現今，CMOS邏輯技術將感測器與電路整合於單一晶片中，使得晶片的製作成本、耗電量及晶片大小皆能有大幅度降低，進而能廣泛應用在行動裝置上。隨著行動裝置與穿戴裝置的進步與普級，應用於裝置上的環境感測器需求也逐漸提高。其中，對於色光的感測於螢幕顯示、拍照、感測環境光源等應用上皆是相當重要的一環。
感測電路中皆需要參考準位作為比較值，提供電路做判定或是校正。目前的感測電路，大多使用一個電容來儲存參考準位。然而，電容為一種揮發性的元件，漏電時間過長會導致參考準位失準，此問題可以利用定時充電修正參考準位或是加大電容來延長儲存時間，但兩種方式皆需要額外的面積，且在晶片電源關閉後，參考準位將會流失。
本論文提出一個由不同深度的接面二極體、P型通道記憶體及周邊電路所組成的色光感測架構。此色光感測架構經由負回授的方式將參考準位儲存於P型通道記憶體中，因此不需要額外給予參考電壓，而P型通道記憶體為一種非揮發性的記憶體，參考準位即使在電源關閉後仍能持續保存。此色光感測器完全相容於CMOS邏輯製程，P型通道記憶體能長期儲存參考準位、降低電量消耗。未來，相當適合應用於行動電子產品中，也可以與無線環境感測技術結合。

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