This paper describes the current activity measurement and
modeling of integrated circuits for electromagnetic
conducted emission. In this study, a test circuit including the
MC9S12XMAG-family microcontroller was designed and
measurements were made to confirm the applied
measurement techniques. Moreover, internal current was
obtained from the measured external current which is
described as a dynamic current activity on the die. The input
impedance measurements were performed in the frequency
range from 1MHz to 2GHz. The passive distribution
network was extracted with the differential evolution
algorithm from the measured impedance – frequency curve
and results were compared with the measurements. The
external current was measured by the spectrum analyzer
has been used to obtain the internal current of the die.
Extracted passive distribution network and internal activity
component values have been given to obtain the integrated
circuit emission model.