engleski

Fault Analysis of Structures with Low Sensitivity in Realisation of Active Filters

The components values in electrical circuits deviate from nominal ones due to different reasons: component tolerances, aging etc. If deviations are inside tolerance bounds, sensitivity analysis could be performed in order to asses network’ s characteristic changes. If component values deteriorate outside tolerance bounds, than we speak about failures of the network. In the latter case it is necessary to carry out the fault isolation procedure and one need to perform the testability analysis first in order to find optimal testing conditions. This paper tries to find correlation between sensitivity (Shoeffler’ s) of a network characteristic and testability on single component failures. The emphasis is on the analog filters. In one example the testability and sensitivity analyses were done on the eight order Chebyshev narrow band pass filter which was realised by different structures, i.e. CAS, FLF, CBQ and LF. The main conclusion is that those structures having lower sensitivities, have lower testability too, in the corresponding frequency bands. Therefore, Shoeffler’ s sensitivity could be proposed as the measure of testability.

fault analysis; structures with low sensitivity; active filters

Proceedings of the 41st Annual Conference on Croatian Society for Communications, Computing, Electronics, Measurement and Control (Proceedings KoREMA ’96) ; ISBN 9536037130 (cjelina)