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Monday, December 29, 2014

Thesis on Image Sensor Noise

Shizuoka University, Japan published a PhD Thesis "A Study on Noise Reduction in CMOS Image Sensors using High-Gain Front-end Readout Circuits" by Mohd Amrallah bin Mustafa, dated by Aug. 2013. The thesis goes through a quick overview of the major noise sources, including RTN:


Then, thesis goes through the ways to reduce the noise, like correlated multiple sampling (CMS), high gain ADC combined with PGA, and Histogram-based RTN Suppression and Averaging (HRS):


Then, a pixel with two amplifiers is proposed, where a selection circuit chooses the least noisy amplifier out of the two:

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3 comments:

  1. Arnaud Darmont (aphesa)December 29, 2014 at 11:39 PM

    4.5T/pixel. Not bad.
    Does the sensor require a one bit calibration per pixel?

    ReplyDelete
  2. AnonymousDecember 30, 2014 at 10:34 AM

    Both conversion gain and QE are reduced this way but still, seems like effective method..

    ReplyDelete
  3. AnonymousApril 20, 2015 at 4:50 PM

    Hi,
    Does anyone know a free tool or open-source script which can be used to simulate or model noise (temporal and fixed), and other parameters of a cmos image sensor?

    ReplyDelete

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