transistor

Discussion in 'General Electronics Chat' started by theertham, Apr 30, 2012.

  1. theertham

    theertham Thread Starter New Member

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    in a collector to base bias circuit using pnp BC 558 , what happened if a capacitor of 10pF connected across base and collector ? Rb=1M, Rc= 4.7k, Vcc=9V.
     
  2. #12

    #12 AAC Fanatic!

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    The highest frequency of amplification will change.

    Where are you getting these questions?
    Is this homework?
     
  3. theertham

    theertham Thread Starter New Member

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    this is part of my project.. two stage amplification includes RC coupled amplifier and collector to base bias circuit.. in the collector to base bias circuit , 10 pF capacitor is connected and the output from collector is given to a divide by 10 counter as clock. thats why iam asking the advantage of 10pF capacitor. here frequency will be 40kHz
     
  4. Audioguru

    Audioguru New Member

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    Your transistor is not biased properly so it probably won't work in your circuit.
     
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