Embedded two-rail checkers with on-line testing ability

Abstract

This paper addresses the problem of the design of embedded two-rail checkers. In particular a simple additional circuit is proposed which can be used to make a two-rail checker receive all the codewords of the two-rail code, independently of which and how many codewords are produced by its driving functional block or checkers. The proposed circuit features a high online self-testing ability with respect to possible internal faults and a compact structure.