High voltage sampling scheme independent of capacitor voltage coefficient for a delta sigma modulator
Name
1020174521-MIT.pdf
Description
Full printable version
Size
3.39 MB
Format
Adobe PDF
Checksum (MD5)
c06ea3dfc1834e633f622b4eaecf2550
Author(s)
Uyehara, Chad P
Advisor(s)
Charles G. Sodini and Michael Kultgen.
Date Issued
2017
Publisher
Massachusetts Institute of Technology
Abstract
The rapidly growing market of electric vehicles has motivated the research for safe and effective monitoring of large battery packs. This paper presents a unique sampling scheme for a delta sigma modulator that is independent of common mode voltage. The rejection of common mode voltage is important in the application of electric vehicles and other large battery packs in order to accurately measure every cell on the stack with varying common mode voltages. A switched capacitor implementation is the proposed solution, and simulations in Cadence provide the results. The simulations of the circuit supported the claim that it is independent of common mode voltage. The tradeoffs include degradation over temperature and signal level. The new topology also introduces the possibility of a less complex input bias cancellation circuit that can be researched in the future.
Description
Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2017.
Cataloged from PDF version of thesis.
Includes bibliographical references (page 32).
Subjects
Electrical Engineering and Computer Science.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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