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Yield optimization with correlated design parameters and non-symmetrical marginal distributions

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3 Author(s)
Ponnambalam, K. ; Dept. of Syst. Design Eng., Waterloo Univ., Ont., Canada ; Seifi, A. ; Vlach, J.

This paper extends the recently developed hybrid method to find the optimal designs of systems with correlated non-gaussian random parameters. A double-bounded density function is used to approximate marginal distribution and a Frank copula is used to define dependence (a more general concept than correlation) among the random parameters. We use a Piecewise Ellipsoidal method to approximate the constraint region by a set of quadratic functions. The yield is estimated by a joint cumulative density function over a portion of the tolerance body contained in the feasible region. Yield maximization is done for positive and negative correlations and non-symmetrical marginal distributions, and tested on an example using Monte-Carlo simulation.

Published in:

Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on  (Volume:4 )

Date of Conference:

25-28 May 2003