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LC filter question

  1. Nov 14, 2014 #1
    I am trying to figure out how to model a scope probe ground lead and signal lead.
    Both leads would have some impedance and the probe would have some pf capacitance.
    How to deal with both the inductances?
     
  2. jcsd
  3. Nov 14, 2014 #2

    berkeman

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    Staff: Mentor

    Have you seen the schematic for a typical 10x 'scope probe? You can start with that, and add the ground lead inductance into the model. If you use Google Images to search for oscilloscope probe schematic, you get images and links like the one below.

    To model the inductance, start with the loop inductance for a loop the same size as that formed when you connect the probe tip and ground lead near each other in a circuit.

    http://electronics-diy.com/schematics/967/Scope-Schematic-1.jpg
    Scope-Schematic-1.jpg
     
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