transistor

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

  1. theertham

    theertham Thread Starter New Member

    Joined:
    Apr 28, 2012
    Messages:
    26
    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!

    Joined:
    Nov 30, 2010
    Messages:
    9,586
    Location:
    15 miles west of Tampa, Florida
    The highest frequency of amplification will change.

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

    theertham Thread Starter New Member

    Joined:
    Apr 28, 2012
    Messages:
    26
    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

    Joined:
    Dec 20, 2007
    Messages:
    9,411
    Location:
    Ontario, Canada
    Your transistor is not biased properly so it probably won't work in your circuit.
Similar Threads
Forum Title Date
General Electronics Chat (NPN/PNP Transistor Oct 9, 2014
General Electronics Chat Transistor capacitance multiplier Oct 9, 2014
General Electronics Chat transistor switching currents Oct 8, 2014
General Electronics Chat Arduino Output Pin to Switch a Transistor Oct 6, 2014
General Electronics Chat Common emitter BJT transistor circuit Oct 5, 2014

Share This Page