Abstract
An improved method in fault detection in Analog Circuits is presented in this paper. The CUTs are subjected to a short undervoltage, and the transient current is measured. From the current measurement of the power supply during this time the mean and fundamental rms values are calculated. From these measurements for both the mean and the fundamental values three points of interest are extracted. The maximum/minimum over/undershooting values, the relaxation point values, and the damping point values. These twelve points of interest comprise the signature for comparison for all the subsequent CUTs. The algorithm is tested both in simulation and with actual measurements with actual CUTs
