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The two basic types of transistors are the NPN transistorand the PNP transistor. Certainly there are many other semiconductor devices, but these are arguably the two basic ones.
Wiki User
∙ 15y ago
Wiki User
∙ 13y agoThere are two classifications or types of transistors. They are either NPN or PNP.
NPN is consisting of a layer of P-doped semiconductor (the "base") between two N-doped layers. PNP is the opposite consisting of a layer of N doped material between two P-doped layers. These devices are used in electronics for anything to communications equipment, to semiconductors. With the advances in technology there are entire circuits of transistors built in to individual chips.
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