THANSAL K Y
Known Three fundamental unaggressive circuit components:
Resistor, Inductor, Capacitor.
Does a fourth fundamental element can be found?
What is a MEMRISTOR
Memristor is really a MEMory ResISTOR
Memristor can be defined as a two
fatal device which will shows the
relation among magnetic flux
Memristor and Resistor
• The way resistor has resistance, memristor features
• Same product –ohm.
• Memristance could be switched to be able to states.
• Memristor features non geradlinig v-i story.
• level of resistance depends on degree, polarity and time
• Save it is electronic condition when current is deterred.
• " Remember” simply how much current is long gone through
Physical example for a memristor
• Resistor is analogous to a water pipe of set diameter
whereby water is usually flowing
• Water(charge q), input pressure(voltage v), rate of movement of water(current i).
• Resitance depends on diameter.
• Memristor is usually analogous into a special kind of pipe that
expands or shrinks when water goes through it.
• The pipe is directive in nature.
• If water pressure is usually turned off, pipe will maintain its most current diameter, till water is usually turned back again on.
Physical analogy for a memristor
Cross sectional area
When ever water runs
in one course
Once water moves in
a fundamental component
• Can not be duplicated simply by R, C, L.
• Peculiar behaviour- carries memory space of earlier.
• Copying requires alot of transistors and capacitors.
energy in electric field
in magnetic discipline
– Shop Information
Course of development
• First forecasted by Leon Chua in 1971 when he was a rising mentor at The university or college of a bunch of states.
• His paper " Memristor-The missing circuit element”.
was released in the IEEE Transactions on circuit theory.
• 1st solid state version in 2008 with a research staff led by R. Stanley Williams of HP Labs.
• Reported in a renowned science journel, NATURE puts out " The missing memristor found”.
• Built from Titanium dioxide with cross bar structure.
Development of TiO2 memristor
Initially there are two levels, one
somewhat depleted of Oxygen atoms,
other non-depleted layer.
The depleted part has very much
lower level of resistance than the nondepleted layer.
Working of TiO2 memristor
Functioning as a switch
Off express (high resistance)
On point out (low resistance)
Positive direction-close the switch.
Negative direction-open the switch.
An atomic force microscopic lense image of an easy circuit with 17 memristors lined up within a row. Every single memristor includes a bottom line that contacts a single side of the device and a top cable that contacts the other side. The devices work as 'memory resistors', with the resistance of each device depending on the sum of demand that has shifted through every one. The wires from this image happen to be 50 nm wide, or perhaps about 150 atoms as a whole width.
• Array of perpendicular wires.
• Anywhere two perpendicular
wire connections cross, there is a switch
References: Chua (1971)
" Memristive Devices and Systems" in the
Proceedings in the IEEE by Leon Chua and his
pupil Sung Mo Kang (1976)
" The lacking
Sally Adee (may 2008)
IEEE Spectrum - How We Found the Missing
Memristor, by L. Stanley Williams (dec 2008)