{"title":"Improvement of the Gain Accuracy of the Instrumentation Amplifier Using a Very High Gain Operational Amplifier","authors":"Maitraiyee Konar, R. Sahu, S. Kundu","doi":"10.1109/DEVIC.2019.8783414","DOIUrl":null,"url":null,"abstract":"This paper evaluates the performance of three operational amplifier (Op-Amp) based instrumentation amplifier (INA) topology using two variants of Op-Amp - one with a very high gain with respect to the other Op-Amp topology. The gain accuracy and common mode rejection ratio (CMRR) of the INA is improved with the use of the very high gain Op-Amp designed using a folded cascode amplifier. The CMRR of the INA using folded cascade Op-Amp is 114 dB which is 43 dB higher to that of INA using differential amplifier.","PeriodicalId":294095,"journal":{"name":"2019 Devices for Integrated Circuit (DevIC)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"14","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2019 Devices for Integrated Circuit (DevIC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/DEVIC.2019.8783414","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 14
Abstract
This paper evaluates the performance of three operational amplifier (Op-Amp) based instrumentation amplifier (INA) topology using two variants of Op-Amp - one with a very high gain with respect to the other Op-Amp topology. The gain accuracy and common mode rejection ratio (CMRR) of the INA is improved with the use of the very high gain Op-Amp designed using a folded cascode amplifier. The CMRR of the INA using folded cascade Op-Amp is 114 dB which is 43 dB higher to that of INA using differential amplifier.
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