Abstract: The principles and possibilities of design of fully quaternary multiple valued combinational logic systems and circuits are described and proposed in the paper. Different ways of design of fully quaternary combinational logic systems and circuits are considered and described first. Then algorithm for automated computerized design of such systems and circuits is considered and proposed. The algorithm gives possibility for synthesis and optimization of quaternary logic systems and circuits. It is applied on design of CMOS quaternary multiple valued logic systems and circuits. The algorithm includes the most important aspects of design of quaternary logic circuits: logic circuit scheme synthesis and logic circuit optimization. Methods for synthesis of quaternary CMOS combinational logic circuits are proposed and described. Also, method for optimization of CMOS quaternary logic circuits, according to operation conditions and needed characteristics, is proposed and described. Design procedure is realized by personal computer using PSPICE for circuit simulation. Computer PSPICE simulation results confirming described methods and conclusions are given in the paper.
Keywords: Multiple valued logic systems and circuits, quaternary logic systems and circuits, automatization, combinational logic systems and circuits, CMOS logic circuits, circuit synthesis, circuit optimization, computer simulation.