BJT amplifier circuit

Discussion in 'Homework Help' started by curriejohn, Jun 16, 2015.

  1. curriejohn

    Thread Starter New Member

    Feb 17, 2015
    14
    0
    Hi

    Would some body be able to show me the correct format on how to calculate the Gain for the attached circuit.

    I know Av = Vout/Vin but what is the best way to find out Vout!!!! Hope this makes sense.

    Thank you in advance.
     
  2. KLillie

    Member

    May 31, 2014
    126
    14
     
  3. KLillie

    Member

    May 31, 2014
    126
    14
    This looks like homework. If it is, they do have a section for that. If not, I'm thinking you may have to make some assumptions about your circuit.
     
  4. crutschow

    Expert

    Mar 14, 2008
    13,013
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    Do you need the exact gain equation or just an approximation?
     
  5. WBahn

    Moderator

    Mar 31, 2012
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    MOD NOTE: Moved to Homework Help from General Electronics Chat.
     
  6. WBahn

    Moderator

    Mar 31, 2012
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    What do you know so far about small-signal analysis of BJT circuits?
     
  7. curriejohn

    Thread Starter New Member

    Feb 17, 2015
    14
    0
    Hi Crutschow

    I just need the equation that will give me the Vo of the attached circuit so i can then calculate the Gain Av. Its a part of my home study college work that i am completing to upgrade my qualifications. I come on here to get some professional help from guys like you as studying from home with no tutor is fairly difficult.

    Thanks
     
  8. mxg2579

    New Member

    Jun 10, 2015
    15
    7
    Well like WBahn asked, do you know about small-signal analysis of BJT's? You will need to set-up the small signal analysis circuit and from there you will see Vin and Vout, and all you have to do is write some loop-equations, etc. to get Vout in terms of Vin.

    If you look on wikipedia for "Hybrid-Pi model" there is a pretty good illustration of the model and the associated equations. See if that helps
     
    Last edited: Jun 17, 2015
    curriejohn likes this.
  9. Jony130

    AAC Fanatic!

    Feb 17, 2009
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