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Proceedings Paper

An 1.4 ppm/°C bandgap voltage reference with automatic curvature-compensation technique
Author(s): Zekun Zhou; Hongming Yu; Yue Shi; Bo Zhang
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Paper Abstract

A high-precision Bandgap voltage reference (BGR) with a novel curvature-compensation scheme is proposed in this paper. The temperature coefficient (TC) can be automatically optimized with a built-in adaptive curvature-compensation technique, which is realized in a digitization control way. Firstly, an exponential curvature compensation method is adopted to reduce the TC in a certain degree, especially in low temperature range. Then, the temperature drift of BGR in higher temperature range can be further minimized by dynamic zero-temperature-coefficient point tracking with temperature changes. With the help of proposed adaptive signal processing, the output voltage of BGR can approximately maintain zero TC in a wider temperature range. Experiment results of the BGR proposed in this paper, which is implemented in 0.35-μm BCD process, illustrate that the TC of 1.4ppm/°C is realized under the power supply voltage of 3.6V and the power supply rejection of the proposed circuit is -67dB.

Paper Details

Date Published: 19 December 2017
PDF: 5 pages
Proc. SPIE 10613, 2017 International Conference on Robotics and Machine Vision, 106130I (19 December 2017); doi: 10.1117/12.2300345
Show Author Affiliations
Zekun Zhou, Univ. of Electronic Science and Technology of China (China)
Hongming Yu, Univ. of Electronic Science and Technology of China (China)
Yue Shi, Chengdu Univ. of Information Technology (China)
Bo Zhang, Univ. of Electronic Science and Technology of China (China)


Published in SPIE Proceedings Vol. 10613:
2017 International Conference on Robotics and Machine Vision
Chiharu Ishii; Genci Capi; Jianhong Zhou, Editor(s)

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