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