A −40 ​°C–125 ​°C, 1.08 ​ppm/°C, 918 ​nW bandgap voltage reference with segmented curvature compensation
Yan,Tianzheng1,2,3; U,Chi Wa1,2,3; Law,Man Kay1,2,3; Lam,Chi Seng1,2,3
Source PublicationMicroelectronics Journal
AbstractThis paper proposes a precision bandgap voltage reference (BGR) with a segmented curvature compensation technique, demonstrating both small temperature coefficient (TC) and low power consumption. By segmenting the output voltage of a conventional first-order BGR over a wide temperature range and implementing compensation for each segment, the output reference voltage can be systematically aligned to an identical voltage level, effectively reducing the achievable TC. An additional circuit consists of comparators, logic gates, switches and current mirrors is proposed to achieve this compensation scheme, which also optimizes the overall BGR power consumption. Implemented and simulated in a standard 65 ​nm CMOS process, the proposed BGR achieves an average output of 496.17 ​mV and a TC of 1.08 ​ppm/°C from −40 ​°C to 125 ​°C. It consumes a current of 765 ​nA under a 1.2 ​V supply while exhibiting a line regulation of 0.725%/V with V from 1.0 to 1.8 ​V ​at 27 ​°C.
KeywordBandgap voltage reference Segmented curvature compensation Temperature coefficient (TC)
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Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.State Key Laboratory of Analog and Mixed-Signal VLSI,University of Macau,Macau,999078,China
2.Institute of Microelectronics,University of Macau,Macau,999078,China
3.Department of Electrical and Computer Engineering,Faculty of Science and Technology,University of Macau,Macau,999078,China
First Author AffilicationUniversity of Macau;  Faculty of Science and Technology
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GB/T 7714
Yan,Tianzheng,U,Chi Wa,Law,Man Kay,et al. A −40 ​°C–125 ​°C, 1.08 ​ppm/°C, 918 ​nW bandgap voltage reference with segmented curvature compensation[J]. Microelectronics Journal,2020,105.
APA Yan,Tianzheng,U,Chi Wa,Law,Man Kay,&Lam,Chi Seng.(2020).A −40 ​°C–125 ​°C, 1.08 ​ppm/°C, 918 ​nW bandgap voltage reference with segmented curvature compensation.Microelectronics Journal,105.
MLA Yan,Tianzheng,et al."A −40 ​°C–125 ​°C, 1.08 ​ppm/°C, 918 ​nW bandgap voltage reference with segmented curvature compensation".Microelectronics Journal 105(2020).
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