reduce gain for transistor

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Discussion in 'General Electronics Chat' started by karas, Sep 8, 2011.

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  1. Sep 8, 2011 #1
    karas

    Thread Starter Active Member

    Sep 8, 2011
    153
    0
    to reduce gain for transistor we put resistor between base and emitter can someone help me what the effect of R that it lower the gain
    thanks
     
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  2. Sep 9, 2011 #2
    vrainom

    Active Member

    Sep 8, 2011
    126
    20
    I'll give you a hint: bipolar transistors' output current (collector-emitter junction) is proportional to the current flowing through the input (base-emitter junction). So if you place a resistor parallel to the input...
     
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    TAKYMOUNIR and karas like this.
  3. Sep 9, 2011 #3
    Adjuster

    Well-Known Member

    Dec 26, 2010
    2,147
    301
    Such a resistor reduces the current gain, but does not stabilise it. For this we normally apply negative feedback.

    @ vrainom: Is that nickname in line with the recent Google+ ruling?
     
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  4. Sep 9, 2011 #4
    vrainom

    Active Member

    Sep 8, 2011
    126
    20
    It's from an Yves Bonnefoy poem I like, and also kind of a word play since it means "true name"
     
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