Analog circuit module level fault diagnosis

An approach of feature extraction for analog circuit fault diagnosis is proposed based on the single module soft failure model. Making use of the approach, the single module fault feature extracted can not only be used to distinguish single module circuit fault effectively, but also be applied to the various modules electric circuit of single fault and faults of circumstance. The simulation is carried out where the sample electric circuit outputs is processed to get the fault catalog and the results show that the extracted feature can be used to locate the position of multi-modules fault circuit fault accurately.