A decoder is a combinational circuit that connects the binary information from ‘n’

input lines to a maximum of 2^n

unique output lines. Decoder is also called a min-term

generator/max-term generator. A min-term generator is constructed using AND and

NOT gates. The appropriate output is indicated by logic 1 (positive logic). Max-term

generator is constructed using NAND gates. The appropriate output is indicated by logic

0 (Negative logic).