Design of totally self-checking embedded two-rail code checkers

F Özgüner - Electronics letters, 1991 - IET
Electronics letters, 1991IET
This Letter addresses the problem of designing totally self-checking checkers for checking m
two-rail signal pairs, when the checker receives a subset of all possible input codewords,
under normal operation. There are cases when a two-rail checker tree, which will be tested
by th e inputs received under normal operation, cannot be found. However, it is shown that
two-rail checker network structures other than trees will also be totally self-checking (TSC)
and code-disjoint. A method for designing TSC two-rail checkers for a given set of input …
This Letter addresses the problem of designing totally self-checking checkers for checking m two-rail signal pairs, when the checker receives a subset of all possible input codewords, under normal operation. There are cases when a two-rail checker tree, which will be tested by th e inputs received under normal operation, cannot be found. However, it is shown that two-rail checker network structures other than trees will also be totally self-checking (TSC) and code-disjoint. A method for designing TSC two-rail checkers for a given set of input codewords is presented.
IET