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  • 1. MEMRISTOR SREEJITH A G S7 EB # 57
  • 2.
    • What is Memristor
    • Mem story
    • Inside Memristors
    • Why Memristor
    • Big Guns involved
    • FUTURE
    • To conclude
    • Ref:
  • 3. What is memristor ?
  • 4.
    • Memristor is really a MEM ory R es ISTOR
    • Memristor can be defined as a two
    • terminal device which shows the
    • relation between magnetic flux
    • and charge
    • memristor symbol
  • 5. Memristor Analogy
  • 6. The term Memristor was first proposed by Leon Chaua in 1971 when he was a rising professor at The University of California Berkeley LEON.O.CHUA
  • 7. THE FORTH FUNDAMENTAL DEVICE
  • 8. Pinched Loop Curve
  • 9.  
  • 10. M EMISTOR
    • IN 1960 Bernard Widrow develops a 3 terminal device called a " memistor " as a new fundamental circuit component forming the basis of a neural network circuit called ADALINE (ADAptive LInear NEuron).
  • 11.  
  • 12. 1960:
    • Bernard Widrow develops a 3-terminal device called a " memistor " as a new fundamental circuit component forming the basis of a neural network circuit called ADALINE (ADAptive LInear NEuron).
  • 13. 1971 :
    • Lion chaua postulates a new two terminal circuit element characterised by flux charge relationship in the article
    • "Memristor-the Missing Circuit Element" published in IEEE Transactions on Circuit Theory
    • 1972:
    • Leon Chua and his student Sung Mo Kang publish a paper entitled "Memristive Devices and Systems" in the Proceedings of the IEEE generalizing the theory of memristors and memristive systems
  • 14. 1998:
    • Bhagwat Swaroop, William West and others publish a paper entitled Programmable Current Mode Hebbian Learning Neural Network Using Programmable Metallization Cell"
    • in the Proceedings of the IEEE International Symposium on Circuits and Systems demonstrating that the complexity of an artificial synapse can be minimized by using an ionic programmable resistance device.
  • 15. 2008:
    • MAY
    • Dmitri Strukov, Gregory Snider, Duncan Stewart, and Stan Williams, of HP Labs, publish an article in Nature
    • "The missing memristor found"
    • identifying a link between the 2-terminal resistance switching behavior found in nano scale systems and Leon Chua's memristor.
  • 16. JULY
    • Victor Erokhin and M.P. Fontana claim to have developed a polymeric memristor before the titanium dioxide memristor of Stan Williams group in the article "Electrochemically controlled polymeric device: a memristor (and more) found two years ago."
    • SEPTEMBER
    • Blaise Mouttet, a graduate student at George Mason University, presents a poster entitled "Proposal for Memristors in Signal Processing" at Nano-Net 2008, a nanotechnology conference in Boston
  • 17. 2009:
    • MARCH
    • XiaobinWang, Yiran Chen, Haiwen Xi, Hai Li, and Dimitar Dimitrov publishes article entitled “Spintronic Memristor Through Spin-Torque-Induced Magnetization Motion” in IEEE Electron Device Letters
    • JULY
    • NIST scientist demonstrate flexible memory which has memristor properties
  • 18. SEPTEMBER
    • Memristive behavior of magnetic tunnel junctions is reported by researchers from the Bielefeld University, Germany. 
  • 19.  
  • 20. Types of memristor’s
    • Memistor Unrecognized First Memristor
    • Hp lab’s TiO 2 switching memristor
    • Spintronic Memristor
    • NIST’s flexible memristor
  • 21. Memistor
    • In 1960 circuit element called the memistor (a resistor with memory) has been devised by B. Widrow and M. E, Hoff for the realization of automatically adapted ADALINE neurons
    • The first working memistors were made of ordinary pencil leads immersed in test tubes containing copper sulphate- sulphuric acid plating baths. These elements are small and rugged, cheap, simple, and noncritical in manufacture.
  • 22.  
  • 23. In may of 2008, 37 year old Waiting for Leon Chua blossomed, when scientists under the leadership of R . Stanley Williams created the first memristor at HP labs The Memristor was created out of TiO 2 and TiO 2 - x
  • 24. How H P’s Memristor works
  • 25.  
  • 26. DRAWBACKS
    • The models do not take into account memcapacitive effects.
    • The models are poorly formulated.
    • The models do not properly distinguish the internal and external electric field.
  • 27. Spintronic Memristor
    • Yiran Chen and Xiaobin Wang, researchers at disk-drive Manufacturer Seagate Technology described three examples of possible magnetic memristors in IEEE Electron Device Letters
    • Spintronics is at the heart of recent advances in hard-drive data density and the niche nonvolatile memory known as MRAM
  • 28. The three methods
  • 29. NIST ’s effort to built the first nonvolatile fast flexible memory for defense purpose led them to the invention of first ever flexible memristor in July of 2009 This memristor uses the same material as that of HP’s memristor but in a much simpler way
  • 30.  
  • 31. Other types of Memristor to be developed
    • Magneto Resistive memory effect
    • Electrostatic effect
    • Valency change effect
    • Thermo chemical effect
    • Phase change memory
    • Nano mechanical memory
    • Ferroelectric/ MF Tunneling
  • 32.  
  • 33. Nonvolatile memories
  • 34. Booting free computers
  • 35. Logic/computing
  • 36. Artificial Brain
  • 37. Physarum polycephalum
  • 38.  
  • 39. Big Guns involved
  • 40.  
  • 41. Future
  • 42.
    • Memcapacitor
    • and
    • Meminductor
  • 43. To conclude
    • It is sure that Memristor is going to revolutionaries the 21 st century as radically as the transistor in the 20 th century
    • But Memristor will have to wait a few years for a killer app like transistor which had to wait almost a decade after it’s invention for the killer app in the form of hearing aids
    • Finally as Leon O Chua mentioned
    • It’s time to rewrite all the EE textbooks ”
  • 44. REFERENCE
    • "Memristor—The Missing Circuit Element", IEEE Transactions on Circuit Theory by Leon O Chua (1971)
    • "Memristive Devices and Systems" in the Proceedings of the IEEE by Leon Chua and his student Sung Mo Kang (1976)
    • " The missing memristor found" Nature (may2008)
    • IEEE Spectrum - The Mysterious Memristor, by Sally Adee (may 2008)
    • IEEE Spectrum - How We Found the Missing Memristor, by R. Stanley Williams (dec 2008)
  • 45.
    • Spintronic Memristor Through Spin-Torque-Induced Magnetization Motion by XiaobinWang, Yiran Chen, Haiwen Xi, Hai Li,and Dimitar Dimitrov IEEE Electron Device Letters ,(march 2009)
    • A Flexible Solution-Processed Memristor by Nadine Gergel-Hackett, Behrang Hamadani, Barbara Dunlap, John Suehle, Curt Richter, Christina Hacker, and David Gundlach, IEEE Electron Device Letters , (july 2009)
  • 46. web links
    • en.wikipedia.org/wiki/Memristor
    • www.hpl.hp.com/news/2008/apr-jun/memristor.html
    • www.memristor.org
    • www.newscientist.com/article/mg20327151.600-memristor-minds-the-future-of-artificial-intelligence.html
    • www.youtube.com/ucberkley
    • http://blogs.howstuffworks.com/2009/07/24/
    • how-does-a-memristor-work/
    • www.spectrum.ieee.org
  • 47. VIDEO LINKS
    • Memristor and Memristive Systems Symposium (4 parts) total of 5 hours
    • 6-Minute Memristor Guide
    • Memristors The Missing Link(3:38)
  • 48. Any queries?...
  • 49.