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MEMRISTOR

MEMRISTOR. PRESENTED BY Varun Thomas S 7 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.

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MEMRISTOR

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  1. MEMRISTOR • PRESENTED BY • Varun Thomas • S7 R • No 39

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

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

  4. 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

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

  6. TYPES OF MEMRISTOR • Spintronic Memristor • Titanium dioxide Memristor

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

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

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

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

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

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

  13. MEMORY MANAGEMENT • Read operation • Write operation • Addressing

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

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

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

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

  18. DISADVANTAGES • Dissipates heat • No design standards • Needs defect engineering

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

  20. CONCLUSION • Latest technology • High speed memory devices • Low power requirements

  21. 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

  22. THANK YOU

  23. QUESTIONS???

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