{"title":"具有级联sigma-delta调制器的高性能d类放大器","authors":"C. Trehan, Kwong, Chao","doi":"10.1109/MWSCAS.2004.1353998","DOIUrl":null,"url":null,"abstract":"A topology for high performance of a class-D amplifier is proposed. The structural design consists of two sigma-delta modulator (SDM) stages in cascade with an intermediate decimation-filter between them. Noise and high tone introduced at the first stage are filtered out through the decimation-filter. The signal is converted to a 1-bit pulse duration modulation signal by the second stage SDM. The H-bridge is made part of the SDM loop, which not only enables the shaping of quantization noise but also stabilizes the output power switching stage.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"104 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2004-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":"{\"title\":\"A high performance class-D amplifier with cascaded sigma-delta modulators\",\"authors\":\"C. Trehan, Kwong, Chao\",\"doi\":\"10.1109/MWSCAS.2004.1353998\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A topology for high performance of a class-D amplifier is proposed. The structural design consists of two sigma-delta modulator (SDM) stages in cascade with an intermediate decimation-filter between them. Noise and high tone introduced at the first stage are filtered out through the decimation-filter. The signal is converted to a 1-bit pulse duration modulation signal by the second stage SDM. The H-bridge is made part of the SDM loop, which not only enables the shaping of quantization noise but also stabilizes the output power switching stage.\",\"PeriodicalId\":185817,\"journal\":{\"name\":\"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.\",\"volume\":\"104 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2004-07-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/MWSCAS.2004.1353998\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/MWSCAS.2004.1353998","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A high performance class-D amplifier with cascaded sigma-delta modulators
A topology for high performance of a class-D amplifier is proposed. The structural design consists of two sigma-delta modulator (SDM) stages in cascade with an intermediate decimation-filter between them. Noise and high tone introduced at the first stage are filtered out through the decimation-filter. The signal is converted to a 1-bit pulse duration modulation signal by the second stage SDM. The H-bridge is made part of the SDM loop, which not only enables the shaping of quantization noise but also stabilizes the output power switching stage.
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