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+Repeat Problem by using three-input, one-output circuits, one for each of the four bits. The four circuits are connected together in cascade by carry-like signals. One of the inputs to each cell is a carry input, and the single output is a carry output.
Problem
Design a combinational circuit that compares two 4-bit unsigned numbers A and B to see whether B is greater than A. The circuit has one output X, so that X = 1 if A < B and X = 0 if A ≤ B.
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