transistors

Discussion in 'Homework Help' started by jmckain78, Apr 16, 2010.

  1. jmckain78

    Thread Starter New Member

    Mar 7, 2010
    3
    0
    How do I find the alpha DC when the VE is 4 volts and the base current is 100μA? Do I need to find the beta first?
     
  2. Wendy

    Moderator

    Mar 24, 2008
    20,766
    2,536
    I assume you mean the alpha of the transistor.

    Alpha and Beta are two different aspects of the same thing. Alpha is usually just under one, and can be calculated directly from beta, which is the current gain. Since Beta is very dependent on the voltage and current setups (in theory it should be a fixed number) Alpha will vary a little too. However, the different between an Alpha of .9992 and .9995 is a lot less significant that a large shift in beta.

    From the AAC ebook:
    Chapter 4: BIPOLAR JUNCTION TRANSISTORS
     
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