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Collector,emitter and base

  1. Jul 30, 2011 #1
    greetings,
    what are the differences between base,emitter and collector?
    thanks.
     
  2. jcsd
  3. Jul 30, 2011 #2
    Lets examine a PNP transistor.

    The base is what controls the collector and the emitter, i.e. it acts as a flood gate and accepts only a tiny amount of current.

    the collector is the part that collects the current you want to control.

    The emitter is the part that releases the current you want to control.

    Imagine a door choking a river, the base would be the door, the collector the inlet, and the emitter the outlet.
     
  4. Jul 30, 2011 #3
    thanks.
    suppose we have three doped semiconductor,then how we can understand which one is what?
     
  5. Jul 30, 2011 #4

    Averagesupernova

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    Science Advisor
    Gold Member

    I call homework.
     
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