Criteria for indirect measurements in M-S testing
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Analog and mixed-signal circuit testing is a cballenging task demanding large amounts of resources. In order to battle against this drawback, alternate testing has been established as an eflicient way of testing analog and M-S circuits by using indirect measures instead of the classic specification based testing. In this work we propose the use of Kendall's Tau rank correlation coeflicient for rating the suitability of a set of candidate indirect measures to be used in mixed-signal testing. Such criterion is shown to be adequate since it allows to avoid or minimize information redundancy in the measures set. As a proof of concept, a 4th order band-pass Butterworth filter has been simulated under the presence of process variations. The circuit has been tested using a subset of measures selected according to minimum Kendall's Tau coeflicient. Analog test efliciency metrics are reported showing test misclassification rate is among the best 15% possible, therefore validating the proposal.
CitacióÁlvaro Gómez-Pau; Balado, L.; Figueras, J. Criteria for indirect measurements in M-S testing. A: Workshop on Statistical Test Methods. "Handout of papers: 1st Workshop on statistical test methods: 29-30 May 2014, Paderborn, germany: fringe event to ETS 2014". Paderborn: 2014, p. 1-6.
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