A Comparator-Based Switched-Capacitor delta sigma modulator
Author(s)
Ouyang, Jingwen, M. Eng. Massachusetts Institute of Technology
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Alternative title
CBSC delta sigma modulator
Other Contributors
Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
Advisor
Jeffrey Hinrichs and Joel L Dawson.
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Show full item recordAbstract
Comparator-Based Switched-Capacitor (CBSC) is a relatively new topology that replaces op-amps in sampled-data systems with a comparator and a set of current mirrors. CBSC is expected to lower power consumption, and to avoid several delicate tradeoffs of op-amp circuits. In this paper, the original single-ended CBSC block is extended to a fully differential version. The differential CBSC is then applied to an industrial standard second order delta-sigma modulator originally based on op-amps. Due to the differences between CBSC and op-amp, a few architectural changes are necessary for the original modulator. Finally, the performance of transistor level simulation of this CBSC based modulator is evaluated.
Description
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, February 2010. Cataloged from PDF version of thesis. Includes bibliographical references (p. 81).
Date issued
2010Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer SciencePublisher
Massachusetts Institute of Technology
Keywords
Electrical Engineering and Computer Science.