MEMRISTOR

Enroll no = 120800107024

Roll no = 12CE024

Name = SACHIN R. BHOI

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SEM-5 (CE1)

What is memristor

Memristor means Memory Resistor

Memory Resistor+

Memristor is the “4th fundamental circuit element”

The Symbol of The Symbol of Memristor Memristor

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Definition of Memristor

• 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

• Unit - ohm (Ω).

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of

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The Basic principle of the memristor was first published by Leon Chua in 1971.

When he was a rising professor atThe University of CaliforniaThe University of California Berkeley.

“Memristor-the Missing Circuit Element”LEON.O.CHUA

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In may of 2008, Scientists working under the leadership of

R .R . Stanley WilliamsStanley Williams created the first working

Memristor atlabslabs.

Which was created out of TiO2 and TiO 2 –

x

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40×40 crossbar →

• It’s a concentration of Memory resistors whereSwitching lines are perpendicular with the

Memristor cells at the crossings.

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How Memristor Work?

•“Like the transistor, the memristor is a 3-terminal element.

•The conductance between two of the terminals is controlled by the time integral of the current in the third, rather than its instantaneous value as in the transistor.”

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PT PTTiOv(2-x)TiO2

3 nm

2 nm

OxidizedReduced

(-)ve (+)ve

Applied voltage makes the oxygen vacancies (+ve) to shift towards the (–ve) voltage.

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Memristor AnalogyMemristor Analogy

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Advantages of Memristor

•Memristor Can remember how much current has gone through it.

•It will save its electronic state when power is OFF.

•Memristors will be Cheaper, Faster and be able to hold more memory density than flash memory.

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Future of Memristor

Nonvolatile memoriesNonvolatile memories• Memristor Can remember how much current

has gone through it.

Booting free computersBooting free computers

• Software will not need to load each timeMake computers more affordable and more

powerful.

Memristor allows greater speed and density (9 nm in size). GALACA researches have prototyped memory using memristors that fit 100 gigabytes on one square centimeter.

• Solid-State Memristors can be combined into devices called crossbar latches which is the main feature of current transistors.

• We can make a new type of transistor usingMemristor which is 10 times smaller than current transistor.

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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.

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To conclude

Memristor is going to revolutionaries the 21st century as the transistor in the 20th century.

But Memristor will have to wait a few years for an application like transistor which had to wait almost after it’s invention.

Finally as Leon O Chua mentioned

“It’s time to rewrite all the EE textbooks.”

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Any queriesAny queries ......