PROGRAMMABLE REFERENCE VOLTAGE CALIBRATION DESIGN

摘要

An apparatus and method for determining a reference value for an imaging device, having a plurality of photosensitive pixels arranged in rows and columns, and having an active data portion and at least one row of pixels outside the active data portion. The method includes operating the at least one row for a predetermined integration time, applying a first reference value to the pixels ini the at least one row, reading out at least one pixel from the at least one row to obtain a first output value, applying a second reference value to the pixels in the at least one row; reading out at least one pixel from the at least one row to obtain a second output value, determining the reference value corresponding to an intended output; and applying the determined reference value to the active data portion of the imaging device.