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2. Transistor Types

  • BJT stands for bipolar junction transistor.

  • BJT transistors are used primarily in amplifying or switching applications (e.g. power supplies.)

  • FET stands for the field-effect transistor.

  • FET transistors rely on an electric field to control conductivity of a channel.

  • JFET stands for the junction gate field-effect transistor (or JUGFET), and is the simplest type of the field effect transistor.

  • See also: wikipedia articles about transistors and JFET transistors.

  • Common transistor circuit symbols:

    PNP P-channel
    NPN N-channel
    BJT JFET

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