ORGANIZATION OF CONTROL OF COMBINATIONAL CIRCUITS BASED ON THE METHOD OF LOGICAL COMPLEMENT TO EQUILIBRIUM 1-OUT-OF-4 CODE
Annotation
A variant of the development of the method of logical complement by the equilibrium code is pro-posed. A method of organization of control of combinational logic devices based on the method of logical complement to the equilibrium 1-out-of-4 code is presented, which does not require additional determination of the values of one of the working functions of the object of diagnosis. The method employs a step-by-step algorithm to determine the control functions, considering the formation of at least once all test combinations for the elements of addition modulo two in the logical complement block and the tester. Uncertainties arising in the process of obtaining the values of control functions allow optimizing the structure of the control logic block and minimizing the complexity of the final device. Complexity of technical implementation of the end device is also affected by the choice of non-convertible function and the sequence of supplementing function definition. Replacing functions in the sequence of supplementing definitions allows to choose the best way to build a control scheme by the index of structural redundancy of the end device. The disadvantage of the considered method is the necessity to ensure the appearance of the required set of test combinations at the inputs of the logic device, which can be difficult with a small number of inputs.
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