Practical implementation of defect-oriented testing for a mixed-signal class-D amplifier

This paper describes the flow of defect-oriented testing from beginning to end, based on the industrial test development for a commercial mixed-signal class-D amplifier. A software tool called DOTSS (Defect-Oriented Test Simulation System) was used to perform the fault simulations. The greatest benefit of using defect-oriented testing turns out to be that it gives more insight in the underlying fault mechanisms. This information can be used to generate complementary tests or to take design-for-testability measures to achieve a high fault coverage.