{"title":"一种用于电容式麦克风传感器的低功率高动态范围σ - δ调制器","authors":"S. A. Jawed, M. Gottardi, A. Baschirotto","doi":"10.1109/RME.2007.4401828","DOIUrl":null,"url":null,"abstract":"An opamp time-multiplexed topology of a third- order SigmaDelta modulator is presented in this paper. This topology implements a third-order noise transfer-function using only two opamps by sharing one opamp between second and the third integrators of the modulator. The simulated results are comparable to a low-power modulator with three separate opamps. The proposed SigmaDelta modulator is designed for a silicon microphone front-end. In the audio-band (20-20 kHz), it features a dynamic range above 80 dB, consuming 90 muWatts with a supply voltage of 1.8 V.","PeriodicalId":118230,"journal":{"name":"2007 Ph.D Research in Microelectronics and Electronics Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2007-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"A low-power high dynamic-range sigma-delta modulator for a capacitive microphone sensor\",\"authors\":\"S. A. Jawed, M. Gottardi, A. Baschirotto\",\"doi\":\"10.1109/RME.2007.4401828\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"An opamp time-multiplexed topology of a third- order SigmaDelta modulator is presented in this paper. This topology implements a third-order noise transfer-function using only two opamps by sharing one opamp between second and the third integrators of the modulator. The simulated results are comparable to a low-power modulator with three separate opamps. The proposed SigmaDelta modulator is designed for a silicon microphone front-end. In the audio-band (20-20 kHz), it features a dynamic range above 80 dB, consuming 90 muWatts with a supply voltage of 1.8 V.\",\"PeriodicalId\":118230,\"journal\":{\"name\":\"2007 Ph.D Research in Microelectronics and Electronics Conference\",\"volume\":\"1 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2007-07-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2007 Ph.D Research in Microelectronics and Electronics Conference\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/RME.2007.4401828\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2007 Ph.D Research in Microelectronics and Electronics Conference","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/RME.2007.4401828","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A low-power high dynamic-range sigma-delta modulator for a capacitive microphone sensor
An opamp time-multiplexed topology of a third- order SigmaDelta modulator is presented in this paper. This topology implements a third-order noise transfer-function using only two opamps by sharing one opamp between second and the third integrators of the modulator. The simulated results are comparable to a low-power modulator with three separate opamps. The proposed SigmaDelta modulator is designed for a silicon microphone front-end. In the audio-band (20-20 kHz), it features a dynamic range above 80 dB, consuming 90 muWatts with a supply voltage of 1.8 V.
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