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Configuring op-amp to supply constant current

  1. Dec 1, 2011 #1
    1. The problem statement, all variables and given/known data

    How could an op-amp with feedback be configured so that it would supply a constant current to some load, even if the resistance of the load changed?

    2. Relevant equations

    None. Just a general question.

    3. The attempt at a solution

    I don't really know how to approach this as I don't have a huge amount of knowledge of electronics.
     
  2. jcsd
  3. Dec 1, 2011 #2

    gneill

    User Avatar

    Staff: Mentor

    If you want something held constant it usually needs to participate in the feedback path in some way...
     
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