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Optimum Logic Modules
January 1972 (vol. 21 no. 1)
pp. 90-96
G.I. Opsahl, NORAND Corporation
The results of an exhaustive analysis undertaken to determine the optimum three-input logic modules are examined. The optimum logic module is restricted to realize all three-variable functions in two logic levels, with one polarity available for each input variable. Only one three-input logic module satsifies these restrictions for three variables. All realizations with the fewest logic modules and minimum number of interconnections for all three-variable functions with this logic mocOule are included in a catalog. An algorithm is presented which extends the three properties of this three-input logic module. The four-input logic module from the algorithm has been verified to realize all four-variable functions in two logic levels.
Index Terms:
Asymmetric, catalog of minimum realizations, completeness, equivalent dual, optimum logic module, two-level completeness, 2CD9 logic module, 2D logic module.
Citation:
G.I. Opsahl, "Optimum Logic Modules," IEEE Transactions on Computers, vol. 21, no. 1, pp. 90-96, Jan. 1972, doi:10.1109/T-C.1972.223436
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