1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Reduce T-Network Feedback Resistance

  1. Jun 1, 2016 #1
    1. The problem statement, all variables and given/known data
    Reduce the feedback resistance for the following T-Network
    Capture.jpg

    2. Relevant equations
    Basic circuit analysis (Thevenin maybe?)

    3. The attempt at a solution
    My first though was to use Thevenin, and actually I've found some book used that method:
    Capture2.jpg
    Capture3.jpg
     
  2. jcsd
  3. Jun 1, 2016 #2

    gneill

    User Avatar

    Staff: Mentor

    The Thevenin approach looks fine. Did you have some question about it?
     
  4. Jun 1, 2016 #3
    Thank you for your quick respond. My question is whether this approach OK or not. And if the feedback resistance can be reduced more.
     
  5. Jun 1, 2016 #4

    gneill

    User Avatar

    Staff: Mentor

    The approach is good, and I doubt that the resistance can be simplified further (other than rearranging it algebraically) without plugging in actual values to reduce it to a number.
     
  6. Jun 2, 2016 #5

    donpacino

    User Avatar
    Gold Member

    Typically it is a good idea to get it in the form of

    G=NUM/DEN.

    in other words, simplify to get rid of R2*R3/R4 in the Numerator
     
  7. Jun 2, 2016 #6

    LvW

    User Avatar

    As an alternative, you can apply the star-triangle transformation.
    After applying this transformation there will be two resistors which do not influence the closed-loop gain (and can be neglected).
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Reduce T-Network Feedback Resistance
Loading...