Research Of Logic-in-memory Based On A-Si Memristor And MIGs

Today,with the explosive growth of information,it is difficult to improve the computational performance by scaling of device and the bottleneck of Von Neumann architecture is becoming increasingly prominent.Memristor is one of the new nonvolatile storage media.With low power consumption,high speed,high integration,memristor become the key device to realize the logic-in-memory function.In this paper,the electrical measurement and analysis of the amorphous silicon memristor that is suitable for two valued logic calculation are carried out,and an amorphous silicon memristor model for circuit simulation is established by combining the electrochemical conduction mechanism of memristor.Using the Majority-Invertor-Graphs(MIGs)logic architecture,the basic computing unit based on memristor is designed.The basic computing unit based on memristor is designed.The basic computing unit can not only realize the complete MIGs logic calculation,but also compatible with the memory structure of memristor,crossbar,so as to realize the logic-in-memory.Finally,the basic design method of cascade calculation unit,using amorphous silicon for the early design of the memristor circuit model,simulation of a full adder operation in crossbar array,and the operation steps and to participate in the operation of the memristor number less,at the advanced level in the same study.The main work of this paper is as follows:In chapter ?,the physical model and MIGs calculation method are reviewed.Firstly,the macro physical model and random physical model of memristor are reviewed.Secondly,the principle of memristor state logic calculation and the MIGs calculation method are introduced.In chapter ?,the amorphous silicon memristor is measured and analyzed,and the SPICE model of the device is established.Firstly,the measurement of electrical characteristics of memristor and analysis of the impact of device thickness,temperature,operating voltage on the device characteristics are carried out.Secondly,with the memristor electrochemical conductive mechanism and the electrical characteristics of amorphous silicon data measured by memristor,a macroscopic model of memristor is established.Compared with measured data,it proves that the non-crystal silicon circuit characteristics of memristor simulation of this model well.In chapter ?,the implementation of memristor in computation,storage and fusion is studied.A memristor computing unit based on MIGs logic framework is designed,and complex logic is realized by cascade of computing units.The first design based on amorphous silicon memristor(MAJ)circuit structure and calculation of the sequence with INV logic,through the simulation of SPICE(MAJ)corresponding to the input and output of different INV logic,it is proved that the design scheme can realize the amorphous silicon memory two basic logic unit resistor cross array.Secondly,by using the calculation unit of the memristor a full adder function was completed.The simulation results show that the scheme is feasible and has excellent performance.