A low-power energy-harvesting logarithmic CMOS image sensor with reconfigurable resolution using two-level quantization scheme

M. K. Law, Amine Bermak, C. Shi

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

In this brief, a CMOS image sensor that exploits the possibility of reconfiguring pixel photodiodes for energy harvesting for wireless image sensor applications is proposed. Based on the logarithmic sensor architecture, each pixel photodiode of the proposed sensor array can be configured into either photosensing or energy-harvesting element to accomplish image-capturing or energy-harvesting purpose, respectively. An addressing scheme for reduced resolution readout and improved energy-harvesting efficiency, and a two-level quantization scheme for reduced readout dynamic power consumption are also proposed.

Original languageEnglish
Article number5713245
Pages (from-to)80-84
Number of pages5
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Volume58
Issue number2
DOIs
Publication statusPublished - Feb 2011
Externally publishedYes

Fingerprint

Energy harvesting
Image sensors
Photodiodes
Pixels
Sensor arrays
Electric power utilization
Sensors

Keywords

  • Energy harvesting
  • low-power CMOS image sensor
  • reconfigurable resolution
  • two-level quantization

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

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AB - In this brief, a CMOS image sensor that exploits the possibility of reconfiguring pixel photodiodes for energy harvesting for wireless image sensor applications is proposed. Based on the logarithmic sensor architecture, each pixel photodiode of the proposed sensor array can be configured into either photosensing or energy-harvesting element to accomplish image-capturing or energy-harvesting purpose, respectively. An addressing scheme for reduced resolution readout and improved energy-harvesting efficiency, and a two-level quantization scheme for reduced readout dynamic power consumption are also proposed.

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