Study On Binary Memristor Based Memristive Ternary Digital Logic Circuits

With the advent of intelligent information age,large-scale integrated circuits have also entered a stage of rapid development,but the characteristic size of semiconductor transistors is constantly reduced,the size and performance of integrated circuits have been approaching the physical limits,making Moore's Law facing serious challenges.One of the many ideas being proposed to continue Moore's Law is to find smaller devices that could replace the traditional CMOS transistor.The memristor is a kind of non-linear circuit element with memory function.It has the characteristics of small size,simple structure,easy integration,and low power consumption,which is considered to as a strong candidate to replace the existing transistors and continue Moore's Law.The unique nature of the memristor makes it expected to play an important role in a new computer architecture that integrates logic operations and information storage.Compared with the traditional binary logic,the ternary logic has a stronger ability to carry information on a single line of the circuit,and can improve the information density and the ability of processing information of the integrated circuit.In addition,due to the nanoscale advantages of memristors,it is easier to integrate in the circuit and is compatible with traditional CMOS technology.Therefore,it is of great significance to study the memristor ternary logic in improving the information storage capacity,transmission efficiency and reducing power consumption.The main content and innovations of this paper are as follows:(1)A ternary basic logic gate circuit based on two-valued memristor is designed by Knowm memristor.Firstly,the SPICE circuit model of the Knowm memristor is established,and the validity of the circuit model is verified by LTSpice simulation.Secondly,based on the model,a complete set of ternary basic logic gate circuits are designed,including ternary AND gate,ternary OR gate and ternary NOT gate circuit.The circuit characteristics of the three basic digital logic gates are analyzed.Meanwhile,the function of the above gatesare verified by LTSpice simulation.(2)Based on the above ternary basic logic gate circuits,A series of composite logic circuits are further designed,which includes ternary NAND,NOR,XNOR,XOR gates,and maximum and minimum circuits for processing ternary data.The designed circuits are simulated and verified by LTSpice simulation,and the results are in line with experimental expectations.(3)One bit ternary encoder and ternary decoder circuit are designed,and then design a series of combinational logic circuits based on the decoder,including one bit ternary half adder,ternary full adder,ternary multiplication and ternary numerical comparator.The characteristics of each circuit are analyzed in detail,and the effectiveness of the above-mentioned combinational logic circuits is verified through LTSpice simulation.