A memristor-CMOS-based general-logic circuit and its applications

Abstract

Memristors are a kind of information-storage device with resistance-switching dynamics. Due to the variable conductivity of memristive devices, their composite circuits can be used for implementation of logic operations. In this paper, a novel hybrid CMOS-memristor-based logic circuit is proposed for use in realizing four basic logic operations (AND, OR, XOR, XNOR) simultaneously within the same circuit. Compared with existing logic implementations (MAD Gates, MRL, IMPLY), the present circuit offers better performance and greater efficiency, owing to the significant reduction in the number of memristors used in the circuit and the power consumption. Thus, a new full-adder circuit and a binary-image-encryption circuit are designed. Unlike previous full-adder circuits, the proposed one has great advantages in terms of the number of circuit elements. In the proposed encryption circuit, there are two available encryption methods and the encryption key is independent of the circuit, which can improve the reliability of encryption results.