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HP discovers Memristor, a new circuit element that could enable cell phones that go on weeks without needing a charge and PCs that boot up instantly.Top Story: HP Discovers Circuitry Memory for Cell Phones, PCs

HP discovers Memristor, a new circuit element that could enable cell phones that go on weeks without needing a charge and PCs that boot up instantly.

The memristor built by HP Labs researchers is made with a layer of titanium dioxide sandwiched between two metal electrodes. The researchers discovered that the amount of resistance it exerts depends on how much electric charge had previously passed through it. That characteristic gives the memristor an innate ability to remember the amount of charge that has flowed through it long after the power to it is turned off. That means the circuit itself can be built with a memory function baked in.