Memristor, 4th basic circuit element. RLC + M

Sounds like it should have been a March 32nd press release, =

but apparently not.

__________

    "HP today announced that researchers from HP Labs have =

proven the existence of what had previously been only =

theorized as the fourth fundamental circuit element in =

electrical engineering. This scientific advancement could =

make it possible to develop computer systems that have =

memories that do not forget, do not need to be booted up, =

consume far less power and associate information in a manner =

similar to that of the human brain. In a paper published in =

today=92s edition of Nature, four researchers at HP Labs=92 =

Information and Quantum Systems Lab, led by R. Stanley =

Williams, presented the mathematical model and a physical =

example of a =93memristor=94 =96 a blend of =93memory resistor=94 =96 =

which has the unique property of retaining a history of the =

information it has acquired.  ... Chua argued that the =

memristor was the fourth fundamental circuit element, along =

with the resistor, capacitor and inductor, and that it had =

properties that could not be duplicated by any combination =

of the other three elements.
Building on their groundbreaking research in =

nanoelectronics, Williams and team are the first to prove =

the existence of the memristor.

        http://www.physorg.com/news128786808.html
        http://blog.wired.com/gadgets/2008/04/scientists-prov.html

        http://www.hpl.hp.com/news/2008/apr-jun/memristor.html

        http://www.nature.com/news/2008/080430/full/news.2008.789.html

___________________

Ref:: Ken Mardle
___________________

Memristors -- the fourth passive component type after =

resistors, capacitors and inductors -- were postulated in a =

seminal 1971 paper in the IEEE Transactions on Circuit =

Theory by professor Leon Chua at the University of =

California (Berkeley), but their first realization was just =

announced today by HP. According to Williams and Chua, now =

virtually every electronics textbook will have to be revised =

to include the memristor and the new paradigm it represents =

for electronic circuit theory.

        http://www.informationweek.com/news/hardware/processors/showArticle=
.jhtml?articleID=3D207403582
________________

The memristor is defined as an element in which the electric =

flux (f) and the electric charge (q) are related by a =

time-independent function.[specify] It behaves like a =

non-linear resistor with memory, and was predicted and =

described by Leon Chua, a faculty member of the University =

of California at Berkeley, in 1971 in a paper that appeared =

in IEEE Transactions on Circuit Theory

        http://en.wikipedia.org/wiki/Memristor

_________________

A new two-terminal circuit element-called the =

memristorcharacterized by a relationship between the =

chargeq(t)equiv int_{-infty}^{t} i(tau) d tauand the =

flux-linkagevarphi(t)equiv int_{- infty}^{t} v(tau) d tauis =

introduced as the fourth basic circuit element. An =

electromagnetic field interpretation of this relationship in =

terms of a quasi-static expansion of Maxwell's equations is =

presented. Many circuit-theoretic properties of memistors =

are derived. It is shown that this element exhibits some =

peculiar behavior different from that exhibited by =

resistors, inductors, or capacitors. These properties lead =

to a number of unique applications which cannot be realized =

withRLCnetworks alone. Although a physical memristor device =

without internal power supply has not yet been discovered, =

operational laboratory models have been built with the help =

of active circuits. Experimental results are presented to =

demonstrate the properties and potential applications of =

memristors.

        http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=3D1083337

        http://ieeexplore.ieee.org/Xplore/login.jsp?url=3D/iel5/8147/23413/=
01083337.pdf?tp=3D&isnumber=3D&arnumber=3D1083337


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