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PRESENTED BY

PAWAN SRIVASTAVA

ROLL NO.-0608231065

GUIDED BY

PRADEEP GUPTA

LECTURER

129 SEPT 2009


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INTRODUCTION

HISTORY

BASIC CIRUIT ELEMENTS

MANUFACTURING

TECHNIQUES FEATURES

IMPLEMENTATION

FUTURE ASPECTS

CONCLUSION

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SYMBOL OF

MEMRISTOR

Memristor is contraction of memory resistor.

It stores data by maintaining a particular

physical state, or orientation of atoms.

Resistance depends on magnitude and

polarity of the voltage applied.

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It is the fourth passive element.

A type of electrical circuit connects capacitor, resistor, and

inductor.

Information storage device.

It remembers how much current has passed through it.

By changing the amount of current, resistance can be

changed.

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A complete quartet


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1. q idt = 2. = dt

3. 4.

5. 6.

/ d R dv i= d / dvC q=

d / dL i= d / dM q=

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Memristor = memory resistor

There are four fundamental circuit variables: electric

current, voltage, charge, and magnetic flux. For these

variables, we have resistors to relate current to voltage,

capacitors to relate voltage to charge, and inductors to

relate current to magnetic flux.

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( ) md

M q dq

=

/ ( )( ( ))

/ ( )

md dt v tM q t

dq dt I t

= =

Each memristor is characterized by its memristance function

describing the charge-dependent rate of change of flux with

charge

From faraday's law of induction

If M(q(t)) is a constant, then we obtain OHM'S LAW

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R(t) = V(t)/ I(t).

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Solving for voltage as a function of time

( ) ( ( )) ( )V t M q t I t =

2( ) ( ) ( ) ( ) ( ( ))P t V t I t I t M q t = =

The power consumption characteristic

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As with a pipe example

A resistor is like a pipe whose diameter is constant and

limits the water flow through it accordingly.

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A memristor is like a pipe which has theproperty that if water flows through it in one

direction the diameter shrinks and if it flows

in the other direction it expands and once

water stops flowing through it, it remains thesame size until water starts flowing again.

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The techniques used by HP:

NANOIMPRINT LITHOGRAPHY

Stamp like structure to transfer a pattern on substrate .

NANOSCALE FABRICATION

Self-assembly technique.

A mixture of polymers can form periodic structures on

a surface based on process of energy

minimalization.

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Si WAFER

Etched isolation region

between wiring stacks

N-doped

polysilicon layer

P-doped

polysilicon layer

Metal layer 1

(input wiring)

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Memristor fabrication


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Dielectric filter SiO2

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Memristor fabrication


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Remembers and associates series of events in a mannersimilar to the way human brain recognizes patterns.

Improved facial or biometric recognition

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Combination of transistors and memristors

Faster, Smaller ,energy efficient alternative to FLASH

STORAGE

More logic gates per unit area of chip

Less heat generation17

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SHUTDOWN

Programs ended

Power disconnectedSHUTDOWN with MEMRISTOR

Programs suspended

Power disconnected

RESUME YOUR WORK AFTER

SHUTDOWN INSTANTLY

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Spintronics is the use of electron spin to store information.

Its all about the spin and charge of electron communicating

with each other.

Electrons can spin in two ways up or down

* each spin has different energy

* magnetic field affects the spins

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With the help of

memristor computer will

be processing information

just like the human brain.

It will speed up the

artificial intelligence

process

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Concept of Memristor by Leon Chua that was made practical

by Stan Williams (HP Labs) is a breakthrough in the field of

electronics

The current research work in HP labs shows that

It will enable very small,i.e. nanoscale devices to be made

without generating all the excess heat that scaling down

transistors is causing today and thus makes chips cheaper

It will eliminate RAM from computers

Eliminate rebooting function from computers

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