4-bit comparator

Design a circuit that compares two 4-bit numbers represented in binary
code and indicates whether the first is greater than, equal to or
smaller than the second.

Specification

    module cmp4(a, b, eq, gt, lt);
        input [3:0] a, b;
        output eq, gt, lt;

Hint

Design a 1-bit comparator that receives the result of the comparison of
the least-significant bits. Use four instances of this circuit.

Input

- a and b are the two 4-bit input numbers.

Output

- eq indicates that a=b.

- gt indicates that a>b.

- lt indicates that a<b.

Problem information

Author: Jordi Cortadella

Generation: 2026-02-03T12:12:31.124Z

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