Variable self-powered light detection CMOS chip with real-time adaptive tracking digital output based on a novel on-chip sensor | Zendy

Hong-Yi Wang | Zendy; Youyou Fan | Zendy; Zhijian Lu | Zendy; Tao Luo | Zendy; Houqiang Fu | Zendy; Hongjiang Song | Zendy; Yuji Zhao | Zendy; Jennifer Blain Christen | Zendy

Open Access

Variable self-powered light detection CMOS chip with real-time adaptive tracking digital output based on a novel on-chip sensor

Author(s) -

Hong-Yi Wang,

Youyou Fan,

Zhijian Lu,

Tao Luo,

Houqiang Fu,

Hongjiang Song,

Yuji Zhao,

Jennifer Blain Christen

Publication year - 2017

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.25.024138

Subject(s) - photodiode , effective number of bits , cmos , chip , computer science , tracking (education) , compensation (psychology) , voltage , image sensor , sensitivity (control systems) , electronic engineering , optics , electrical engineering , physics , engineering , telecommunications , artificial intelligence , psychology , pedagogy , psychoanalysis

This paper provides a solution for a self-powered light direction detection with digitized output. Light direction sensors, energy harvesting photodiodes, real-time adaptive tracking digital output unit and other necessary circuits are integrated on a single chip based on a standard 0.18 µm CMOS process. Light direction sensors proposed have an accuracy of 1.8 degree over a 120 degree range. In order to improve the accuracy, a compensation circuit is presented for photodiodes' forward currents. The actual measurement precision of output is approximately 7 ENOB. Besides that, an adaptive under voltage protection circuit is designed for variable supply power which may undulate with temperature and process.

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