A new component of electronics, first proposed in 1971, has been built by researchers at Hewlett Packard. Memristors join the three existing main components of a circuit – capacitors, resistors and inductors. The main feature of a memristor is its ability to ‘remember’ what charge it had when power runs through it.
Today, most PCs use dynamic random access memory (DRAM) which loses data when the power is turned off. But a computer built with memristors could allow PCs that start up instantly, laptops that retain sessions after the battery dies, or mobile phones that can last for weeks without needing a charge. “If you turn on your computer it will come up instantly where it was when you turned it off,” Professor Williams told Reuters.
In addition the memristor is very small and once fully commercialised could allow computer chips far smaller than those today, giving good old Moore’s Law another reprieve as conventional methods to keep it going begin to run out of steam.