A High-Precision Bandgap Voltage Reference with Automatic Curvature-Compensation Technique

被引：2
作者：
Zhou, Ze-kun [1 ,2 ]
Yu, Hongming [1 ,2 ]
Shi, Yue [1 ,2 ]
Wang, Zhuo [1 ,2 ]
Zhang, Bo [1 ,2 ]
机构：
[1] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, 4,Sect 2,North Jianshe Rd, Chengdu 610054, Peoples R China
[2] Chengdu Univ Informat Technol, Coll Commun Engn, 24,Block 1,Xuefu Rd, Chengdu 610225, Peoples R China
来源：
JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS | 2019年 / 28卷 / 13期
基金：
美国国家科学基金会;
关键词：
Automatic curvature-compensation technique; voltage reference; dynamic zero-temperature-coefficient point tracking; adaptive signal processing; digitization control; PPM/DEGREES-C; CMOS; NANOPOWER; SUB-1-V;
D O I：
10.1142/S0218126619502141
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
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. An exponential curvature-compensation method is first 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 (ZTCPT) 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. Verification results of the BGR proposed in this paper, which is implemented in 0.35-mu m BiCMOS process, illustrate that the TC of 1.4 ppm/degrees C is realized under the power supply voltage of 3 V and the power supply rejection of the proposed circuit is -65 dB without any filter capacitor.
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页数：12
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