Patent ID: 9548755
Date: 2017-01-17
CPC Classifications: H03M

Claim:
1. An image sensor comprising: an array of pixels; and at least one analog-to-digital converter (ADC) configured for converting an analog pixel signal corresponding to photocarriers accumulated by a given selected pixel of the pixel array into an N bit digital signal, each said at least one analog-to-digital converter comprising: an input configured to sample the analog pixel signal; conversion circuitry configured (i) to begin analog-to-digital conversion of the analog pixel signal at said input prior to the analog pixel signal settling to within N-bit resolution, and (ii) to correct the analog-to-digital conversion for error caused by the analog-to-digital conversion beginning prior to the analog pixel signal at said input settling, such that the analog-to-digital conversion provides an output digital signal that accurately represents the analog pixel signal within N-bit resolution.