{"title":"用于三电平δ - σ调制器的多通道抽取器","authors":"S. Bernadas, C. Thompson","doi":"10.1109/ICASSP.1994.389605","DOIUrl":null,"url":null,"abstract":"An 8-channel decimation filter, cascadable to 1024 channels, for use with a tri-level delta-sigma modulator (DSM) is described. The filter incorporates a least mean squares (LMS) adaptive correction algorithm to digitally correct the tri-level DSM input data. Additionally, digital offset and gain calibration features and output limiting circuitry reduce the requirements on the analog input to the DSM. The decimation ratio is 128 to 1 and the output data is 22 bits with an integrated floor of -116 dB. The filter coefficient design procedure was unique requiring both impulse response and frequency response optimization. LMS correction can improve the Signal-Noise Ratio by 40 dB.<<ETX>>","PeriodicalId":290798,"journal":{"name":"Proceedings of ICASSP '94. IEEE International Conference on Acoustics, Speech and Signal Processing","volume":"37 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1994-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":"{\"title\":\"A multi-channel decimator for a tri-level delta-sigma modulator\",\"authors\":\"S. Bernadas, C. Thompson\",\"doi\":\"10.1109/ICASSP.1994.389605\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"An 8-channel decimation filter, cascadable to 1024 channels, for use with a tri-level delta-sigma modulator (DSM) is described. The filter incorporates a least mean squares (LMS) adaptive correction algorithm to digitally correct the tri-level DSM input data. Additionally, digital offset and gain calibration features and output limiting circuitry reduce the requirements on the analog input to the DSM. The decimation ratio is 128 to 1 and the output data is 22 bits with an integrated floor of -116 dB. The filter coefficient design procedure was unique requiring both impulse response and frequency response optimization. LMS correction can improve the Signal-Noise Ratio by 40 dB.<<ETX>>\",\"PeriodicalId\":290798,\"journal\":{\"name\":\"Proceedings of ICASSP '94. IEEE International Conference on Acoustics, Speech and Signal Processing\",\"volume\":\"37 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1994-04-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"4\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Proceedings of ICASSP '94. IEEE International Conference on Acoustics, Speech and Signal Processing\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ICASSP.1994.389605\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of ICASSP '94. IEEE International Conference on Acoustics, Speech and Signal Processing","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICASSP.1994.389605","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A multi-channel decimator for a tri-level delta-sigma modulator
An 8-channel decimation filter, cascadable to 1024 channels, for use with a tri-level delta-sigma modulator (DSM) is described. The filter incorporates a least mean squares (LMS) adaptive correction algorithm to digitally correct the tri-level DSM input data. Additionally, digital offset and gain calibration features and output limiting circuitry reduce the requirements on the analog input to the DSM. The decimation ratio is 128 to 1 and the output data is 22 bits with an integrated floor of -116 dB. The filter coefficient design procedure was unique requiring both impulse response and frequency response optimization. LMS correction can improve the Signal-Noise Ratio by 40 dB.<>
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