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A modified cascaded sigma-delta modulator with improved linearity
KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS.ORCID iD: 0000-0003-3802-7834
KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS.
2005 (English)In: IEEE Computer Society Annual Symposium on VLSI, Proceedings: NEW FRONTIERS IN VLSI DESIGN / [ed] Smailagic, A; Ranganathan, N, 2005, 77-82 p.Conference paper, Published paper (Refereed)
Abstract [en]

This paper presents a sigma-delta modulator architecture with improved linearity over a frequency band from DC to 10 MHz. The proposed modulator architecture employs the 2(nd) order 4-bit sigma-delta modulator with feedforward signal path in a 2-2 modified cascaded configuration, which greatly improves the tonal behavior even at 8X oversampling ratio (OSR). A Data-Weighted-Averaging technique eliminates tones generated by the multibit digital-to-analog converter (DAC) nonlinearity improving the spurious free dynamic range (SFDR) and intermodulation distortion performance. The modulator is designed in 0.18um CMOS process and operates at 1.8V supply voltage. It achieves 62.86 dB signal-to-noise plus distortion ratio (SNDR) in the 10MHz signal bandwidth, a SFDR of 82.2dB and IMD3 of -77.5dB.

Place, publisher, year, edition, pages
2005. 77-82 p.
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-43296DOI: 10.1109/ISVLSI.2005.10ISI: 000229610600013Scopus ID: 2-s2.0-26844525099ISBN: 0-7695-2365-X (print)OAI: oai:DiVA.org:kth-43296DiVA: diva2:448570
Conference
21st International Symposium on Lepton and Photon Interactions at High Energies Location: Batavia, IL Date: AUG 11-16, 2003
Note

QC 20111017

Available from: 2011-10-17 Created: 2011-10-14 Last updated: 2012-10-02Bibliographically approved

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Rusu, Ana

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
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  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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  • Other locale
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Output format
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