Design Of Flip-flops Based On Memristor And Its Application Circuits

With the size of the semiconductor transistor continues to decrease and close to the theoretical limit,the development of integrated circuits has been greatly constrained.As the fourth fundamental circuit element in parallel with resistor,inductor and capacitor,memristor has the favorable performance merits of non-volatility,dynamic resistance switching characteristic,high-density,low energy dissipation and CMOS compatibility,which is an ideal component for constructing digital integrated circuits and is expected to bring new breakthroughs to the development of electronic industry.Firstly,the concept,characteristics,development and applications of memristor are introduced and summarized in this thesis.In view of some problems existing in traditional flip-flop circuits,such as the loss of stored data when power failure and the complexity of circuits,novel flip-flop circuits based on threshold memristor are proposed,including SR flip-flop,D flip-flop,T/T' flip-flop and JK flip-flop,which not only realize the trigger functions,but also simplify the circuit structures.Meanwhile,the non-volatility of memristor makes it possible for the flip-flops to maintain the data when power is off.This thesis also realizes two kinds of typical sequential logic circuits through the combination of the memristor-based flip-flops,namely a variety of different types of counters and registers,such as asynchronous/synchronous binary counter,asynchronous five binary counter,basic register and shift register.The correctness of the design circuits is verified by HSpice simulation results.The proposed circuits will provide experimental references for the development of digital circuit structures based on the feasibility of tight integration of memristors with CMOS circuitry.