3. Internal activity measurement
Most of the time, internal activity (IA) is not accessible
directly. The transfer function of PDN has been already
extracted and the current flowing externally, I
has been
measured. Depending on which analysis is needed, IA can be
described either in the time or in the frequency domain. The
current measurement set-up has been used in our measurement
shown in Fig. 10. Spectrum Analyzer, power supply, amplifier ,
and S12X microcontroller were set up in this measurement.
Firstly the current, which was used for finding the external
current, had been measured.
ext