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Response surface modeling

Response surface modeling

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Modelling Methodologies in Analogue Integrated Circuit Design — Recommend this title to your library

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In this chapter, we discuss several state-of-the-art RSM methods for performance modeling of analog and AMS circuits. RSM aims to approximate a given PoI by the linear combination of a set of basis functions. If the number of training samples is much larger than the number of adopted basis functions, the model coefficients can be accurately estimated by using LS regression. To reduce the number of required training samples and, hence, the modeling cost, we can explore the sparsity of model coefficients and, next, cast performance modeling to an L0-norm regularization problem. Both OMP and L1-norm regularization can be used to efficiently approximate the sparse solution of L0-norm regularization. Alternatively, based on the observation that today's AMS circuits are often designed via a multistage fl ow, BMF attempts to reduce the modeling cost by fusing the early -stage and late -stage data together through Bayesian inference. As an important aspect of future research, a number of recently developed machine learning techniques, such as deep learning, maybe further adopted for RSM for AMS applications.

Chapter Contents:

  • 2.1 Introduction
  • 2.2 Problem formulation
  • 2.3 Least-squares regression
  • 2.4 Feature selection
  • 2.4.1 Orthogonal matching pursuit
  • 2.4.2 L1-norm regularization
  • 2.4.3 Cross-validation
  • 2.4.4 Least angle regression
  • 2.4.5 Numerical experiments
  • 2.5 Regularization
  • 2.6 Bayesian model fusion
  • 2.6.1 Zero-mean prior distribution
  • 2.6.2 Nonzero-mean prior distribution
  • 2.6.3 Numerical experiments
  • 2.7 Summary
  • Acknowledgments
  • References

Inspec keywords: response surface methodology; integrated circuit design; regression analysis; mixed analogue-digital integrated circuits

Other keywords: machine learning techniques; linear combination; RSM methods; modeling cost reduction; AMS circuits; model coefficients; L0-norm regularization problem; OMP; performance modeling; Bayesian inference; response surface modeling; BMF; LS regression; L1-norm regularization; analog and mixed signal circuits; multistage flow

Subjects: Optimisation techniques; Mixed analogue-digital circuits; Analogue circuit design, modelling and testing; Digital circuit design, modelling and testing; Other topics in statistics

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