An integrated circuit (IC) includes a photosensor array, some cells of which are reference cells that photosense throughout an application's energy range, while other cells of which are subrange cells that photosense within respective subranges. For example, the subrange cells can receive photons in...http://www.google.de/patents/US7291824?utm_source=gb-gplus-sharePatent US7291824 - Photosensing throughout energy range and in subranges
