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Homework Help: Amplitude modulation using using BC107 transistor

  1. Sep 24, 2008 #1
    1. The problem statement, all variables and given/known data

    In my electronics practical class, i assemble a ckt of amplitude modulation using BC107 transistor ,but the modulated wave always has the same phase up and above , there is no phase difference b/w the upper and lower part of the wave .

    My teacher also couldn't understand the problem . I made the ckt 3-4 time but same result .

  2. jcsd
  3. Sep 24, 2008 #2


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    If you don't post a circuit schematic, there's not much people here can do to help.
  4. Sep 24, 2008 #3
    Re: Amplitude modulation ?

    Sounds to me like non-linearity. Do you have the bias point set for class-A operation?
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