MEMRISTORMEMRISTOR

SREEJITH A G

S7 EB # 57

What is Memristor

Mem story

Inside Memristors

Why Memristor

Big Guns involved

FUTURE

To conclude

Ref:

What is memristor ?

What is memristor ?

Memristor is really a MEMory ResISTOR

Memristor can be defined as a two

terminal device which shows the

relation between magnetic flux

and charge

memristor symbol

Memristor AnalogyMemristor Analogy

The term Memristor was first proposed by Leon Chaua in 1971 when he was a rising professor atThe University of CaliforniaThe University of California Berkeley

LEON.O.CHUA

THE FORTH FUNDAMENTAL DEVICE

Pinched Loop Curve

MEMISTOR

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).

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).

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

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.

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.

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

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

SEPTEMBER

Memristive behavior of magnetic tunnel junctions is reported by researchers from the Bielefeld University, Germany. 

Types of memristor’sTypes of memristor’s

Memistor Unrecognized First Memristor

Hp lab’s TiO2 switching memristor

Spintronic Memristor

NIST’s flexible memristor

MemistorIn 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.

In may of 2008, 37 year old Waiting for Leon Chua blossomed, when scientists under the leadership of R .R . Stanley WilliamsStanley Williams created the first memristor at

HP labsHP labs The Memristor was created out

of TiO2 and TiO 2 -x

How H P’s Memristor works

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.

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

The three methods

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’smemristor but in a much simpler way

Other types of Memristor to be developed

Magneto Resistive memory effectMagneto Resistive memory effect

Electrostatic effectElectrostatic effect

Valency change effectValency change effect

Thermo chemical effectThermo chemical effect

Phase change memoryPhase change memory

Nano mechanical memoryNano mechanical memory

Ferroelectric/ MF TunnelingFerroelectric/ MF Tunneling

Nonvolatile memoriesNonvolatile memories

Booting free computersBooting free computers

Logic/computingLogic/computing

Artificial BrainArtificial Brain

Physarum polycephalumPhysarum polycephalum

Big Guns involved

Future

Memcapacitor Memcapacitor and

MeminductorMeminductor

To conclude

It is sure that Memristor is going to revolutionaries the 21st century as radically as the transistor in the 20th 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”

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)

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)

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

VIDEO LINKS

Memristor and Memristive Systems Symposium (4 parts) total of 5 hours

6-Minute Memristor Guide

Memristors The Missing Link(3:38)

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