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Output impedance of a buffer

tltoth

Hi,
Could anyone suggest a method to determine the output impedance of an iocell from ibis curves. The values from V/I curves are far from exact and the Trial and Error method is rather time consuming.
Thanks

  • Ejlersen

    Hi

    Using SigXplorer I would create a small circuit consisting of 2 iocells connected with a series resistor and a tline

    Setup a sweep of the series resistor value and then take the tline impedance - resistor value for the best simulation results will give you a very good indication of the the output impedance of the iocell. You'll probably have to select something that suits you for both Falling and rising edge.

     

    Best regards

    Ole

  • tltoth

    Thank you Ole!

    This is what I meant about Trial and Error because my license does not support sweep in Signal Explorer. But the method does really work.

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