公开(公告)号：US20190182445A1

公开(公告)日：2019-06-13

申请号：US16127553

申请日：2018-09-11

Applicant: Analog Devices Global Unlimited Company

Inventor： Daniel Peter CANNIFF ,  Edward C. GUTHRIE ,  Jonathan Ephraim David HURWITZ

IPC: H04N5/369 ,  H03M1/46 ,  H04N5/378

Abstract: Embodiments of the present disclosure provide ADCs particularly suitable for PDAF image sensors, which ADCs may have an increased speed and/or reduced design complexity and power consumption compared to conventional implementations. An example ADC for a PDAF image sensor is configured to implement modified SAR techniques which reduce the number of bit trials required for conversion, and enable increased number of samples in a row-conversion time period of the image sensor. The ADC may implement the modified SAR techniques in combination with CMS in pixel readout signal chain, which may reduce noise without a proportionate increase in ADC sample rate.