By Topic

Bounding integrator output of sigma-delta modulator by time delay feedback control

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 $33
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

1 Author(s)
A. Ucar ; Dept. of Electr.-Electron. Eng., Firat Univ., Elzig, Turkey

Internal integrator saturation is one of the practical problems arising in second- and high-order sigma-delta modulators (SDMs). It has been avoided by scaling integrator gains, feedback coefficients and other circuit parameters. In the paper, a novel compensation technique has been introduced to keep the signal levels throughout the modulator below saturation limits most of the time. The technique is based on feedback compensation and contains a delay element and a feedback gain and is employed for sigma-delta modulators by use of the unquantised output signal alone. The technique can readily be applied to various configurations of oversampling converters, single-loop and multiple-loop structures, and improves their stability.

Published in:

IEE Proceedings - Circuits, Devices and Systems  (Volume:150 ,  Issue: 1 )