UM
A 0.5-V Supply, 36 nW Bandgap Reference with 42 ppm/°C Average Temperature Coefficient Within-40 °c to 120 °c
Uu,Chi Wa1,2,3; Zeng,Wen Liang1,2,3; Law,Man Kay1,2,3; Lam,Chi Seng1,2,3; Martins,Rui Paulo1,2,3,4
2020-11-01
Source PublicationIEEE Transactions on Circuits and Systems I: Regular Papers
ISSN1549-8328
Volume67Issue:11Pages:3656-3669
AbstractThis paper presents a switched capacitor network (SCN)-based bandgap voltage reference (BGR) circuit designed and implemented in a 65nm standard CMOS process with a wide temperature range, high precision, low supply voltage and low power consumption for IoT device application. The proposed BGR employs a 2x charge pump with ripple optimization design to supply the VEB generator, which can relax VDD from 0.9V to 0.5V.A proportional to absolute temperature (PTAT) current source is proposed to bias the PNP BJT in order to reduce the nonlinearity of VEB. Moreover, a voltage divider SCN with low leakage consideration to form the complementary to absolute temperature (CTAT) voltage is designed to reduce the nonlinearity of its coefficient, while a series-parallel SCN with adjusted clock swing to form the PTAT voltage is designed to improve the line regulation of the BGR. The measurement result shows that the proposed BGR has a temperature coefficient (TC) of 42 ppm/°C at 0.5V supply within-40 °C to 120 °C. The line regulation is 3.2mV/V or 0.64%/V from 0.5V to 1V. Based on 6-chip test result, it shows a 3σ/μ variation of 3.08% before trimming, while 0.36% after trimming.
KeywordBandgap voltage reference low power low voltage switched capacitor circuits temperature coefficient
DOI10.1109/TCSI.2020.3010998
URLView the original
Language英语
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Cited Times [WOS]:2   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.State Key Laboratory of Analog and Mixed-Signal VLSI,University of Macau,999078,Macao
2.Institute of Microelectronics,University of Macau,999078,Macao
3.Department of Electrical and Computer Engineering,Faculty of Science and Technology,University of Macau,999078,Macao
4.Instituto Superior Técnico,Universidade de Lisboa,Lisbon,1049-001,Portugal
First Author AffilicationUniversity of Macau;  Faculty of Science and Technology
Recommended Citation
GB/T 7714
Uu,Chi Wa,Zeng,Wen Liang,Law,Man Kay,et al. A 0.5-V Supply, 36 nW Bandgap Reference with 42 ppm/°C Average Temperature Coefficient Within-40 °c to 120 °c[J]. IEEE Transactions on Circuits and Systems I: Regular Papers,2020,67(11):3656-3669.
APA Uu,Chi Wa,Zeng,Wen Liang,Law,Man Kay,Lam,Chi Seng,&Martins,Rui Paulo.(2020).A 0.5-V Supply, 36 nW Bandgap Reference with 42 ppm/°C Average Temperature Coefficient Within-40 °c to 120 °c.IEEE Transactions on Circuits and Systems I: Regular Papers,67(11),3656-3669.
MLA Uu,Chi Wa,et al."A 0.5-V Supply, 36 nW Bandgap Reference with 42 ppm/°C Average Temperature Coefficient Within-40 °c to 120 °c".IEEE Transactions on Circuits and Systems I: Regular Papers 67.11(2020):3656-3669.
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