An implementation using a two-stage pipelined multiplier is shown in
Figure 7.3.
Yot ~3
Initial Approximation
Both methods described require an initial approximation of 1/d. As stated, the
accuracy of this approximation determines the number of iterations. However, it is
necessary to consider also the delay of the module to produce this approximation,
as well as its area.
A variety of methods have been used to obtain the initial approximation. The
selection of the most appropriate method depends on the accuracy, delay, and area
requirements. Some of the alternatives are the following (many variations have
been developed) ...
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