Measurement and Modeling of Noise Source Impedance of Electronic Equipment
J. R. Regué, Miquel Ribó, D. Duran, David Badia, A. Pérez · 2004
In this paper a measurement technique, based on network analyser measurements, useful to determine the noise source impedance of on-line electronic equipment is presented. Measurements performed using this technique are used to determine the values of an impedance model composed by three impedances, which is finally used to calculate the value of common and differential mode impedances and the value of the transimpedance between common and differential mode and vice versa. The knowledge of the values of these impedances can be very helpful to choose the correct EMI power-line filter or to determine the conducted emission level at any line impedance. The validity and usefulness of this technique is demonstrated by real measurements.