Abstract:
A digital signal processing method for measuring frequency response function of high-current devices are described. This is based on a joint digital processing of the input short pulse signal and a corresponding output. In order to measure the frequency response function, a short current pulse is applied to the shunt input; input and output signals of the shunt are recorded in a digital oscilloscope memory; then spectra of these two signals are computed. Amplitude and phase responses are determined by the arithmetic ratio of spectral components of the input and output signals at appropriate frequencies.
Keywords:pulse current source, current shunt, dynamic behaviour, testing automation..
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