But there’s an earlier amplifier technology that used a solid state circuit which is largely forgotten, and [AWA Communication Technologies Museum] has featured it in a new video. We’re ...

Kelly suspected that solid state science might provide a new kind of amplifier to replace the vacuum tube in AT&T's phone system. The tubes amplified voice signals as they traveled through the ...

Combining multiple transistors produces high-power GaN solid-state power amplifiers, which in turn can be combined to build mega-watt industrial microwave generators. GaN technology provides much ...