{"title":"A high-performance CMOS modified amplifier","authors":"A. Dadashi, Y. Berg, O. Mirmotahari","doi":"10.1109/ISCE.2016.7797395","DOIUrl":null,"url":null,"abstract":"A new operational transconductance amplifier (OTA) based on the conventional triple folded cascode (TFC) structure is presented. Using the proposed positive feedback method, the dc-gain of the amplifier enhanced significantly. The simulation results for the designed OTA in a typical 0.35μm CMOS technology show more than 20dB dc-gain enhancement while bandwidth, output voltage swing range, and the phase margin characteristics are not affected to a great extent. Higher linearity in the higher output voltage swings is the main advantages of the proposed approach in comparison to the previously reported positive feedback methods.","PeriodicalId":193736,"journal":{"name":"2016 IEEE International Symposium on Consumer Electronics (ISCE)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2016 IEEE International Symposium on Consumer Electronics (ISCE)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ISCE.2016.7797395","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
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Abstract
A new operational transconductance amplifier (OTA) based on the conventional triple folded cascode (TFC) structure is presented. Using the proposed positive feedback method, the dc-gain of the amplifier enhanced significantly. The simulation results for the designed OTA in a typical 0.35μm CMOS technology show more than 20dB dc-gain enhancement while bandwidth, output voltage swing range, and the phase margin characteristics are not affected to a great extent. Higher linearity in the higher output voltage swings is the main advantages of the proposed approach in comparison to the previously reported positive feedback methods.
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