Magnitude Scaling for Increased SFDR in DDFS
2011 (English)In: 29th Norchip Conference, Lund, Sweden, 14-15 November 2011, IEEE , 2011, 1-4 p.Conference paper (Refereed)
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.
Direct Digital Frequency Synthesis, DDFS, Spurious Free Dynamic Range, SFDR, ROM, Matlab algoritm
National CategoryOther Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:liu:diva-72128DOI: 10.1109/NORCHP.2011.6126708ISBN: 978-1-4577-0515-1 (online)ISBN: 978-1-4577-0514-4 (print)OAI: oai:DiVA.org:liu-72128DiVA: diva2:457452
2011 NORCHIP; Lund; Sweden