MEMRISTOR PRESENTED BY Varun Thomas S7 R No 39.

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Presentation transcript:

MEMRISTOR PRESENTED BY Varun Thomas S7 R No 39

CONTENT Introduction Basic memristor model Analogy Types of memristors Working of memristor Memristor as storage device Advantages/Disadvantages Application Conclusion Reference

Courtesy : memristor.org/technical-details INTRODUCTION A fundamental circuit A two terminal device Relates to charge and flux Courtesy : memristor.org/technical-details

BASIC MEMRISTOR MODEL Doped: region of low resistance Undoped: region of high resistance R off : Resistance when w/d=0 R on: Resistance when w/d=1 Courtesy : acm.org/memristor.html

ANALOGY Courtesy :www.memristor.org/memory-resistor/education

TYPES OF MEMRISTOR Spintronic Memristor Titanium dioxide Memristor

WORKING OF MEMRISTOR Spintronic Memristor Spin of electrons Magnetism Magneto resistance principal Electrons flow alters the magnetization state

WORKING OF MEMRISTOR Titanium dioxide Memristor Two thin layer sandwich First layer oxygen deficient Oxygen vacancies control resistance

Titanium Dioxide Memristor WORKING OF MEMRISTOR Titanium Dioxide Memristor Courtesy :www.memristor.org/memory-resistor/education

MEMRISTOR FOR STORAGE Nonvolatile Energy required during switching Memristor as switches in crossbar architecture

CROSSBAR ARCHITECTURE Connected mesh of perpendicular wires Crossing wires connected by switch Switch closed applying positive voltage Switch opened by reversed voltage

CROSSBAR ARCHITECTURE Courtesy by memristor.org/memory-resistor/education

MEMORY MANAGEMENT Read operation Write operation Addressing

READ OPERATION Voltage below threshold voltage applied If ON conducts If OFF doesn't conduct Courtesy :acm.org/memristor.html

WRITE OPERATION A voltage above threshold voltage applied Stage inverted by opposite polarity Voltage for duration tw applied Courtesy :acm.org/memristor.html

ADDRESSING Lines arranged in columns and rows Cell addressed by row and column Courtesy :www.memristor.org/memory-resistor/education

ADVANTAGES Eliminates delay Speed inversely proportional to size Large density 1terabit/cm2 Analog data storage possible

DISADVANTAGES Dissipates heat No design standards Needs defect engineering

APPLICATION Faster SSD’s Brain like system Smaller hardware devices Replace DRAM

CONCLUSION Latest technology High speed memory devices Low power requirements

REFERENCE D. B. Strukov, G. S. Snider, D. R. Stewart, and R. S.Williams, “The missing memristor found,” Nature 453, 80–83 (2008).www.nature.org/ missing-memristor-found L. O. Chua, “Memristor—The missing circuit element,”IEEE Trans. Circuit Theory, vol. CT18,pp.507519,Sept.1971.www.spectrum.ieee/ semiconductors/processors/memristor http://www.memristor.org/memory-resistor

THANK YOU

QUESTIONS???