An 84 pW/frame per pixel current-mode CMOS image sensor with energy harvesting capability

Fang Tang, Amine Bermak

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

In this paper, we present an ultra-low-power current-mode image sensor with energy harvesting capability. By biasing the in-pixel transconductance amplifier in triode region and using a pipelined 9-bit current-mode analog-to-digital converter (ADC), a power consumption as low as 84 pW/frame per pixel is achieved. Besides the ultra-low-power feature, the proposed 6T pixel can also be used as a solar cell by reconfiguring the in-pixel P +Nwell photodiode, which can generate several micro watt power at Klux illumination levels. As a result, this energy harvesting imager is very suitable for wireless image sensor network applications. The test chip with a 128 × 96 pixel array resolution is fabricated using a 0.35 μ m CMOS technology. The random noise and the fixed pattern noise (FPN) in dark are 0.4% and 1%, respectively. In the energy harvesting mode, 4.85 μW power can be harvested using the reconfigurable pixel array.

Original languageEnglish
Article number5742671
Pages (from-to)720-726
Number of pages7
JournalIEEE Sensors Journal
Volume12
Issue number4
DOIs
Publication statusPublished - 2012
Externally publishedYes

Fingerprint

Energy harvesting
Image sensors
CMOS
Pixels
pixels
sensors
energy
Triodes
triodes
analog to digital converters
Transconductance
transconductance
Digital to analog conversion
random noise
Photodiodes
Sensor networks
photodiodes
Solar cells
Electric power utilization
amplifiers

Keywords

  • Active pixel sensor (APS)
  • CMOS image sensor
  • current-mode
  • energy harvest
  • low-power

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Instrumentation

Cite this

An 84 pW/frame per pixel current-mode CMOS image sensor with energy harvesting capability. / Tang, Fang; Bermak, Amine.

In: IEEE Sensors Journal, Vol. 12, No. 4, 5742671, 2012, p. 720-726.

Research output: Contribution to journalArticle

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