{"title":"采用全差分CMOS触发器移相器的高精度正交调制器,适用于下一代射频收发器","authors":"T. Tsukahara","doi":"10.1109/RFIT49453.2020.9226237","DOIUrl":null,"url":null,"abstract":"In recent years, the number of wireless devices that use multi-level quadrature amplitude modulation (QAM) is increased, thereby requiring high-precision quadrature modulators composed of low-cost CMOS circuits. This paper first describes an architecture of a dual-local-oscillator (LO) switching quadrature mixer or modulator, thereby enabling high modulation accuracies. It features the compensation mechanism of phase errors of quadrature (I/Q) LO signals. This technique can be applied to digital modulation/demodulation and sideband or image-signal rejection in frequency conversion processes. Next, we propose a high-precision quadrature modulator, combining the dual-LO switching technique and a newly-proposed fully-differential CMOS flip-flop phase-shifter suitable for modern RF transceivers using multi-level QAM.","PeriodicalId":283714,"journal":{"name":"2020 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A High-Precision Quadrature Modulator Using a Fully-Differential CMOS Flip-Flop Phase-Shifter Suitable for the Next-Generation RF Transceivers\",\"authors\":\"T. Tsukahara\",\"doi\":\"10.1109/RFIT49453.2020.9226237\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In recent years, the number of wireless devices that use multi-level quadrature amplitude modulation (QAM) is increased, thereby requiring high-precision quadrature modulators composed of low-cost CMOS circuits. This paper first describes an architecture of a dual-local-oscillator (LO) switching quadrature mixer or modulator, thereby enabling high modulation accuracies. It features the compensation mechanism of phase errors of quadrature (I/Q) LO signals. This technique can be applied to digital modulation/demodulation and sideband or image-signal rejection in frequency conversion processes. Next, we propose a high-precision quadrature modulator, combining the dual-LO switching technique and a newly-proposed fully-differential CMOS flip-flop phase-shifter suitable for modern RF transceivers using multi-level QAM.\",\"PeriodicalId\":283714,\"journal\":{\"name\":\"2020 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT)\",\"volume\":\"69 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2020-09-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2020 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/RFIT49453.2020.9226237\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2020 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/RFIT49453.2020.9226237","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A High-Precision Quadrature Modulator Using a Fully-Differential CMOS Flip-Flop Phase-Shifter Suitable for the Next-Generation RF Transceivers
In recent years, the number of wireless devices that use multi-level quadrature amplitude modulation (QAM) is increased, thereby requiring high-precision quadrature modulators composed of low-cost CMOS circuits. This paper first describes an architecture of a dual-local-oscillator (LO) switching quadrature mixer or modulator, thereby enabling high modulation accuracies. It features the compensation mechanism of phase errors of quadrature (I/Q) LO signals. This technique can be applied to digital modulation/demodulation and sideband or image-signal rejection in frequency conversion processes. Next, we propose a high-precision quadrature modulator, combining the dual-LO switching technique and a newly-proposed fully-differential CMOS flip-flop phase-shifter suitable for modern RF transceivers using multi-level QAM.