[′tranz′fərd i¦lek‚trän ′am·plə‚fī·ər] (electronics) A diode amplifier, which generally uses a transferred-electron diode made from doped n-type gallium arsenide, that provides amplification in the gigahertz range to well over 50 gigahertz at power outputs typically below 1 watt continuous-wave. Abbreviated TEA.