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Magnitude Scaling for Increased SFDR in DDFS
Linköping University, Department of Electrical Engineering, Electronics System. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-1549-482X
Linköping University, Department of Electrical Engineering, Electronics System. Linköping University, The Institute of Technology.ORCID iD: 0000-0003-3470-3911
2011 (English)In: 29th Norchip Conference, Lund, Sweden, 14-15 November 2011, IEEE , 2011, 1-4 p.Conference paper, Published paper (Refereed)
Abstract [en]

When generating a sine table to be used in, e.g., frequency synthesis circuits, a widely used way to assign the table content is to simply take a sine wave with the desired amplitude and quantize it using rounding.This results in uncontrolled rounding of up to 0.5 LSB, causing some noise.In this paper we present a method for increasing the signal quality, simply by adjust the amplitude within a ±0.5 range from the intended. This will not affect the maximum value of the sinusoid, but can increase the spurious free dynamic range with some dB.

Place, publisher, year, edition, pages
IEEE , 2011. 1-4 p.
Keyword [en]
Direct Digital Frequency Synthesis, DDFS, Spurious Free Dynamic Range, SFDR, ROM, Matlab algoritm
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:liu:diva-72128DOI: 10.1109/NORCHP.2011.6126708ISBN: 978-1-4577-0515-1 (print)ISBN: 978-1-4577-0514-4 (print)OAI: oai:DiVA.org:liu-72128DiVA: diva2:457452
Conference
2011 NORCHIP; Lund; Sweden
Available from: 2011-11-28 Created: 2011-11-17 Last updated: 2015-03-11Bibliographically approved

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Källström, PetterGustafsson, Oscar

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
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  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
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  • sv-SE
  • Other locale
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Output format
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