What is the following circuit role

Discussion in 'Homework Help' started by gbox, Jun 9, 2016.

  1. gbox

    Thread Starter Member

    Dec 29, 2015
    42
    0
    I have got the following circuit:

    [​IMG]

    I can not figure out what is it supposed to do
     
  2. dl324

    Distinguished Member

    Mar 30, 2015
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    What part of the circuit do you understand (or not understand)?
     
  3. gbox

    Thread Starter Member

    Dec 29, 2015
    42
    0
    I am trying to build a formulate YX as function of V_in (AC)
     
  4. dl324

    Distinguished Member

    Mar 30, 2015
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    This is homework. Show your best effort and someone will try to guide you.
     
  5. WBahn

    Moderator

    Mar 31, 2012
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    Why do you want the product of Y and X as a function of V_in?

    It's looks to me like V_in IS the signal X.

    Do you know about small signal models?
     
  6. DickCappels

    Moderator

    Aug 21, 2008
    2,653
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    (Hint: In this circuit the signal flows from right to left and the base of the transistor connects to both the 39k and the 3.3 k resistors. It is very poorly drawn )
     
  7. shteii01

    AAC Fanatic!

    Feb 19, 2010
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    connect?
     
  8. DickCappels

    Moderator

    Aug 21, 2008
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    Corrected. My eyesight is not that good and sometimes I get my fingertips misaligned on the keyboard.
     
  9. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,346
    Hello,

    I have flipped the picture and added the connection dots.

    gbox_77neI6F.png

    Bertus
     
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