{"title":"自动校准调制/spl Sigma/-/spl Delta/频率合成器","authors":"D. McMahill, C. Sodini","doi":"10.1109/VLSIC.2001.934192","DOIUrl":null,"url":null,"abstract":"This paper describes a sigma-delta (/spl Sigma/-/spl Delta/) synthesizer for Gaussian frequency and minimum shift keying (GFSK/GMSK) modulation. The key innovation is an in-service automatic calibration circuit which tunes the phase locked loop (PLL) to compensate for process tolerance and temperature variation. The PLL, including 1.8 GHz voltage controlled oscillator (VCO), /spl Sigma/-/spl Delta/ modulator, and calibration circuit has been implemented in a 0.6 micron BiCMOS integrated circuit. The test chip achieves 2.5 Mbit/second using GFSK and 5.0 Mbit/second using 4-FSK.","PeriodicalId":346869,"journal":{"name":"2001 Symposium on VLSI Circuits. Digest of Technical Papers (IEEE Cat. No.01CH37185)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2001-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Automatic calibration of modulated /spl Sigma/-/spl Delta/ frequency synthesizers\",\"authors\":\"D. McMahill, C. Sodini\",\"doi\":\"10.1109/VLSIC.2001.934192\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This paper describes a sigma-delta (/spl Sigma/-/spl Delta/) synthesizer for Gaussian frequency and minimum shift keying (GFSK/GMSK) modulation. The key innovation is an in-service automatic calibration circuit which tunes the phase locked loop (PLL) to compensate for process tolerance and temperature variation. The PLL, including 1.8 GHz voltage controlled oscillator (VCO), /spl Sigma/-/spl Delta/ modulator, and calibration circuit has been implemented in a 0.6 micron BiCMOS integrated circuit. The test chip achieves 2.5 Mbit/second using GFSK and 5.0 Mbit/second using 4-FSK.\",\"PeriodicalId\":346869,\"journal\":{\"name\":\"2001 Symposium on VLSI Circuits. Digest of Technical Papers (IEEE Cat. No.01CH37185)\",\"volume\":\"10 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2001-06-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2001 Symposium on VLSI Circuits. Digest of Technical Papers (IEEE Cat. No.01CH37185)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/VLSIC.2001.934192\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2001 Symposium on VLSI Circuits. Digest of Technical Papers (IEEE Cat. No.01CH37185)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/VLSIC.2001.934192","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Automatic calibration of modulated /spl Sigma/-/spl Delta/ frequency synthesizers
This paper describes a sigma-delta (/spl Sigma/-/spl Delta/) synthesizer for Gaussian frequency and minimum shift keying (GFSK/GMSK) modulation. The key innovation is an in-service automatic calibration circuit which tunes the phase locked loop (PLL) to compensate for process tolerance and temperature variation. The PLL, including 1.8 GHz voltage controlled oscillator (VCO), /spl Sigma/-/spl Delta/ modulator, and calibration circuit has been implemented in a 0.6 micron BiCMOS integrated circuit. The test chip achieves 2.5 Mbit/second using GFSK and 5.0 Mbit/second using 4-FSK.