A 10mm3 Light-Dose Sensing IoT2 System With 35-To-339nW 10-To-300klx Light-Dose-To-Digital Converter
A 10mm3 Light-Dose Sensing IoT2 System With 35-To-339nW 10-To-300klx Light-Dose-To-Digital Converter
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具有 35 至 339nW 10 至 300klx 光剂量数字转换器的 10mm3 光剂量传感 IoT2 系统
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发表时间：
2019
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通讯作者：
D. Blaauw
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作者：
Inhee Lee;Eunseong Moon;Yejoong Kim;J. Phillips;D. Blaauw
本文介绍了一个10mm3的微型物联网（IoT2）系统，该系统使用定制光伏电池和光剂量-数字转换器（LDDC）测量光剂量。LDDC为温度稳定性消除二极管泄漏，并通过双正向偏置光伏电池创造无功率开销的净空空间。它还可以自适应地更新当前镜像比率和累积权重因子，以实现低且接近恒定的功耗。该系统可以在$\gt 500$ lx光级下自主运行。LDDC达到$\mathrm {a}3 \sigma $±3.8的误差% and $\sigma / \mu $ of 2.4% across a wide light intensity range from 10lx to 300klx while consuming only 35 – 339nW.
This paper presents a 10mm3 Internet-of-Tiny-Things (IoT2) system that measures light dose using custom photovoltaic cells and a light-dose-to-digital converter (LDDC). The LDDC nulls diode leakage for temperature stability and creates headroom without power overhead by dual forward-biased photovoltaic cells. It also adaptively updates the current mirror ratio and accumulation weighting factor for a low, near-constant power consumption. The system can operate energy-autonomously at $\gt 500$ lx light level. The LDDC achieves $\mathrm {a}3 \sigma $ inaccuracy of ±3.8% and $\sigma / \mu $ of 2.4% across a wide light intensity range from 10lx to 300klx while consuming only 35 – 339nW.