A CMOS self-powered monolithic light direction sensor with SAR ADC

Hongjiang Song, Zhijian Lu, Tao Luo, Jennifer Blain Christen, Hongyi Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

A light direction sensor, SAR ADC, and energy harvesting photodiodes are integrated on a single chip based fabricated in a 0.18 μm process. No external power supply is needed for the chip to operate. Micro-scale metal baffles create on-chip shadowing for sensing light direction. The frequency of the SAR ADC automatically varies adapting to the harvested power. A current compensation circuit is presented to improve the precision to 7 ENOB. In addition, the chip works when solar intensity is greater than 45 mW/cm2.

Original languageEnglish (US)
Title of host publicationInternational System on Chip Conference
EditorsRamalingam Sridhar, Danella Zhao, Kaijian Shi, Thomas Buchner
PublisherIEEE Computer Society
Pages58-62
Number of pages5
ISBN (Electronic)9781479933785
DOIs
StatePublished - Nov 5 2014
Event27th IEEE International System on Chip Conference, SOCC 2014 - Las Vegas, United States
Duration: Sep 2 2014Sep 5 2014

Publication series

NameInternational System on Chip Conference
ISSN (Print)2164-1676
ISSN (Electronic)2164-1706

Other

Other27th IEEE International System on Chip Conference, SOCC 2014
CountryUnited States
CityLas Vegas
Period9/2/149/5/14

Keywords

  • Light Direction Detection
  • Photo Sensor
  • SAR ADC
  • Self-Powered

ASJC Scopus subject areas

  • Hardware and Architecture
  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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