The hemt: A superfast transistor: An experimental GaAs-AlGoAs device switches in picoseconds and generates little heat. This is just what supercomputers need

A new transistor is being born in laboratories around the world, the fastest yet. It switches on or off in only slightly more than 10 picoseconds. It functions not only as a digital switch, but can also serve as an analog amplifier at frequencies up to about 60 gigahertz.