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Bipolar Junction Transistors (BJTs)

Bipolar Junction Transistors (BJTs). The bipolar junction transistor (BJT) is constructed with three doped semiconductor regions called emitter , base , and collector . These three regions are separated by two pn junctions: The base-emitter junction and the base-collector junction .

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Bipolar Junction Transistors (BJTs)

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  1. Bipolar Junction Transistors (BJTs) The bipolar junction transistor (BJT) is constructed with three doped semiconductor regions called emitter, base, and collector. These three regions are separated by two pnjunctions: The base-emitter junction and the base-collector junction.

  2. BJT Symbols The transistor symbol indicates the structure of the component. The transistor on the left is an npn transistor. It has n-type emitter and collector materials, and a p-type base material. The transistor on the right is a pnp transistor. It has p-type emitter and collector materials, and an n-type base material.

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