A frequency relaxation approach for analog/RF system-level simulation

Conference Paper

The increasing complexity of today's mixed-signal integrated circuits necessitates both top-down and bottom-up system-level verification. Time-domain state-space modeling and simulation approaches have been successfully applied for such purposes (e.g. Simulink); however, analog circuits are often best analyzed in the frequency domain. Circuit-level analyses, such as harmonic balance, have been successfully extended to the frequency domain, but these algorithms are impractical for simulating large systems with wide-band input and noise signals. In this paper we proposed a frequency-domain approach for analog/RF system-level simulation that is capable of capturing various second order effects (e.g. nonlinearity, noise, etc.) for both time-invariant and time-varying systems with wide-band inputs. The simulator directly evaluates the frequency domain response at each node via a relaxation scheme that is proven to be convergent under typical circuit conditions. Our experimental results demonstrate the accuracy and efficiency of the proposed simulator under various wide-band input and noise excitations.

Full Text

Duke Authors

Cited Authors

  • Li, X; Xu, Y; Li, P; Gopalakrishnan, P; Pileggi, LT

Published Date

  • January 1, 2004

Published In

Start / End Page

  • 842 - 847

International Standard Serial Number (ISSN)

  • 0738-100X

Digital Object Identifier (DOI)

  • 10.1145/996566.996792

Citation Source

  • Scopus