2. The addition finishes when the carries in all bits are defined. That is, the
completion signal is
n--1
F = A NoD (c~ 2.83
The implementation of this signal requires an n-input AND gate. This
might be implemented as a tree of [log m n ] levels of m-input gates.
As in the Type 1 adder, a reset step is required before each addition operation.
The addition time is determined by the longest propagation chain. Consequently,
the worst-case time is similar to that of the carry-ripple adder. However, the
average time depends on the distribution of the operand values. For uniformly
distributed ...
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