{"title":"Low-power, enhanced-gain adaptive-biasing-based Operational Transconductance Amplifiers","authors":"T. Cao, D. Wisland, T. Lande, F. Moradi","doi":"10.1109/NORCHP.2009.5397853","DOIUrl":null,"url":null,"abstract":"A symmetrical PMOS OTA (Operational Transconductance Amplifier) is used to build an advanced rail-to-rail amplifier with improved DC-gain and reduced power consumption. By using the adaptive biasing circuit for two differential inputs, a low stand-by current can be achieved, reducing power consumption, while the DC-gain of the proposed OTA is improved by adding a partial feedback loop. Simulation shows that the OTA has a low static power consumption of 57.6 µW and a high FoM of 5.13 [(V/µs.pF)/µW] for a load capacitor of 10pF. The circuit is designed in a STM 90nm CMOS process.","PeriodicalId":308859,"journal":{"name":"2009 NORCHIP","volume":"13 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"16","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2009 NORCHIP","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/NORCHP.2009.5397853","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 16
Abstract
A symmetrical PMOS OTA (Operational Transconductance Amplifier) is used to build an advanced rail-to-rail amplifier with improved DC-gain and reduced power consumption. By using the adaptive biasing circuit for two differential inputs, a low stand-by current can be achieved, reducing power consumption, while the DC-gain of the proposed OTA is improved by adding a partial feedback loop. Simulation shows that the OTA has a low static power consumption of 57.6 µW and a high FoM of 5.13 [(V/µs.pF)/µW] for a load capacitor of 10pF. The circuit is designed in a STM 90nm CMOS process.