carry-ripple adder (for group size of 1 and n - 4).
C O
2 = 9
l~
Pipelined Adders
The throughput of the adder can be increased by pipelining. To do this, pipeline
registers are introduced to shorten the worst-case carry path. For example, a
C RA adder is divided into groups of bits and latches are introduced, as shown
in Figure
2.26.
Most latches are used to synchronize inputs and outputs since
different parts (groups) are processed at different cycles. The throughput R is
determined by the ...
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Publisher Resources

ISBN: 9781558607989