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Output Impedance

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KaiFra edited this page Nov 18, 2018 · 1 revision
Messung Ausgangswiderstand

The output resistance of the device under test (DUT) may be determined by measuring the values of the voltage V_out (either RMS or peak-to-peak) across two different load resistances R_L1 and R_L2.

f1

Known is neither the voltage of the ideal DUT voltage source nor its inner resistance R_i. By two different measurements at different loads, the equation might be resolved for the Voltage U. Further, both results are equated and now the inner resistance is to be calculated.

With the setup shown here, the output impedance of the AMPs was measured to be about 0.19Ω. This value has been listed in the Getting Started.

f2

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