A High-electron-mobility transistor (HEMT, also known as a hetero-structure or hetero-junction FET) is a junction FET utilising two materials with different band gaps (i.e. a hetero-junction) as the channel instead of the doped region used in a MOSFET. HEMT transistors exhibit good high frequency characteristics and are generally used in small-signal low-noise RF applications.
HEMT, HFET, HJ-FET and MODFET are all terms used to describe transistors of this type.
The pHEMT or pseudomorphic-HEMT is variant of the basic HEMT transistor type, with E-pHEMT devices being Enhancement mode types.

JFET Transistors

A range of JFET (junction field-effect transistor) and HEMT/HFET (high-electron-mobility transistor/ hetero-junction FET) discrete semiconductor devices.