Multiple Valued Logic

Two-level logic, referred to as “binary logic,” is the primary logic coding method used in digital integrated circuits (ICs) and involves only two levels: 0 and 1. Multiple-Valued Logic (MVL) codes information in multiple levels and typically refers to systems where more than two discrete levels are used in a single conductor.

Digital systems contain internal signals which take on a finite number of values. If n is a positive integer denoting the number of discrete values which can be assumed by such signals, then the system is said to be n-valued, where n ≥ 2. Multiple-valued logic typically refers to systems where n > 2.

MVL principles and methods are general and can be used independent of the actual underlying implementation of the circuits. Several MVL applications are currently implemented in software that executes on a binary microprocessor or field.