The fourth electronic circuit element: The Memristor

[jrthebassguy]

http://blog.wired.com/gadgets/2008/0...ists-prov.html




*geek-gasm*

[Matt_W]

Originally Posted by jrthebassguy

http://blog.wired.com/gadgets/2008/0...ists-prov.html




*geek-gasm*

I read about that in Newscientist, it sounds like it might have some useful applications.

[Dan1099]

Neat. I wonder when we'll see applications of this sort of thing.

[theshadow2001]

Wow a whole new circuit element. Thats probably a once in a life time discovery if not even more than that.

I wonder how long before we see commercial and home use of these things.

[DayoftheGreek]

Holy awesome. I hope this will make things simpler, my EE textbooks can barely explain the circuit elements that exist now.

[Fontaine]

one step closer to destruction?

[Dbassboarder]

In Soviet Russia, computer watches porn on you...

[StanFan]

To quote Spock, "Fascinating".

[Brad Barker]

i don't understand why the authors claim that this is the fourth electronic circuit element. the memresistor is nonlinear, whereas resistors, caps, and inductors are linear. diodes and transistors are nonlinear circuit elements and are distinct from any of the aforementioned circuit elements.

i'd like to see how hp built the memresistor.


that'd be pretty cool if it turns out to be as revolutionary as the transistor. but then again, it could also lead us to the robotic singularity (or whatever it's called) even more quickly.

[username n/a]

Originally Posted by Fontaine

one step closer to destruction?

+1

Ya know if yall keep this up soon enough we gonna have robot overlords.

[theshadow2001]

Originally Posted by Brad Barker

i don't understand why the authors claim that this is the fourth electronic circuit element. the memresistor is nonlinear, whereas resistors, caps, and inductors are linear. diodes and transistors are nonlinear circuit elements and are distinct from any of the aforementioned circuit elements.

i'd like to see how hp built the memresistor.


that'd be pretty cool if it turns out to be as revolutionary as the transistor. but then again, it could also lead us to the robotic singularity (or whatever it's called) even more quickly.

Caps aren't linear they charge up on a curve. Don't know about inductors im assuming they do too in a similar manner.

[Brad Barker]

re: "fourth circuit element"

found this while searching for more info:

Figure 1 in the paper explains it. The four fundamental circuit variables are current, voltage, charge, and magnetic flux. There are six ways of choosing two of these four, which correspond to differential equations relating the variables. Two of them are "given" in that charge is the time integral of current and magnetic flux the time integral of voltage: dq = idt. dphi = vdt.

As for the others, they are components. For instance, a resistor R fits in dv = Rdi. A capacitor C fits in as dq = Cdv. An inductor as dphi = Ldi, and a memristor fills in the missing dphi = Mdq.

fiddling around, i get V=MI, where "M" is the "memresistance." looks like vanilla resistance to me.

there's definitely more to this story, especially since it seems like dq would need to be an inexact differential in order for there to be some sort of path/history dependence.

[Brad Barker]

Originally Posted by theshadow2001

Caps aren't linear they charge up on a curve. Don't know about inductors im assuming they do too in a similar manner.

capacitors are linear circuit elements. it has nothing to do with how they behave in the time domain, but how they relate voltage, current, and derivatives thereof.

for instance, capacitors obey I = C dV/dt, and inductors obey V = L dI/dt.

but diodes give roughly an exponential dependence of current on voltage. i.e., not linear.

[TheDarkReaver]

Originally Posted by Dbassboarder

In Soviet Russia, computer watches porn on you...

that was rubbish. a better one would be "in soviet russia computer uses you!"

[Fontaine]

X_C = 1(2πfC)^-1

X_L = 2πfL

Capacitor and Inductor...why? why not

[Brad Barker]

this is a pretty informative link:

http://www.freerepublic.com/focus/f-news/2009423/posts

and i definitely want to read the original paper that started all of this:

Chua, L.O.; “Memristor-the missing circuit element,” IEEE Transactions on Circuit Theory, Sept. 1971, vol. ct-18, (no. 5): 507-519.

thanks a lot, jake. now i'm probably not going to study for my solid state final.

[Dbassboarder]

Originally Posted by TheDarkReaver

that was rubbish. a better one would be "in soviet russia computer uses you!"

Well, think of it this way, what is the largest industry on the internet right now?

[MakiSupaStar]

So uh... Can one of you geeky tech types explain to me what an analog computer is?

[Ericman197]

Originally Posted by MakiSupaStar

So uh... Can one of you geeky tech types explain to me what an analog computer is?

I dunno, but it sounds outdated anyway

[Dan1099]

Originally Posted by MakiSupaStar

So uh... Can one of you geeky tech types explain to me what an analog computer is?

Think of it this way... Sex, right? There's not just "in" and "out" but all those wonderful places in between.