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An Extended-Range Incremental CT Sigma Delta ADC with Optimized Digital Filter
KTH, School of Information and Communication Technology (ICT), Integrated Devices and Circuits.
KTH, School of Information and Communication Technology (ICT), Integrated Devices and Circuits.ORCID iD: 0000-0003-3802-7834
2012 (English)In: 2012 13th International Symposium On Quality Electronic Design (ISQED), IEEE , 2012, 179-184 p.Conference paper, Published paper (Refereed)
Abstract [en]

Extended range approach has been employed in discrete-time incremental sigma-delta analog-to-digital converters to reduce the number of cycles per conversion and therefore the power dissipation. In this work, extended range is combined with continuous-time filter implementation so as to reduce the integrators gain-bandwidth product requirement. The proposed architecture and mathematical analysis are presented using a 3rd order single-loop single-bit sigma-delta modulator as proof-of-concept. In order to overcome the analog-digital transfer functions mismatches, an appropriate digital filter is designed using optimization tools. Behavioral simulations show that the proposed architecture with an optimized filter achieves 13.8 bits resolution with a 4 kSamples/sec sampling rate to comply with a high-resolution biomedical application.

Place, publisher, year, edition, pages
IEEE , 2012. 179-184 p.
Series
International Symposium on Quality Electronic Design, ISSN 1948-3295
Keyword [en]
A/D conversion, extended-range sigma-delta ADC, continuous-time
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
SRA - ICT
Identifiers
URN: urn:nbn:se:kth:diva-95459DOI: 10.1109/ISQED.2012.6187492ISI: 000309266000026Scopus ID: 2-s2.0-84863637741ISBN: 978-1-4673-1036-9 (print)OAI: oai:DiVA.org:kth-95459DiVA: diva2:528491
Conference
13th International Symposium on Quality Electronic Design (ISQED) Location: Santa Clara, CA Date: MAR 19-21, 2012
Funder
Swedish Research Council
Note

QC 20120607

Available from: 2012-06-07 Created: 2012-05-25 Last updated: 2013-09-16Bibliographically approved

Open Access in DiVA

10.1109_ISQED.2012.6187492(161 kB)623 downloads
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Output format
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