Efficient shaped quantizer dithering implementation for sigma delta modulators

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dc.contributor.author Harmanani, Haidar M.
dc.contributor.author Ferzli, Rony
dc.contributor.author Anabtawi, Nijad
dc.date.accessioned 2017-03-28T11:49:32Z
dc.date.available 2017-03-28T11:49:32Z
dc.date.issued 2017-03-28
dc.identifier.isbn 978-1-4799-4242-8 en_US
dc.identifier.uri http://hdl.handle.net/10725/5445
dc.description.abstract A well-known limitation of sigma delta modulators is the generation of limit cycle oscillations for DC and slow varying inputs. These limit cycles give rise to undesired tones at the output of the modulator which result in the deterioration of the signal to noise ratio (SNR). However, the use of high dither signal amplitude results in raising the in-band noise floor level. Based on the analysis presented in this paper, it is shown that the required dithering amplitude can be minimal depending on the oversampling ratio (OSR). Moreover, a new dither injection technique for sigma delta modulators is presented based on the analysis findings. The proposed circuit effectively eliminates the undesired tonal components of the modulator though the randomization of the comparator's threshold levels. Simulation results using a first order single bit ΣΔ modulator show the suppression of the tonal components while deteriorating the SQNR by less than 1 dB. en_US
dc.language.iso en en_US
dc.publisher IEEE en_US
dc.title Efficient shaped quantizer dithering implementation for sigma delta modulators en_US
dc.type Conference Paper / Proceeding en_US
dc.author.school SAS en_US
dc.author.idnumber 199490170 en_US
dc.author.department Computer Science and Mathematics en_US
dc.description.embargo N/A en_US
dc.keywords Modulation en_US
dc.keywords Sigma-delta modulation en_US
dc.keywords Noise en_US
dc.keywords Inverters en_US
dc.keywords Educational institutions en_US
dc.keywords Floors en_US
dc.keywords Capacitors en_US
dc.identifier.doi http://dx.doi.org/10.1109/ICECS.2014.7050098 en_US
dc.identifier.ctation Anabtawi, N., Ferzli, R., & Harmanani, H. M. (2014, December). Efficient shaped quantizer dithering implementation for sigma delta modulators. In Electronics, Circuits and Systems (ICECS), 2014 21st IEEE International Conference on (pp. 766-769). IEEE. en_US
dc.conference.date 7-10 Dec. 2014 en_US
dc.conference.pages 766-769 en_US
dc.conference.place Marseille, France en_US
dc.conference.title 2014 21st IEEE International Conference on Electronics, Circuits and Systems en_US
dc.identifier.tou http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php en_US
dc.identifier.url http://ieeexplore.ieee.org/abstract/document/7050098/ en_US
dc.author.affiliation Lebanese American University en_US

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