# Repeat Problem 3-59 by applying contraction to a 4-bit subtractor and using the borrow out as X.

## Question:

Repeat Problem 3-59 by applying contraction to a 4-bit subtractor and using the borrow out as X.

**Problem 3-59**

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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**Related Book For**

## Logic And Computer Design Fundamentals

**ISBN:** 9780133760637

5th Edition

**Authors:** M. Morris Mano, Charles Kime, Tom Martin