Impact of parameter covariance on fault detectability estimation of analogue and mixed-mode circuits
Dimitris K. Papakostas, Alkis A. Hatzopoulos · IEE Proceedings - Circuits Devices and Systems · 2003
An extension to the method for estimating the fault detection probability, in order to include circuit parameters with covariance, is studied. The enhanced method takes into account the statistical variations and matching dependencies between circuit parameters and gives quite accurate and realistic results, while additional circuit simulations, compared to the previous method, are needed. The method is applied for the estimation of fault detectability in a simulation-before-test approach. Comparative results from analogue and mixed-mode circuits are presented to evaluate the contribution of the extended formulation.