Abstract: This paper presents a new method for analog circuit sizing to generate polynomial response surface models of the performance characteristics of an analog IC.This method generates a performance model with SPICE device-level accuracy for linear or nonlinear circuits and composes a geometric program that fully describes the analog circuit sizing problem.The unknown parameters of the polynomial response surface models are positive real coefficients and random real exponents.And this model is changeable to realize the limits of precision.Results validate the effectiveness of this approach to generate polynomial response surface models for an op-amp circuit.

Key words: analog circuit, sizing, convex problem, polynomial response surface models, geometric program, polynomial format