Fault-based testing and diagnosis of balanced filters

The test and diagnosis of fully differential analogue filters are addressed in this paper. Full coverage of hard/soft faults affecting circuit behaviour can be achieved by adjusting the tolerance window of the built-in self-test circuitry and the amplitude and frequency of the input test signal. Under a single fault assumption, the faulty active or passive component is located and the actual defective value of a faulty passive component is determined. A test generation procedure which results in maximum fault coverage and maximal diagnosis of hard/soft faults in the filter is presented. The test and diagnosis approach can be made compatible with IEEE Std 1149.1 for boundary scan testing.This work is part of AMATIST ESPRIT-III Basic Research Project, funded by CEC under contract #8820.