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本文提出了一种基于商用N型IGZO柔性技术的贴片式光感测系统，通过复用RF信号实现能量采集和反向散射通信，并复用电阻作为光传感器。通过电压调节、信号放大、数据转换和伪动态逻辑等低功耗技术，在2.02mm²面积内实现约15.5μW的室内光感测和0.9GHz数据传输。
Abstract A sticker-like light sensing system is demonstrated in flexible N type-only IGZO TFT. It reuses RF signals for harvested battery charging and backscattered communications, and repurposes resistors as light sensors. Low-power operation is enabled by techniques for state-of-the-art efficiency in voltage regulation, signal amplification, data conversion and pseudo-dynamic logic. Indoor light sensing and 0.9GHz data transmission are demonstrated with 2.02mm2 area at 15.5μW (<1% duty cycle). The quest for thin and conformable electronics fuels the demand for flexible systems based on IGZO thin-film transistors (TFTs) [1]-[3] in lightweight, bendable and low-cost wearable/patchable wireless sensing systems [4]-[6]. However, the large process minimum feature size and the absence of complementary transistors (N type-only) and other basic devices (e.g., accessible pn junctions) make flexible system integration challenging in
Marco Privitera1,2, Muhammad Zahid Naveed1, Andrea Ballo1,2, Gianluca Giustolisi1, Alfio Dario Grasso1, Massimo Alioto2
University of Catania, Catania, Italy, 2National University of Singapore, Singapore, Singapore