memristor ppt
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MEMRISTOR
PRESENTED BY
Varun Thomas
S7 R
No 39
CONTENTIntroductionBasic memristor modelAnalogyTypes of memristorsWorking of memristorMemristor as storage deviceAdvantages/DisadvantagesApplicationConclusionReference
Courtesy : memristor.org/technical-details
A fundamental circuit A two terminal device Relates to charge and flux
INTRODUCTION
BASIC MEMRISTOR MODELDoped: region of low resistanceUndoped: region of high resistanceR off : Resistance when w/d=0R on: Resistance when w/d=1
Courtesy : acm.org/memristor.html
ANALOGY
Courtesy :www.memristor.org/memory-resistor/education
TYPES OF MEMRISTORSpintronic MemristorTitanium dioxide Memristor
WORKING OF MEMRISTOR
Spintronic Memristor◦Spin of electrons◦Magnetism◦Magneto resistance principal◦Electrons flow alters the magnetization state
WORKING OF MEMRISTOR
◦Two thin layer sandwich◦First layer oxygen deficient ◦Oxygen vacancies control resistance
Titanium dioxide Memristor
Titanium Dioxide Memristor
WORKING OF MEMRISTOR
Courtesy :www.memristor.org/memory-resistor/education
MEMRISTOR FOR STORAGENonvolatileEnergy required during switchingMemristor 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 sizeLarge density 1terabit/cm2
Analog data storage possible
DISADVANTAGESDissipates heat No design standardsNeeds defect engineering
APPLICATIONFaster SSD’sBrain like systemSmaller hardware devicesReplace DRAM
CONCLUSIONLatest technologyHigh speed memory devicesLow power requirements
REFERENCED. 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-foundL. O. Chua, “Memristor—The missing circuit
element,”IEEE Trans. Circuit Theory, vol. CT18,pp.507519,Sept.1971.www.spectrum.ieee/
semiconductors/processors/memristorhttp://www.memristor.org/memory-
resistor
THANK YOU
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