An Extended-Range Incremental CT Sigma Delta ADC with Optimized Digital Filter
2012 (English)In: 2012 13th International Symposium On Quality Electronic Design (ISQED), IEEE , 2012, 179-184 p.Conference paper (Refereed)
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.
, International Symposium on Quality Electronic Design, ISSN 1948-3295
A/D conversion, extended-range sigma-delta ADC, continuous-time
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject SRA - ICT
IdentifiersURN: urn:nbn:se:kth:diva-95459DOI: 10.1109/ISQED.2012.6187492ISI: 000309266000026ScopusID: 2-s2.0-84863637741ISBN: 978-1-4673-1036-9OAI: oai:DiVA.org:kth-95459DiVA: diva2:528491
13th International Symposium on Quality Electronic Design (ISQED) Location: Santa Clara, CA Date: MAR 19-21, 2012
FunderSwedish Research Council
QC 201206072012-06-072012-05-252013-09-16Bibliographically approved