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Homework Help: How to find the Vout in terms of Vin for this circuit?

  1. Apr 21, 2015 #1
    1. The problem statement, all variables and given/known data
    Finding Vout in terms of Vin
    Assuming an ideal op-amp
    2. Relevant equations
    Nodal Analysis

    3. The attempt at a solution
    I am able to caluclate V(pi) and therefore,the value of the current source. However, I am not sure how the current flows after that. Shouldn't the current from the current source get trapped in the first loop since the nodes at the upper right and to the bottom of the current source are at zero potential and therefore,Vout will always be 0?

    Is there any current flow from the node below the current source to the ground to the left?

    Attached Files:

  2. jcsd
  3. Apr 21, 2015 #2


    User Avatar

    Staff: Mentor

    All the ground symbols are effectively the same node, so imagine the circuit drawn this way:

    Does that help you?

    Another hint: Think about turning the controlled current source and 3.3k resistor into a voltage source (Thevenin).
  4. Apr 22, 2015 #3
    It becomes a lot easier after the source transformation. Thanks!
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