PIXEL SENSOR CELL WITH HOLD NODE FOR LEAKAGE CANCELLATION AND METHODS OF MANUFACTURE AND DESIGN STRUCTURE

摘要

A reference pixel sensor cell (e.g., global shutter) with hold node for leakage cancellation, methods of manufacture and design structure is provided. A pixel array includes one or more reference pixel sensor cells dispersed locally throughout active light sensing regions. The one or more reference pixel sensor cells provides a reference signal used to correct for photon generated leakage signals which vary by locality within the active light sensing regions.

主权项

1. A method of compensating for leakage in a pixel array comprising:
providing a known voltage signal to a reference pixel sensor cell in proximity to an active pixel sensor cell; reading out an output voltage signal of the reference pixel sensor cell and calculating the leakage as a difference between the known voltage signal and the output voltage signal; and adding the calculated leakage to an output voltage signal of the active pixel sensor cell.