A Nyquist Rate Pixel Level ADC for CMOS Image Sensors

  title={A Nyquist Rate Pixel Level ADC for CMOS Image Sensors},
  author={ADC InDut Ranne and Codeword},
  • ADC InDut Ranne, Codeword
  • Published 2004
A Nyquist rate Multi-Channel Bit Serial (MCBS) ADC using successive comparisons is presented. The ADC is suited to pixel level implementation in a CMOS image sensor. It comprises a 1-bit comparator/latch pair per 4 pixels and a DAC/controller shared by all pixels. A CMOS 320 x 240 'sensor using the MCBS ADC is described. It achieves 8.9 x 8.9 pm pixel size at 25% fill factor in 0.35 pm CMOS technology. Measured INL/DNL for the ADC are 2.3/1.2 LSB at 8-bit. Gain/offset FPN due to ADC are 0.24%/0… CONTINUE READING
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