Efficient shaped quantizer dithering implementation for sigma delta modulators
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 hig...
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2017
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| Online Access: | http://hdl.handle.net/10725/5445 http://dx.doi.org/10.1109/ICECS.2014.7050098 http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php http://ieeexplore.ieee.org/abstract/document/7050098/ |
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| _version_ | 1864513477036474368 |
|---|---|
| author | Harmanani, Haidar M. |
| author2 | Ferzli, Rony Anabtawi, Nijad |
| author2_role | author author |
| author_facet | Harmanani, Haidar M. Ferzli, Rony Anabtawi, Nijad |
| author_role | author |
| dc.creator.none.fl_str_mv | Harmanani, Haidar M. Ferzli, Rony Anabtawi, Nijad |
| dc.date.none.fl_str_mv | 2017-03-28T11:49:32Z 2017-03-28T11:49:32Z 2017-03-28 |
| dc.identifier.none.fl_str_mv | 978-1-4799-4242-8 http://hdl.handle.net/10725/5445 http://dx.doi.org/10.1109/ICECS.2014.7050098 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. http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php http://ieeexplore.ieee.org/abstract/document/7050098/ |
| dc.language.none.fl_str_mv | en |
| dc.publisher.none.fl_str_mv | IEEE |
| dc.rights.*.fl_str_mv | info:eu-repo/semantics/openAccess |
| dc.title.none.fl_str_mv | Efficient shaped quantizer dithering implementation for sigma delta modulators |
| dc.type.none.fl_str_mv | Conference Paper / Proceeding info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/conferenceObject |
| description | 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. |
| eu_rights_str_mv | openAccess |
| format | conferenceObject |
| id | LAURepo_1221ea60822b0b7970dbc2e459ec2f44 |
| identifier_str_mv | 978-1-4799-4242-8 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. |
| language_invalid_str_mv | en |
| network_acronym_str | LAURepo |
| network_name_str | Lebanese American University repository |
| oai_identifier_str | oai:laur.lau.edu.lb:10725/5445 |
| publishDate | 2017 |
| publisher.none.fl_str_mv | IEEE |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| spelling | Efficient shaped quantizer dithering implementation for sigma delta modulatorsHarmanani, Haidar M.Ferzli, RonyAnabtawi, NijadA 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.N/AIEEE2017-03-28T11:49:32Z2017-03-28T11:49:32Z2017-03-28Conference Paper / Proceedinginfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject978-1-4799-4242-8http://hdl.handle.net/10725/5445http://dx.doi.org/10.1109/ICECS.2014.7050098Anabtawi, 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.http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.phphttp://ieeexplore.ieee.org/abstract/document/7050098/eninfo:eu-repo/semantics/openAccessoai:laur.lau.edu.lb:10725/54452021-03-19T10:03:22Z |
| spellingShingle | Efficient shaped quantizer dithering implementation for sigma delta modulators Harmanani, Haidar M. |
| status_str | publishedVersion |
| title | Efficient shaped quantizer dithering implementation for sigma delta modulators |
| title_full | Efficient shaped quantizer dithering implementation for sigma delta modulators |
| title_fullStr | Efficient shaped quantizer dithering implementation for sigma delta modulators |
| title_full_unstemmed | Efficient shaped quantizer dithering implementation for sigma delta modulators |
| title_short | Efficient shaped quantizer dithering implementation for sigma delta modulators |
| title_sort | Efficient shaped quantizer dithering implementation for sigma delta modulators |
| url | http://hdl.handle.net/10725/5445 http://dx.doi.org/10.1109/ICECS.2014.7050098 http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php http://ieeexplore.ieee.org/abstract/document/7050098/ |