By Topic

Behavioral modeling of continuous time ΔΣ modulators

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
R. Sobot ; Simon Fraser Univ., Burnaby, BC, Canada ; S. Stapleton ; M. Syrzycki

A mixed-signal continuous time behavioral model of a continuous time delta-sigma modulator (CT ΔΣ) is presented. CT ΔΣ modulators, by their nature, are mixed-signal systems. That fact creates a discontinuity in the traditional IC design flow which assumes that "discrete" and "continuous" time domain designs require separate design tools. We present a top level behavioral CT ΔΣ model that can be used within the analog IC design environment. High speed CT ΔΣ modulators are implemented using both "analog" and "digital" subblocks. We created mixed-signal models of the subblocks in order to efficiently perform simulations that accurately reflect circuit behavior in the continuous time domain. The models were built out of primitives available in SPICE and Verilog-A. We present a first order CT low-pass ΔΣ (CTLP ΔΣ) as well as a fourth order CT band-pass ΔΣ (CTBP ΔΣ) to demonstrate the modeling technique and simulation methodology. We explored the influence of the loop delay and clock jitter on the CT ΔΣ performance.

Published in:

Behavioral Modeling and Simulation, 2003. BMAS 2003. Proceedings of the 2003 International Workshop on

Date of Conference:

7-8 Oct. 2003