{"title":"用于电化学传感器阵列的96 dB SNDR电流模式连续时间ΔΣ调制器","authors":"Anouar Laifi, M. A. A. Abaji, R. Thewes","doi":"10.1109/MIXDES.2015.7208518","DOIUrl":null,"url":null,"abstract":"A low-voltage fully differential current-mode continuous time delta-sigma modulator is presented for application in electrochemical sensor arrays. Although a first order topology is realized by using a single differential integrator, second order noise shaping is achieved. A differential quantizer based on current controlled oscillators (CCOs) allows a current-mode implementation with high noise-immunity and low-voltage compatibility. Thanks to the differential design nonlinearity impact on circuit performance is kept low. Moreover, the typical clock-jitter sensitivity for continuous time modulators is addressed by a switched shaped-current feedback DAC. The modulator implemented in 180 nm standard CMOS technology consumes 28μW and achieves an SNDR of 95dB at a signal bandwidth of 10 kHz and an oversampling ratio of 256.","PeriodicalId":188240,"journal":{"name":"2015 22nd International Conference Mixed Design of Integrated Circuits & Systems (MIXDES)","volume":"8 23-24","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2015-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":"{\"title\":\"A 96 dB SNDR current-mode continuous-time ΔΣ modulator for electrochemical sensor arrays\",\"authors\":\"Anouar Laifi, M. A. A. Abaji, R. Thewes\",\"doi\":\"10.1109/MIXDES.2015.7208518\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A low-voltage fully differential current-mode continuous time delta-sigma modulator is presented for application in electrochemical sensor arrays. Although a first order topology is realized by using a single differential integrator, second order noise shaping is achieved. A differential quantizer based on current controlled oscillators (CCOs) allows a current-mode implementation with high noise-immunity and low-voltage compatibility. Thanks to the differential design nonlinearity impact on circuit performance is kept low. Moreover, the typical clock-jitter sensitivity for continuous time modulators is addressed by a switched shaped-current feedback DAC. The modulator implemented in 180 nm standard CMOS technology consumes 28μW and achieves an SNDR of 95dB at a signal bandwidth of 10 kHz and an oversampling ratio of 256.\",\"PeriodicalId\":188240,\"journal\":{\"name\":\"2015 22nd International Conference Mixed Design of Integrated Circuits & Systems (MIXDES)\",\"volume\":\"8 23-24\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2015-06-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"6\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2015 22nd International Conference Mixed Design of Integrated Circuits & Systems (MIXDES)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/MIXDES.2015.7208518\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2015 22nd International Conference Mixed Design of Integrated Circuits & Systems (MIXDES)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/MIXDES.2015.7208518","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A 96 dB SNDR current-mode continuous-time ΔΣ modulator for electrochemical sensor arrays
A low-voltage fully differential current-mode continuous time delta-sigma modulator is presented for application in electrochemical sensor arrays. Although a first order topology is realized by using a single differential integrator, second order noise shaping is achieved. A differential quantizer based on current controlled oscillators (CCOs) allows a current-mode implementation with high noise-immunity and low-voltage compatibility. Thanks to the differential design nonlinearity impact on circuit performance is kept low. Moreover, the typical clock-jitter sensitivity for continuous time modulators is addressed by a switched shaped-current feedback DAC. The modulator implemented in 180 nm standard CMOS technology consumes 28μW and achieves an SNDR of 95dB at a signal bandwidth of 10 kHz and an oversampling ratio of 256.
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