5. Combinational Logic Circuit Based on BZ Reaction

As a basic unit of large scale integration, combinational logic circuit is very important in the development of digital computer. Chemical computation should have the ability to replicate the basic function of combinational logic circuit in BZ medium, in order to realize chemical computer. In this chapter, we design and implement different types of combinational logic circuits from two perspectives. On one hand, based on the basic chemical processors and logic gates, the cascade method is applied to achieve the functions of multi-bit combinational logic by using low-bit logic circuits. On the other hand, a universal method is put forward to construct combinational logic circuits according to their sum-of-products expressions. Simulation results demonstrate the effectiveness of the two construction methods, as well as all the combinational logical circuits designed in this chapter. We believe that the realization of combinational logical circuits will be helpful to fulfil other logic and arithmetic functions, and ultimately can bring great potential applications for the implementation of chemical computer and other intelligent systems.