On Sun, 18 Nov 2012 15:16:14 -0600, flipper wrote:

On Sat, 17 Nov 2012 20:37:27 -0500, "P E Schoen"
wrote:

"flipper" wrote in message
. ..

The 'elements' fit in the formed quadrants. Going clockwise you
have in the lower left an inductor. Upper left is the resistor and
upper right is the capacitor. The lower right is either 'missing'
or a 'memsistor'.

(view fixed font)

voltage
^
resistor | capacitor
|
current ---------+------------ charge
|
inductor | ?????
v
flux

It’s a "flux capacitor"!
http://en.wikipedia.org/wiki/DeLorean_time_machine

It might also be modeled by a battery or a motor. Instead of *dissipating*
power as voltage and current (resistor), it *stores* power in the form of
flux and charge, either by chemical reaction or by rotational inertia.

Paul

The units for a memristor is said to be Ohms. It dissipates just like
a resistor. This has been used to argue it's not a new fundamental
device since, it is claimed, a new fundamental device would require a
new unit of measure. I'm not saying that's 'true', just that it's an
argument made. Note, however, that they're both a ratio of (in
generalized terms) 'quantity vs potential' with the difference being
one is the differential of the other. e.g. dq-idt. It might be better
to call the memristor unit Rt, or OhmT, to accommodate the 'memory'
function.

Or, put another way, it strikes me that saying 'ohms' for a memristor
is akin to noting the volt and current of an inductor or capacitor at
a specific moment in time. It's valid for that moment but is different
at others and the same goes for the memristor's 'Ohms'. It changes
over time, depending on flux and charge, so Ohms is an insufficient
measure of it's overall, time variant, characteristic.

A battery is not a passive device and a motor is not fundamental as it
can be modeled by fundamental devices.

Someone mentioned the diagonal. Yes, the inductor-capacitor diagonal
are energy storage elements. The resistor-memristor diagonal are
dissipative elements.

From considerable searching I conclude that the ReRAM is something
your door-to-door sweeper salesman might be hawking. Lots of claims.
Little do. Those who _were_ going to do non-volatile RAM with it are
"delaying" entry into the market for several years.

Even ran across a thesis and several papers where the "demonstrated"
Spice model had dangling nodes ;-)

...Jim Thompson
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