College Assignment question need help!

Discussion in 'Homework Help' started by unknown93, Feb 13, 2013.

  1. unknown93

    Thread Starter New Member

    Feb 13, 2013
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    0
    The question is

    An amplifier has an open-loop gain off 99db's, if 10% of the output signal is fed-back into the input in antiphase with input signal, determine:

    (A) From the first principles the transfer function for the amplifier and
    (B) hence determine the closed-loop gain of the amplifier

    thanks :D
     
  2. MrChips

    Moderator

    Oct 2, 2009
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    This is not a homework assignment service provider.
     
  3. #12

    Expert

    Nov 30, 2010
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    We do have a Homework section. I'll ask to have this moved to the proper forum.
     
  4. WBahn

    Moderator

    Mar 31, 2012
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    What efforts have you made to solve the problem (never forget, it is YOUR problem)?

    Once you show your efforts, we will have something to hook into and help you make progress.
     
  5. unknown93

    Thread Starter New Member

    Feb 13, 2013
    2
    0
    im not asking for the answer, i just don't have a clue how to answer it
    so some sort of formulae would help

    thanks
     
  6. MrChips

    Moderator

    Oct 2, 2009
    12,442
    3,361
    Geeze, you don't get it. There is no formula.
    You have to work through the equations yourself.
    We don't know. This is your problem. Show us what you think is the proper approach.
    Start by drawing a diagram.
     
  7. WBahn

    Moderator

    Mar 31, 2012
    17,747
    4,796
    Can you draw a circuit diagram that matches the description given?

    What is the relationship between the input voltages to the amplifier and the output voltage?
     
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