Test frequency selection for band-pass filters

The paper discusses the selection of an appropriate set of test frequencies in the multifrequency parametric fault diagnosis of band-pass filters. Selected frequencies depend on the filter quality factor Q and they are the same for all groups of testable components. The selection of single frequency and double frequencies is shown for the second-order band-pass filter in the current-mode. The method can be used either to locate faulty components or to estimate a priori unknown parasitic parameters of active circuit elements.