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Homework Help: Help with op-amp analysis

  1. Oct 31, 2008 #1
    1. The problem statement, all variables and given/known data
    A. solve for input equiv. resistance =Vtest/Itest as a function of R1,R2, and R3
    B. Calculate Req for R1 = R2 = 2.2K(ohm) and R3= 4.7k(ohm)
    (circuit picture is attached)

    http://img444.imageshack.us/img444/7417/circuithz5.jpg [Broken]
    2. Relevant equations

    Va = Vc = Vtest

    3. The attempt at a solution
    I have no idea how to approach this, I think it would be most helpful to be given the final Itest and Vtest values in terms of R's so that I can make sense of it, because my teacher tried getting me to do KCL and KVL and it pretty much failed and I got 1/1

    Attached Files:

    Last edited by a moderator: May 3, 2017
  2. jcsd
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