Abstract
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.
Original language | English (US) |
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Pages (from-to) | 24138-24147 |
Number of pages | 10 |
Journal | Optics Express |
Volume | 25 |
Issue number | 20 |
DOIs | |
State | Published - Oct 2 2017 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics