which formulae do i use to find the gain of this amplifer ?

Discussion in 'Homework Help' started by trappy, Mar 28, 2008.

  1. trappy

    Thread Starter New Member

    Mar 27, 2008
    7
    0
    Hi guys -
    i have a question im really stuck with,hope someone can help.

    Im asked to find the voltage gain av from the given diagram -
    And to comment on what is happening with the given graph results.

    http://i45.photobucket.com/albums/f69/fiatcoupe20vt/question gain/question2.jpg

    To work out the gain should i use -

    Av = - ( Rc ll Rd ) / Rs + 1/gm

    Or -

    - RL ll Rc / Re

    Or have i got the formulae completely wrong ?

    any help appreciated

    thanks
     
  2. trappy

    Thread Starter New Member

    Mar 27, 2008
    7
    0
    Hi guys , still struggling with this question, if i do the calculation with the first equation i get a gain of 5.375.

    just dont know if its right ?

    Any amplifier wizards out there that can advise ?

    thanks
     
  3. trappy

    Thread Starter New Member

    Mar 27, 2008
    7
    0
    anyone any pointers?
     
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