Current mode image sensor with two transistors per pixel

Viktor Gruev, Zheng Yang, Jan Van Der Spiegel, Ralph Etienne-Cummings

Research output: Contribution to journalArticlepeer-review


A linear current mode active pixel sensor for low fixed-pattern noise imaging is presented. The photo pixel is composed of a photodiode, a reset transistor, and a transconductance amplifier transistor. The address switch transistor is placed outside the pixel. The increased linearity of the pixel current coupled with current mode difference double sampling greatly reduces spatial variations across the image sensor array. The fabricated image sensor is composed of an array of 50 × 128 pixels and consumes 5 mW at 30 fps. Column fixed pattern noise of 0.1% from the saturated current and signal to noise ratio of 43.3 dB is achieved.

Original languageEnglish (US)
Article number5340553
Pages (from-to)1154-1165
Number of pages12
JournalIEEE Transactions on Circuits and Systems I: Regular Papers
Issue number6
StatePublished - 2010
Externally publishedYes


  • Focal plane image sensors
  • Image sensors
  • Linear response
  • Low power sensors

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Hardware and Architecture


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