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Homework Help: BJT Differential Amplifier

  1. Oct 26, 2011 #1

    alexfung1992

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    Does anyone know how to build a simple BJT Differential Amplifier circuit? And also need to gain around 20..emergency please help. Thanks for that.

    As I build a circuit but is not simple enough, please have a look for that and any comment for this circuit?
    CurrentMirrors_x2.png
     
    alexfung1992, Oct 26, 2011
  2. jcsd
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  3. Oct 26, 2011 #2

    phyzguy

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    Science Advisor

    Try replacing Q1 and Q2 with two resistors.
     
    phyzguy, Oct 26, 2011
  4. Oct 26, 2011 #3

    alexfung1992

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    I see, thanks a lot
     
    alexfung1992, Oct 26, 2011
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