{"title":"Design of a Fully Differential Gain-Boosted Folded-Cascode Op Amp with Settling Performance Optimization","authors":"Su Li, Qiu Yulin","doi":"10.1109/EDSSC.2005.1635302","DOIUrl":null,"url":null,"abstract":"A single stage fully differential operational amplifier was designed in SMIC 0.25um mix-signal CMOS technology with 2.5V power supply. The designed op amp utilizes gain-boosting technique. The main op amp is a fully differential folded-cascode op amp with switched-capacitor CMFB. Two fully differential folded-cascode op amps with continuous-time CMFBs are used as auxiliary op amps to increase the open-loop gain of the main op amp. In addition, a simulation-based optimization method for the high-speed design of gain-boosted op amp was also presented. The simulation results show that the designed op amp achieves a dc gain of 102dB with a unity-gain frequency of 822 MHz. With the high-speed optimization, the 0.0488% settling time is 3.5ns.","PeriodicalId":429314,"journal":{"name":"2005 IEEE Conference on Electron Devices and Solid-State Circuits","volume":" 5","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2005-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"19","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2005 IEEE Conference on Electron Devices and Solid-State Circuits","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/EDSSC.2005.1635302","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 19
Abstract
A single stage fully differential operational amplifier was designed in SMIC 0.25um mix-signal CMOS technology with 2.5V power supply. The designed op amp utilizes gain-boosting technique. The main op amp is a fully differential folded-cascode op amp with switched-capacitor CMFB. Two fully differential folded-cascode op amps with continuous-time CMFBs are used as auxiliary op amps to increase the open-loop gain of the main op amp. In addition, a simulation-based optimization method for the high-speed design of gain-boosted op amp was also presented. The simulation results show that the designed op amp achieves a dc gain of 102dB with a unity-gain frequency of 822 MHz. With the high-speed optimization, the 0.0488% settling time is 3.5ns.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
