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SYNTHESIS OF SELF-CHECKING BUILT-IN CONTROL CIRCUITS BASED ON LOGICAL COMPLEMENT TO THE EQUILIBRIUM TWO-OUT-OF-FIVE CODE

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A method for organizing self-checking built-in control circuits for automation and computing devices, based on the method of logical complement to the equilibrium two-out-of-five code, is presented. A procedure for completing the definition of the control functions of a logical complement is proposed, which makes it possible to provide the formation of complete tests for the transformation elements and the tester in the built-in control circuit; this ensures the most even distribution of working combinations between all test combinations for all elements of the control scheme. The minimum number of working combinations required for a complete check of the elements of the built-in control circuit is six, which is 18,75 % of the total number of working combinations. The proposed method for obtaining the values of the control functions of the complement is based on the functional dependence of the control and operating functions of the diagnostic object, which ensures the simplicity of its automation and integration into the means of computer-aided design of digital computing systems.

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