{"title":"120nm CMOS operational amplifier with pseudo-cascodes and positive feedback","authors":"F. Schlogl, H. Zimmerman","doi":"10.1109/IWSOC.2003.1213048","DOIUrl":null,"url":null,"abstract":"A fully differential 3-stage operational amplifier in 0.12/spl mu/m digital CMOS technology achieving a differential gain in excess of 86dB is presented. This operational amplifier contains only regular-VTh transistors. It uses a pseudo-cascode input differential stage and a pseudo-cascoded load for the high gain. Positive feedback is primarily implemented for a good common-mode rejection. A transit frequency of 46 MHz and a phase margin of 66/spl deg/ at a /spl plusmn/0.6V supply and with a load of 10pF have been measured. The current consumption is less than 1.7mA in the temperature range from -40 to +80/spl deg/C.","PeriodicalId":259178,"journal":{"name":"The 3rd IEEE International Workshop on System-on-Chip for Real-Time Applications, 2003. Proceedings.","volume":"13 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2003-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"The 3rd IEEE International Workshop on System-on-Chip for Real-Time Applications, 2003. Proceedings.","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IWSOC.2003.1213048","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
A fully differential 3-stage operational amplifier in 0.12/spl mu/m digital CMOS technology achieving a differential gain in excess of 86dB is presented. This operational amplifier contains only regular-VTh transistors. It uses a pseudo-cascode input differential stage and a pseudo-cascoded load for the high gain. Positive feedback is primarily implemented for a good common-mode rejection. A transit frequency of 46 MHz and a phase margin of 66/spl deg/ at a /spl plusmn/0.6V supply and with a load of 10pF have been measured. The current consumption is less than 1.7mA in the temperature range from -40 to +80/spl deg/C.
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