{"title":"高精度双向斩波放大器，扩展共模输入电压范围","authors":"Nicusor Bortun, Matei Nicolae Stan, G. Brezeanu","doi":"10.1109/SMICND.2015.7355237","DOIUrl":null,"url":null,"abstract":"This paper presents a chopper amplifier for precision current sensing, capable of handling common mode input voltages outside the supply rails. For high common mode rejection ratio (CMRR) and DC gain, the amplifier employs a three-stage topology with nested-Miller frequency compensation. By using the chopping technique, a referred to input offset voltage of ±90μV is obtained. To reduce the output ripples caused by the chopping technique the amplifier employs a notch filter. A CMRR of 123dB has been obtained, considering a supply voltage of 5V, for a common mode input voltage range from 4V to 80V. The stability of the operational amplifier (OA) is ensured for a minimum closed loop gain of 20V/V.","PeriodicalId":325576,"journal":{"name":"2015 International Semiconductor Conference (CAS)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":"{\"title\":\"High precision bidirectional chopper amplifier with extended common mode input voltage range\",\"authors\":\"Nicusor Bortun, Matei Nicolae Stan, G. Brezeanu\",\"doi\":\"10.1109/SMICND.2015.7355237\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This paper presents a chopper amplifier for precision current sensing, capable of handling common mode input voltages outside the supply rails. For high common mode rejection ratio (CMRR) and DC gain, the amplifier employs a three-stage topology with nested-Miller frequency compensation. By using the chopping technique, a referred to input offset voltage of ±90μV is obtained. To reduce the output ripples caused by the chopping technique the amplifier employs a notch filter. A CMRR of 123dB has been obtained, considering a supply voltage of 5V, for a common mode input voltage range from 4V to 80V. The stability of the operational amplifier (OA) is ensured for a minimum closed loop gain of 20V/V.\",\"PeriodicalId\":325576,\"journal\":{\"name\":\"2015 International Semiconductor Conference (CAS)\",\"volume\":\"61 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2015-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2015 International Semiconductor Conference (CAS)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/SMICND.2015.7355237\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2015 International Semiconductor Conference (CAS)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/SMICND.2015.7355237","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
High precision bidirectional chopper amplifier with extended common mode input voltage range
This paper presents a chopper amplifier for precision current sensing, capable of handling common mode input voltages outside the supply rails. For high common mode rejection ratio (CMRR) and DC gain, the amplifier employs a three-stage topology with nested-Miller frequency compensation. By using the chopping technique, a referred to input offset voltage of ±90μV is obtained. To reduce the output ripples caused by the chopping technique the amplifier employs a notch filter. A CMRR of 123dB has been obtained, considering a supply voltage of 5V, for a common mode input voltage range from 4V to 80V. The stability of the operational amplifier (OA) is ensured for a minimum closed loop gain of 20V/V.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
