Methods of organization of totally self-checking concurrent error detection system on the basis of constant-weight «1-out-of-3»-code

The article provides the method of concurrent error detection (CED) system organisation, based on the constant-weight 1/3-code, with outputs of testing logic circuit combined into groups by 3 outputs. The authors provide the calculation formulas of check functions of complements, that allow not only to form the set of testing combinations for «1-out-of-3»-code (1/3-code) checker, but also to form the set of testing combinations for all modulo-two adders in the structure of CED system. The article also gives the conditions of providing the total self-checking of the structure, as well as recommendations for using this method with the number of check circuit outputs m>3.