{"title":"A high precision CMOS bandgap reference","authors":"Kaiyang Pan, Jianhui Wu, P. Wang","doi":"10.1109/ICASIC.2007.4415725","DOIUrl":null,"url":null,"abstract":"A high precision bandgap reference is presented. An exponential curvature compensation technique, which exploits the Ic-Vbe temperature characteristic of BJTs, is used to reduce the temperature coefficient (TC). A pre-regulator circuit is adopted to enhance the PSRR (power supply rejection ratio) performance. The bandgap uses the current mode approach to generate a reference voltage around 500 mV. With the conventional first-order compensation, the temperature coefficient is 14.6 ppm/degC over the range from -40degC to 85degC. Due to curvature compensation, an improved temperature drift of 7.04 ppm/degC is obtained. The PSRR of the reference voltage achieves 120 dB at low frequency.","PeriodicalId":120984,"journal":{"name":"2007 7th International Conference on ASIC","volume":"35 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2007 7th International Conference on ASIC","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICASIC.2007.4415725","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 5
Abstract
A high precision bandgap reference is presented. An exponential curvature compensation technique, which exploits the Ic-Vbe temperature characteristic of BJTs, is used to reduce the temperature coefficient (TC). A pre-regulator circuit is adopted to enhance the PSRR (power supply rejection ratio) performance. The bandgap uses the current mode approach to generate a reference voltage around 500 mV. With the conventional first-order compensation, the temperature coefficient is 14.6 ppm/degC over the range from -40degC to 85degC. Due to curvature compensation, an improved temperature drift of 7.04 ppm/degC is obtained. The PSRR of the reference voltage achieves 120 dB at low frequency.
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