In this paper, we propose a new method of optically implementing digital logic gates capable of performing all logic operations and give the technique for construction of an array of n-bit parallel adders as a typical application circuit. These gates are implemented using a Hughes liquid crystal light valve operated in the parallel off-state configuration. It is found that all possible functions of two binary variables are realizable with these gates, some as bright-true-logic and some as dark-true-logic. Experimental results will be given using the portions of a single liquid crystal light valve demonstrating the feasibility of AND, NOR, XOR, etc. gate arrays. As an example of implementation of combinatorial circuits, a design for an array of binary adders will also be given.
In this paper we propose new methods of optically implementing digital logic gates capable of performing all combinatorial logic operations. These logic gates are implemented on a Hughes liquid crystal light valve operated in the parallel off -state.Several configurations for realization of optical gates such as AND, NOR, XOR, etc. will be considered. Experimental results will be given using the portions of a single liquid crystal light valve.
IntroductionIn this paper we present new methods of optically implementing digital logic gates capable of performing various combinatorial logic operations. These logic gates are implemented on a Hughes liquid crystal light valve (LCLV) of the same type used for making the flip -flops . Several configurations for realization of optical gates such as NOR, AND, XOR, etc. will be considered. The gates have the capability of oprating on large arrays of binary variables. Experimental results demonstrating the feasibility will be given using portions of a single LCLV.
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