本篇論文呈現一個嶄新的超低功率電流模式環境光感應器，主要應用於消費性電子產品中做為調節電源之用，另外本感應器的優異特性可提供廣泛佈署感應器節點系統之應用。本感應器可在非常低的供給電壓(<1.2V)下操作，以達到超低功率的需求，此外感應器的輸出不受到供給電壓改變而變動，具備高供給電壓適應性，這是因為本設計利用漸進式逼近暫存器結合累進放大倍率的電流鏡做類比數位轉化，電流模式操作不需要類比數位轉換電路的電容陣列，可避免充放電容所需的能量消耗，且有效的節省電路的面積，因應室內或室外感測的需求，可藉由改變本感應器的操作頻率調整感應範圍。基於以上特性，此電流模式的設計適合消費性電子產品應用，也可適應無線環境感應器模組的嚴格硬體需求。

This work presents a novel current mode ultra low power ambient light sensor for distributed sensor node application. Thissensor features minimum supply voltage (<1.2V) for meeting the low power requirement, by a successive approximation register logic combined with progressive sizing current mirrors for analog-to-digital conversion, The current-mode operation simplifies the ADC circuit by eliminating the capacitors array, which further reduces its power consumption. Furthermore, controlling theadjustable dynamic range for indoor or outdoor sensing can be obtained by clock frequency. This current mode sensor provides a promising solution for distributed environmental sensing modulesunder tight energy budgets.

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