Saturday, June 25, 2016

Samsung Proposes Different Readout Order to Reduce Column-to-Column ADC Coupling

Samsung Patent application US20160173800 "Image sensor for performing coupling-free readout, and device having the same" by Kyoung Min Koh, Ju Ha Kim, and Jae Cheol Yun talks about the coupling between the column-parallel ADCs:

"A coupling effect is generated between adjacent analog-to-digital converters by parasitic capacitance that is present between the adjacent analog-to-digital converters. In particular, the coupling effect which is increased as a difference between pixels signals becomes large increases non-linearity of each of analog-to-digital converters. The non-linearity is one of sources of errors of an analog-to-digital converter."

Samsung team proposes to change the pixel readout order so that the pixels with similar values read simultaneously:

Posted by Vladimir Koifman at 23:25

3 comments:

  1. K. ShimomuraJune 27, 2016 at 6:51 AM

    Interesting idea!
    But shutter-control metal-wirings become much complicated.. I hope the solution for shutter control also written in the patent.

    ReplyDelete
  2. Ivan OnuchinJune 27, 2016 at 5:06 PM

    Can someone make switching between R,G,B filter at every pixel at CFA?

    ReplyDelete
  3. Paul GallagherJune 28, 2016 at 8:45 PM

    Wasn't VLSI Vision doing this with their passive CMOS pixels in the 90's?

    ReplyDelete

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