Circuit optimization via sequential computer experiments: Design of an output buffer

Circuit optimization via sequential computer experiments: Design of an output buffer

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Article ID: iaor19992089
Country: United Kingdom
Volume: 47
Issue: 1
Start Page Number: 31
End Page Number: 48
Publication Date: Jan 1998
Journal: Applied Statistics
Authors: , , , ,
Keywords: optimization
Abstract:

In electrical engineering, circuit designs are now often optimized via circuit simulation computer models. Typically, many response variables characterize the circuit's performance. Each response is a function of many input variables, including factors that can be set in the engineering design and noise factors representing manufacturing conditions. We describe a modelling approach which is appropriate for the simulator's deterministic input–output relationships. Non-linearities and interactions are identified without explicit assumptions about the functional form. These models lead to predictors to guide the reduction of the ranges of the designable factors in a sequence of experiments. Ultimately, the predictors are used to optimize the engineering design. We also show how a visualization of the fitted relationships facilitates an understanding of the engineering trade-offs between responses. The example used to demonstrate these methods, the design of a buffer circuit, has multiple targets for the responses, representing different trade-offs between the key performance measures.

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