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Let there be Memristors
Let there be Memristors
Howdy!
My imagination has always had a big appetite for new technology. Novel discoveries, fresh inventions and never-before-seen stuff that may have a place in my future always leave me thinking (sometimes daydreaming), asking myself questions such as "what will it be like when this hits the market?" or "if I had that in my hands and wanted to get creative, what could I build with it?".
Why am I saying all this? Well, just this week I came across the most jaw-dropping tech-feast my imagination has had since qubits: the memristor .
Truth be told, I had heard about memristors a long time ago, but they weren't real back then. I now found out that, thanks to Hewlett-Packard, they are, and very much so .
What exactly is a Memristor?Exactly? Oh man, you got me there. The most I can offer is this: a memristor is an mutable resistor, one that becomes less resistive as current passes through it in one direction, and more resistive when it flows in the opposite direction. Nothing too fancy there, right? Well, here comes the amazing part, the mem- part: if the current is cut off, the memristor retains the resistivity it last had. Indefinitely.
Still don't see it? Here goes then: thanks to this property, the memristor could become the smallest, fastest, most energy-efficient memory unit we've seen yet; and unlike today's fast memories, it's non-volatile. The speed of DRAM, the persistence of hard-disks, a lower energy consumption and much, much smaller in size.
Let's go over that again. It's fast, so it could replace DRAM. It's non-volatile, so it could replace hard disks. It consumes less power than both, and occupies less space than either, so it could replace flash drives. Yes, indeed: the memristor could become the universal memory.
Sounds cool, but let me see the numbersOne number should be enough. Hewlett-Packard reckons a competing portable memory device with memristor technology can be built by 2013, with a capacity of 20GB/cm². That's around twice as much as flash drives can manage, and yes, I said 2013: it's right around the corner.
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