{"title":"A CMOS Variable Gain Amplifier with DC Offset Calibration Loop for Wireless Communications","authors":"Zhih-Siou Cheng, J. Bor","doi":"10.1109/VDAT.2006.258115","DOIUrl":null,"url":null,"abstract":"A 64 dB gain range VGA with DC offset calibration loop is proposed in this work. This VGA adopts the degeneration type amplifier to vary voltage gain and uses the super-source-follower input stage to enhance the linearity. A digital-based DC offset calibration loop is also designed to solve the DC offset problem. An experimental chip is fabricated in 0.18 mum process. With 2 dB step, the gain error is less than 0.8 dB and the output DC offset is less than 100mV at maximum gain setting. The total power consumption is 11 mW","PeriodicalId":356198,"journal":{"name":"2006 International Symposium on VLSI Design, Automation and Test","volume":"57 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2006-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"13","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2006 International Symposium on VLSI Design, Automation and Test","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/VDAT.2006.258115","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 13
Abstract
A 64 dB gain range VGA with DC offset calibration loop is proposed in this work. This VGA adopts the degeneration type amplifier to vary voltage gain and uses the super-source-follower input stage to enhance the linearity. A digital-based DC offset calibration loop is also designed to solve the DC offset problem. An experimental chip is fabricated in 0.18 mum process. With 2 dB step, the gain error is less than 0.8 dB and the output DC offset is less than 100mV at maximum gain setting. The total power consumption is 11 mW
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