Monday, May 09, 2016

CCD vs CMOS Infographic

CEI-Europe posts a nice iconographic comparing CCD with CMOS sensor. As it's too large to post it here, there are just few cuts:


Thanks to AL for the link!
Posted by Vladimir Koifman at 22:50

8 comments:

  1. Eric R FossumMay 10, 2016 at 1:36 AM

    I do find this amusing. BTW, the comment about CMOS and TDI is incorrect. Photon-counting image sensors in CMOS (esp. the ones without avalanche) with deep sub-electron read noise (say 0.25e- rms and lower) will allow TDI in any track direction -- so better than CCD most likely.

    ReplyDelete
    Replies
    1. YangNIMay 10, 2016 at 3:04 PM

      Not true ! The important thing in TDI is the dynamic MTF which is optimal when the signal charge moves in smooth way. This can be approximatively true in CCD but not in CMOS. The signal deplacement in CMOS is a saccaded, so the MTF will be considerably degraded even the readout noise is not an issue.

      Delete
    2. Albert TheuwissenMay 10, 2016 at 7:15 PM

      Eric, can I buy such a device ? Not to my knowledge ... For sure in the future more and better devices will show up, but as of today ???

      Delete
    3. Eric R FossumMay 10, 2016 at 8:00 PM

      @Yang, I think the "smoother" charge motion is a minor feature of TDI. The main thing is time-delay and integration. QIS, with subdiffraction limit pixels (jots) and oversampled in time probably will look smoother than CCD anyway.

      @Albert, the chart says "change to CMOS unlikely" relative to TDI. Sounds quite definitive, and wrong.

      Delete
    4. Albert TheuwissenMay 10, 2016 at 9:32 PM

      I am happy to change my mind once we get in products. BTW, the word "wrong" is also very definitive ;-)

      Delete
  2. AnonymousMay 10, 2016 at 11:26 AM

    Time to use embedded CCD in CMOS ;-)

    Pierre Boulenc

    ReplyDelete
    Replies
    1. AnonymousMay 11, 2016 at 12:54 PM

      "Time to use embedded CCD in CMOS ;-)"
      Not so easy and economical. The issue is that higher voltages (and heavy process optimizations) would still be required for fully-depleted operation/ excellent charge transfer. So after optimization, you would either end-up with a superior CCD channel with incompatibility with CMOS; or a CMOS compatible CCD structure that has mediocre detection performance.

      Delete
  3. RobMay 16, 2016 at 9:26 AM

    This might be of interest, CCD-CMOS TDI by Imec: http://image-sensors-world.blogspot.ca/2016/05/imec-publishes-combined-ccd-cmos-tdi.html?m=0

    ReplyDelete

All comments are moderated to avoid spam and personal attacks.

Subscribe to: Post Comments (Atom)