带隙基准
温度系数
电压
电压基准
材料科学
CMOS芯片
比较器
共栅
电源抑制比
大气温度范围
电气工程
功率(物理)
拓扑(电路)
电子工程
光电子学
物理
跌落电压
工程类
放大器
量子力学
气象学
作者
U Chi-Wa,Cong Liu,Rui P. Martins,Chi-Seng Lam
出处
期刊:IEEE Transactions on Circuits and Systems I-regular Papers
[Institute of Electrical and Electronics Engineers]
日期:2023-12-01
卷期号:70 (12): 4755-4766
标识
DOI:10.1109/tcsi.2023.3301736
摘要
This paper presents a segmented curvature-compensated bandgap voltage reference (BGR) with low temperature coefficient (TC) and power consumption across a wide temperature range. In this work, we achieve temperature segmentation by comparing voltage instead of current, as in the conventional method, significantly reducing power consumption. Furthermore, we examine the trade-off between TC and power consumption, focusing on optimizing the number of temperature segments. In the core circuit, we utilize a regulated cascode current mirror to minimize channel length modulation induced error existing in the current-based BGR topology. We also introduce a replica structure to prevent oscillation and design comparators with the hysteresis characteristic to address noise influence. The proposed BGR, implemented in 65 nm CMOS, occupies an active area of 0.058 mm2. Measurement results of 6 chips show that the achieved reference voltage of 431.3 mV under 1 V supply has the best TC of 8.7 ppm/°C over a temperature range of −40 °C to 90 °C, consuming 740 nW at 20 °C.
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