Patent ID: 11968467

Abstract:
A read circuit for an image sensor includes: a first analog-to-digital conversion unit configured to perform successive approximation high-bit analog-to-digital conversion on collected pixel data to obtain high-bit conversion data and residual pixel data; and a second analog-to-digital conversion unit electrically connected to the first analog-to-digital conversion unit and configured to perform single-slope low-bit analog-to-digital conversion on the residual pixel data to obtain low-bit conversion data, wherein a sum of a first conversion accuracy of the first analog-to-digital conversion unit and a second conversion accuracy of the second analog-to-digital conversion unit is equal to a preset conversion accuracy for the pixel data. In accordance with the read circuit, a high image conversion frame rate of the pixel data can be achieved with lower power consumption and less circuit area, and the conversion cycle of the pixel data is effectively shortened.