Symbolic minimization of multilevel logic and the input encodingproblem
Malik, S.; Lavagno, L.; Brayton, R.K.; Sangiovanni-Vincentelli, A.
Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on
Volume 11, Issue 7, Jul 1992 Page(s):825 - 843
Digital Object Identifier   10.1109/43.144847
Summary:Techniques for the optimization of multilevel logic with multiple-valued input variable is presented. The motivation for this is to tackle the input encoding problem in logic synthesis, where binary codes must be found for the different values that a symbolic input variable can take. It is shown how the other multilevel optimization techniques are easily extended with multiple-valued variables. These ideas have been implemented as algorithms in the program MIS-MV. The practical issues involved in the implementation of these ideas are discussed, and results of using MIS-MV for input encoding on benchmark examples presented

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