Thursday, May 01, 2008

The 4th fundamental circuit element has a memory of its past


A group of researchers from Hewlett-Packard have discovered a 4th basic circuit element, the memristor. It's unique because, unlike the resistor, capacitor and inductor, it has a memory of its past. When you turn it off, it remembers how much voltage was applied and for how long. It's fundamental because this behavior can not be realized by any combination of resistors, capacitors, and inductors. Read all about it in the May 2008 IEEE Spectrum. (Image: J. J. Yang/HP Labs)