transistor

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

  1. theertham

    Thread Starter New Member

    Apr 28, 2012
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    0
    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

    Expert

    Nov 30, 2010
    16,313
    6,817
    The highest frequency of amplification will change.

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

    Thread Starter New Member

    Apr 28, 2012
    26
    0
    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

    New Member

    Dec 20, 2007
    9,411
    896
    Your transistor is not biased properly so it probably won't work in your circuit.
     
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