Memristor
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Transcript of Memristor
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MEMRISTOR
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Presented By:Amit kumarReg. No- 100101ECR019
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MEMRISTOR
Memristor
Memory Resistor+
• Memristor can be defined as a two terminal device which shows the relation between magnetic flux and charge.
• Fourth fundamental circuit element.
MEMRISTOR SYMBOL
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• A Memristor is a semiconductor whose resistance varies as a function of flux and charge. This allows it to remember what has passed through the circuit.
• Characterized by Memristance
V(t) = M(q(t))*I(t)
M(q(t)) =V ( t )I ( t )
• Memristance is simply charge-dependent resistance
• Unit - ohm (Ω)
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The Missing Circuit Element
Voltage (V)
Current(i)
Charge (q)
Flux (Φ)
Φ = Li Inductors
??
v=dΦ/dt i=dq/dt
Resistors v=Ri
q=CvCapacitors
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Memristor
MemristorsΦ=Mq
Voltage (V)
Current(i)
Charge (q)
Flux (Φ)
Φ = Li Inductors
v=dΦ/dt i=dq/dt
Resistors v=Ri
q=CvCapacitors
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Construction of TiO2 memristor
TiO2-x TiO2Pt
Equivalent circuit
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Working
Tio2-x
Tio2
Ron
Roff
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Memristor as a memory unit
1 cm3 memristor = 1 terabit
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Analogy Of Memristor
A RESISTOR WITH MEMORY BEHAVES LIKE A PIPE
• The diameter of pipe remains same when the current is switched off, until it is switched on again.
• The pipe, when the current is switched on again, remembers what current has flowed through it.
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What Sets Memristor Apart ??
• Conventional devices use only 0 and 1 but Memristor can use any value between 0 and 1.
• Faster than Flash memory.– Allow digital cameras to take pictures with no delay in
between.
• Innovating nanotechnology due to the fact that it performs better the smaller it becomes.
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• Remember (or recall) the last resistance it had, before being shut off.
• By changing the speed and strength of the current, it is possible to change the behavior of the device.
• A fast and hard current causes it to act as a digital device.
• A soft and slow current causes it to act as an analog device.
Property Of Memristor
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Benefits Of Memristor Technology
• Would allow for a quicker boot up since information is not lost when the device is turned off.
• Creating a Computer that never has to boot up.• Density allows for more information to be stored.• Has the capacity to remember the charge that flows
through it at a given point of time.• No more hard drive and RAM, just Memristor.• Very high storage and speed.
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Future Technological Significance
• Pattern recognition.
• New forms signal processing and control systems.
• Memristors can be used to do digital logic using implication instead of NAND.
• Could lead to replacement of the transistor
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Major Challenges
• No design standards (rules)
• Needs more defect engineering
• Dissipates heat when written to or read
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Conclusion
It is sure that Memristor is going to revolute 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”
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References How We Found the Missing Memristor by Stanley Williams, IEEE
Spectrum December 2008. L.O, Chua, Memristor-missing circuit clement, IEEE Tans . Circuit
Theory, Vol. 18, 1971, pp. 507-519. Memristor and Memristive Systems Symposium, University of California,
Berkeley, November 21,2008. Stateful Implication Logic with Memristors by Eero Lehtonen, Mika Laiho
2009 IEEE/ACM International Symposium on Nanoscale Architectures
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THANK YOU !!