TY - JOUR
T1 - Energy-harvesting circuits with a high-efficiency rectifier and a low temperature coefficient bandgap voltage reference
AU - Lee, Shuenn Yuh
AU - Liao, Zhan Xian
AU - Lee, Chih Hung
N1 - Funding Information:
Manuscript received October 10, 2018; revised January 5, 2019 and February 28, 2019; accepted March 12, 2019. Date of publication April 23, 2019; date of current version July 24, 2019. This work was supported in part by the Taiwan Semiconductor Research Institute, Ministry of Science and Technology (MOST) of Taiwan, under Grant MOST 107-2218-E-006-034, and in part by South Taiwan Smart Biomedical Industrial Clusters under Grant AZ-13-05-28-107. (Corresponding author: Shuenn-Yuh Lee.) S.-Y. Lee and Z.-X. Liao are with the Department of Electrical Engineering, National Cheng Kung University, Tainan 701, Taiwan (e-mail: ieesyl@mail.ncku.edu.tw). C.-H. Lee is with Macroblock, Hsinchu 30072, Taiwan.
Publisher Copyright:
© 1993-2012 IEEE.
PY - 2019/8
Y1 - 2019/8
N2 - In this paper, a high-efficiency rectifier and a low temperature coefficient (TC) bandgap voltage reference (BGR) in energy-harvesting circuits are presented. The audio signal generated from smartphone is used to verify the energy-harvesting circuits that are composed of a full-wave low-voltage active rectifier, a low-dropout (LDO) regulator, and a current-mode BGR circuit. An active diode and a proposed AVC are presented to enhance the rectifier efficiency. The rectifier output voltage is regulated by an LDO close to a stable 1.2-V supply voltage in a 0.18-\mu \text{m} 1P6M Taiwan Semiconductor Manufacturing Company standard complementary metal-oxide-semiconductor (CMOS) process. A curvature-compensation technique is proposed to improve the TC of the BGR, and the best TC of 15.33 ppm/°C between the temperature range of -10 °C and 120 °C is measured. The measured rectifier achieves the maximum power conversion efficiency (PCE) of 87.2% under 1.77~V{\mathrm {pp}} ac input signal with 2- \text{k}\Omega output load resistance. The measured results demonstrate the better characteristic of the rectifier and BGR than that of previous works using the low-power structure.
AB - In this paper, a high-efficiency rectifier and a low temperature coefficient (TC) bandgap voltage reference (BGR) in energy-harvesting circuits are presented. The audio signal generated from smartphone is used to verify the energy-harvesting circuits that are composed of a full-wave low-voltage active rectifier, a low-dropout (LDO) regulator, and a current-mode BGR circuit. An active diode and a proposed AVC are presented to enhance the rectifier efficiency. The rectifier output voltage is regulated by an LDO close to a stable 1.2-V supply voltage in a 0.18-\mu \text{m} 1P6M Taiwan Semiconductor Manufacturing Company standard complementary metal-oxide-semiconductor (CMOS) process. A curvature-compensation technique is proposed to improve the TC of the BGR, and the best TC of 15.33 ppm/°C between the temperature range of -10 °C and 120 °C is measured. The measured rectifier achieves the maximum power conversion efficiency (PCE) of 87.2% under 1.77~V{\mathrm {pp}} ac input signal with 2- \text{k}\Omega output load resistance. The measured results demonstrate the better characteristic of the rectifier and BGR than that of previous works using the low-power structure.
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U2 - 10.1109/TVLSI.2019.2908670
DO - 10.1109/TVLSI.2019.2908670
M3 - Article
AN - SCOPUS:85069960199
SN - 1063-8210
VL - 27
SP - 1760
EP - 1767
JO - IEEE Transactions on Very Large Scale Integration (VLSI) Systems
JF - IEEE Transactions on Very Large Scale Integration (VLSI) Systems
IS - 8
M1 - 8695865
ER -