Design And Simulation Analysis Of Memristor-based Adder

As the size of transistor is keeping decreasing, the size and calculated performance of integrated circuit is close to the limit and the development of CMOS technology faces great challenges. As a new nano-electronic device, memristor, which not only can make up a crossbar but also provides memory characteristics, is considered a promising competitor to replace CMOS. Logic operation and arithmetic operation are the basic operation functions of traditional computer, while arithmetic operation is based on addition. So, the design of memristor-based n-bits adder makes sense to both theory and reality.Revolving around memristor-based adder, our research moves towards increasing sophistication. Firstly, a detailed introduction on the basic theory, electrical characteristics, working principle of the memristor and its models is made and the analysis results are validated by simulation results. On the basis of switch effect and resistive performance of memristor, memristor-based AND gate, OR gate and NOT gate are introduced, a kind of memristor-based XOR gate and X NOR gate is developed. Then based on these logic gate circuits, a new circuit design of half adder and full adder is introduced according to the analysis of traditional adder and the design is validated by simulation results. At last, by studying traditional ways of carry process in serial-carry adder and parallel-carry adder, an improved n-bits adder is put forward based on serial-carry adder, which consists of memristors and switches. By comparing the speed and consumable in different n-bits adders, the conclusion is drew that the proposed adder has benefits of simper architecture, higher speed, lower power consumption, high fault tolerance and high stability.This thesis provides a memristor-based n-bits adder as a solution to the future alternative Computation-In-Memory architecture as well as new ideas in memristor-based arithmetic operation.