Question: In Figure 3.17 we presented the structure of a hierarchical carry-lookahead adder. Show the complete circuit for a four-bit version of this adder, built using

In Figure 3.17 we presented the structure of a hierarchical carry-lookahead adder. Show the complete circuit for a four-bit version of this adder, built using 2 two-bit blocks.

32 31-24 31-24 Block 3 G3 P3 $31-24 ... C24 Second-level lookahead

32 31-24 31-24 Block 3 G3 P3 $31-24 ... C24 Second-level lookahead C16 15-815-8 Block G P $15-8 X7-07-0 Block Go Po $7-0

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