An anonymous reader writes "Engineers at the Belgian research institute IMEC are looking at the use of silicon transistors in the sub-threshold region of their operation as a way of pursuing ultra-low power goals. A chip the engineers are designing for biomedical applications could have blocks designed to operate at 0.2 or 0.3 volts, researchers said, according to EE Times.
The threshold voltage is the point at which the transistor nominally switches off. Operating a transistor when it is "off" would make use of the leakage conduction that is normally seen as wasted energy, according to the article."Link to Original Source