PTC-Based Sigma-Delta ADCs For High-Speed, Low-Noise Imagers

This paper presents a novel column-parallel readout circuit for image sensors based on incremental-sigma-delta (ISD) ADCs. The excessive number of clock cycles needed per conversion is addressed. We apply the Photon Transfer Curve (PTC) based conversion to a second-order ISD ADC, achieving a 2.75x clock cycles reduction when compared to a standard secondorder ISD ADC while maintaining a similar noise performance. This results in the reduction of the pixel readout time and of the size of the digital filter.

Publication year:2014

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BOF-publication weight:1

CSS-citation score:1

Authors from:Private, Higher Education

Accessibility:Open