Tree arrays of adders: (a) With [3:2] adders. (b) With [4:2] adders.
especially suited for multiplication because the different column height is used
to reduce the number of counters. The height of each column is better shown in
the bit-array of Figure 4.18.
One possibility is to use (3:2] and (2:2] counters. For this case, the design
method presented in Chapter 3 produces Table 4.1 and Figure 4.19. As discussed
also in Chapter ...
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