2 stage amplifier design

Discussion in 'The Projects Forum' started by anydan, Apr 21, 2009.

  1. anydan

    Thread Starter New Member

    Apr 11, 2009
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    Hi all! please i need help here. i want to design a 2 stage amplifier with the following characteristics; Zi=100κΩ,Zo=330Ω,Vcc=12,bandwith=300db. transistor type=bc107/8/9. i have not done this before. can anybody help me with the circuit digram, design values and calculations. please this is needed urgently

    i've been thinking of a CE first stage and CC second stage in other to achieve the high input impedance and low output impedance. what do u think?
     
  2. -SK-

    Member

    Apr 14, 2009
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    Is this just for an audio signal? Or some kind of instrument signal? What is the magnitude and frequency of the input? How much gain do you want? Do you have to make a plain transistor amplifier?
     
  3. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    300db is not a frequency. Perhaps you meant 300kHz? What is the required gain?
     
  4. anydan

    Thread Starter New Member

    Apr 11, 2009
    4
    0
    Hi all! please i need help here. i want to design a 2 stage amplifier with the following characteristics; Zi=100κΩ,Zo=330Ω,Vcc=12,bandwith=300db. transistor type=bc107/8/9.



    sorry that's a slip. it's 300kHz for bandwith. it's a project work
     
  5. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    Pay attention! :D
    Gain
    is one of the essential characteristics of an amplifier. What is your requirement?
     
  6. Audioguru

    New Member

    Dec 20, 2007
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    Those transistors are about 40 years old and I don't think they are made anymore. I still have some.
     
  7. Stevezachtech

    New Member

    Apr 21, 2009
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    Try looking for 2nd hand electronics which are of the same time as yours maybe you can salvage those transistors.
     
  8. anydan

    Thread Starter New Member

    Apr 11, 2009
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    with the parameters given, i'm required to find gain(current and voltage) using appropriate circuit/equations and this is what has been giving tough time. like i said i have not done this before. pls help
     
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