Functionally-complete tolerant element

Singularities of saving of logic functions are considered at failures and it is shown that for saving of constants at failures and malfunctions it is necessary to use triple redundancy – majoritation. By the authors offered functionally complete tolerant (FCT) elements are analyzed which provide saving of the functional completeness at the given failure pattern. Basis element FCT+ with function 2OR-NOT on CMOS transistors saving this function at the single-valued constant failures is offered and is analyzed.