Source: cirosantilli/bipolar-junction-transistor
= Bipolar junction transistor
{title2=BJT}
{title2=1948}
{wiki}
By <William Shockley> in 1948 also at <Bell Labs Murray Hill>.
As of 2020, not used anymore in <logic gates>, but still used in <amplifiers>.
\Image[https://upload.wikimedia.org/wikipedia/commons/6/6b/NPN_BJT_%28Planar%29_Cross-section.svg]