Noise-Sensitive Feedback Loop Identification in Linear Time-Varying Analog Circuits Conference Paper uri icon

abstract

  • © 2017 IEEE. The continuing scaling of VLSI technology and design complexity has rendered robustness of analog circuits a significant concern. Parasitic effects may introduce unexpected marginal instability within multiple noise-sensitive loops and hence jeopardize circuit operation and processing precision. The Loop Finder algorithm has been recently proposed to allow detection of noise-sensitive return loops for circuits that are described using a linear time-invariant (LTI) system model. However, many practical circuits such as switched-capacitor filters and mixers present time-varying behaviors which are intrinsically coupled with noise propagation and introduce new noise generation mechanisms. For the first time, we take an in-depth look into the marginal instability of linear periodically time-varying (LPTV) analog circuits and further develop an algorithm for efficient identification of noise-sensitive loops, unifying the solution to noise sensitivity analysis for both LTI and LPTV circuits.

author list (cited authors)

  • Li, A., Li, P., Huang, T., & Sánchez-Sinencio, E.

citation count

  • 1

editor list (cited editors)

  • Atienza, D., & Natale, G. D.

publication date

  • March 2017

publisher