Ny fundamental elektronikkomponent - memristoren

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Har nogen kigget på denne nye fundamentale elektronikkomponent -


2. maj 2008, Fjerde byggesten i elektronik fundet med nanoteknologi:

New Basic Element For Electronic Circuits: 'Memristor' Could Give
Computers Memories That Don't Forget:
Citat: "...
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.
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.
“To find something new and yet so fundamental in the mature field of
electrical engineering is a big surprise, and one that has significant
implications for the future of computer science,” said Williams.

April 2008, Demystifying the memristor:
Proof of fourth basic circuit element could transform computing
Citat: "... As for the human brain-like characteristics, memristor
technology could one day lead to computer systems that can remember and
associate patterns in a way similar to how people do..."

( indlægssvar sendes til nntp://dk.teknik.elektronik )



Re: Ny fundamental elektronikkomponent - memristoren
Glenn Møller-Holst skrev:
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Måske skulle vi kalde den en 'flux capacitor'? :-)

Venlig hilsen,

Villy Dalsgaard

Re: Ny fundamental elektronikkomponent - memristoren
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Hej Vidal

Bare til din orientering - man kan såvidt vides ikke anvende den til at
rejse i tiden...



Re: Ny fundamental elektronikkomponent - memristoren

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De tre andre "fundamentalkomponenter" er lineære: En fordobling af
spændingsamplituden for et harmonisk signal medfører en fordobling af
strømmens amplitude.

Men Chua komponent er ikke lineær. Derfor synes jeg ikke helt at man
kan sammenligne dem.


Re: Ny fundamental elektronikkomponent - memristoren
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Hej Niels

Fluxens afledede mht. ladningen er da umiddelbar linear ligesom
kapacitans er det for en kondensator?:




Re: Ny fundamental elektronikkomponent - memristoren
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Mon enheden for memristans kommer til at hedde Chua?



Re: Ny fundamental elektronikkomponent - memristoren
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Denne artikel er god:

Electronics: The fourth element:


Nu kommer der vel ikke nogen vittige hoveder og nævner Luc Bessons Det
femte element...:




Re: Ny fundamental elektronikkomponent - memristoren
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Citat: "...
This observation provides a wonderfully simple explanation for several
puzzling phenomena in nanoscale electronics: current–voltage anomalies
in switching; hysteretic conductance; multiple-state conductances (as
opposed to the normal instance of just two conductance states, ON and
OFF); the often mischaracterized 'negative differential resistance', in
which current decreases as voltage increases in certain nanoscale
two-terminal devices; and metal–oxide–semiconductor memory structures,
in which switching is caused by the formation and breakdown of metal
filaments owing to the movement of metal atoms under applied bias.
signal gain is not possible with a memristor

Så det hjælper åbenbart på vores forståelse af visse underlige



Re: Ny fundamental elektronikkomponent - memristoren
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signal gain is not possible with a memristor

Her menes nok type-S negativ differentiel modstand?:


Det må være dette:

Citat: "...The element named "resistor" is really a resistor while the
"negative resistor" is actually a voltage source, whose voltage is
proportional to the current passing through it..."




Re: Ny fundamental elektronikkomponent - memristoren [ og hifi-"fantaster" ]
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Mon en model, der indbefatter memristorer, kan forklare hvorfor nogle
hifi-folk kan høre forskel på forstærkere - selvom man hidtil ikke har
kunnet måle betydende forskel med traditionel

Det kunne være interessant at undersøge?

Hvad med:

*keramiske kondensatorer eller elektrolyt kontra hifi-kondensatorer?

*lysnetsledninger kontra hifi-ledninger?

*"Gode" hifi-operationsforstærkere (f.eks. NE5534A) kontra LM741...?

*Transistorer kontra fets kontra elektronrør?

September 14, 1972, Tubes Vs. Transistors
Is There An Audible Difference?
Citat: "...
Engineers and musicians have long debated the question of tube sound
versus transistor sound.
Over a period of several years we continued this rather informal
investigation of the electronic sound problem. In the past, we have
heard many widely varied theories that explain the problem, but no one,
however, could actually measure it in meaningful terms.
It is the listener's job to sort out the facts from the fiction.
Electrical engineers, especially the ones who design recording
equipment, can prove that there is no difference in tube or transistor
They do this by showing the latest specification sheets and quoting
electronic figures which are visually quite impressive. It is true,
according to the parameters being measured, that there is only a
marginal difference in the signal quality. But are there some important
parameters which are not being measured?

The Vacuum Tube & the Human Ear
By Keith Herron:
Citat: "...
To me, as an engineer, it seems inconceivable that a tube amplifier with
a big old transformer at the output could sound better than a
solid-state amplifier with no transformer.
Much of the solid-state audio gear that I have heard, particularly the
stuff that employs BJTs in the signal path, tends to sound more
aggressive and harsh though the midrange and high frequencies. The sound
stage generally has less depth, width, and height than that of its
vacuum-tube counterpart. I have encountered a few designs that are
exceptions to this and that makes me wonder if the sonic differences I
have heard have more to do with proper or improper implementation of the
various amplifying devices than with any guaranteed certain results of
their use.

The worst thing an audio engineer can do is to assume that he or she
knows much about the nature of human hearing. After all, the engineer
who designed our hearing knows a few things we never will.

Why Tubes?:
Citat: "...
Seems in 2003 vacuum tubes or electron valves are still best choice
The negative feedback help to reduce the THD on paper at the same
harming the dynamic range and adding upper level harmonics - very
unpleasant coloration of the sound.
but two or more stages feedback makes the system behave like a pound of
soft dough - you pull one end but unpredictable getting thinner on the
other end or in the middle and getting sticky. NF may create also
unpredictable intermodulation and transient distortions, which is worse
than simple reduced dynamic range. Music reproduced from such "all
stages" deep NF amp sound machined and mechanical no matter tube or
transistor /transistor is worse thou/.
Some "new" tube designs, I've only heard about may use a some sort of
magnetic field for extra regulation or "improvement"...but I haven't
seen one yet.

Citat: "...
The audible significance of measurable effects on signals is a
continuing debate among audiophiles
However, other audible differences in sound have proven difficult to
define or measure, and it is difficult to explain these sound
differences in words as the vocabulary available to describe sound is
rather limited -even though the underlying sonic effects may be real.
Audiophiles often use words like 'warm', 'liquid', 'smooth' and
'midrange magic' to describe the sound from tube amplifiers
There has been considerable debate over the characteristics of tubes
versus bipolar junction transistors. Some audiophiles have argued that
the quadratic transconductance of tubes compared with the exponential
transconductance of transistors is an important factor. This has not
been proven
Some high end tube amplifier designs also include vacuum tube rectifier
circuits instead of modern silicon diode or bridge rectifier circuits. A
cheap solid state rectifier does introduce audible noise into the
circuit.[4] Audibility of the effects is disputed by many
Audiophiles who prefer SET-amplifiers state that measured sound
performance is a poor indicator of real world sound performance and
distortion level is not the only criterion for good sound reproduction.

Consumer and Designer Prejudices in High-End Audio: A New Way to Examine
Citat: "...
It should also be noted that audio--high-end audio in
particular--appears to be the only technological discipline suffering
from the peculiar attitudinal syndrome analyzed above. You will not find
automotive engineers, for example, claiming that one brand of spark plug
(or ignition wiring or distributor) with exactly the same specifications
and measured performance as another “feels better” when driving, and
certainly not that it makes the car go faster!

We are faced with so many real problems in audio design. It is time for
the designers of audio electronics, when they are not accomplishing
anything, to recognize it and move on to the solution of those real



Re: Ny fundamental elektronikkomponent - memristoren [ og hifi-"fantaster"]
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Det er simpelthen imponerende at du kan svare dig selv 4 gange.....

  Modelbane Europas hjemmeside: http://www.modelbaneeuropa.hadsten.dk
  Modeltog, internet, gratis spambekæmpelse, elektronik og andet:
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Re: Ny fundamental elektronikkomponent - memristoren [ og hifi-"fantaster"]
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det hedder selvsving :-)

Bo //

Re: Ny fundamental elektronikkomponent - memristoren
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Den er vist ikke i handelen endnu Glenn.


Re: Ny fundamental elektronikkomponent - memristoren
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Hej Martin

Det har du nok ret i.

Men det kunne være interessant at måle, hvor meget memristans andre
spoler, modstande, kondensatorer, mosfet og transistorer har.

Da det er en fundamental komponent, har alle komponenter memristans
virkning - ligesom en kondensator har modstandsvirkning og spolevirkning
(og memristorvirkning).

Alle kredsløb skal derfor modelleres med memristorer!

Noget af det der tilskrives (hystereseagtig) ulinearitet i en transistor
kunne memristans?

Hvad med hysteresen i spoler og transformatorer med laminerede
jernkerner - er noget af det memristans? En "ren" spole har ikke



Re: Ny fundamental elektronikkomponent - memristoren [ Magnetisk boblehukommelse? ]
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Hvad med:


Har de gavn af at modelleres med memristans?



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