{"title":"用于闭环电流监测系统的快速沉降40db VGA设计","authors":"E. Azab, Tarek Eldahrawy, Y. Hegazy, K. Hofmann","doi":"10.1109/NEWCAS50681.2021.9462748","DOIUrl":null,"url":null,"abstract":"In this paper, a fast-settling Variable Gain Amplifier (VGA) with 40-dB linear-in-decibel gain tuning range is proposed. The VGA is used in a closed-loop current monitoring system and is designed using two cascaded gain cells. The first cell is responsible for the VGA tuning via voltage-to-current control circuit and external resistor with gain range of ±20dB. The second cell’s gain is fixed at 20dB; it is used to stabilize the VGA after adding the common-mode feedback circuit. The VGA is designed using 0.18pm XFAB SOI Technology. Circuit simulations showed that the VGA settling time is 34ns. The VGA’s HD3 is at −73.26dB and its OIP3 of −60dB at maximum gain setting. Comparison with previous work shows that the proposed VGA is faster and has better linearity.","PeriodicalId":373745,"journal":{"name":"2021 19th IEEE International New Circuits and Systems Conference (NEWCAS)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2021-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Design of Fast-Settling 40-dB VGA for Closed-loop Current Monitoring System\",\"authors\":\"E. Azab, Tarek Eldahrawy, Y. Hegazy, K. Hofmann\",\"doi\":\"10.1109/NEWCAS50681.2021.9462748\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In this paper, a fast-settling Variable Gain Amplifier (VGA) with 40-dB linear-in-decibel gain tuning range is proposed. The VGA is used in a closed-loop current monitoring system and is designed using two cascaded gain cells. The first cell is responsible for the VGA tuning via voltage-to-current control circuit and external resistor with gain range of ±20dB. The second cell’s gain is fixed at 20dB; it is used to stabilize the VGA after adding the common-mode feedback circuit. The VGA is designed using 0.18pm XFAB SOI Technology. Circuit simulations showed that the VGA settling time is 34ns. The VGA’s HD3 is at −73.26dB and its OIP3 of −60dB at maximum gain setting. Comparison with previous work shows that the proposed VGA is faster and has better linearity.\",\"PeriodicalId\":373745,\"journal\":{\"name\":\"2021 19th IEEE International New Circuits and Systems Conference (NEWCAS)\",\"volume\":\"64 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2021-06-13\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2021 19th IEEE International New Circuits and Systems Conference (NEWCAS)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/NEWCAS50681.2021.9462748\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2021 19th IEEE International New Circuits and Systems Conference (NEWCAS)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/NEWCAS50681.2021.9462748","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Design of Fast-Settling 40-dB VGA for Closed-loop Current Monitoring System
In this paper, a fast-settling Variable Gain Amplifier (VGA) with 40-dB linear-in-decibel gain tuning range is proposed. The VGA is used in a closed-loop current monitoring system and is designed using two cascaded gain cells. The first cell is responsible for the VGA tuning via voltage-to-current control circuit and external resistor with gain range of ±20dB. The second cell’s gain is fixed at 20dB; it is used to stabilize the VGA after adding the common-mode feedback circuit. The VGA is designed using 0.18pm XFAB SOI Technology. Circuit simulations showed that the VGA settling time is 34ns. The VGA’s HD3 is at −73.26dB and its OIP3 of −60dB at maximum gain setting. Comparison with previous work shows that the proposed VGA is faster and has better linearity.
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