Circuits and methods for mitigating gradient effects in image sensors

The invention relates to a circuit and a method for mitigating gradient effects in an image sensor. An image sensor may include an array of pixels and associated delay calibration circuitry for determining an amount of delay of a row control signal. The delay calibration circuit may include: circuitry for generating a calibration row control signal; circuitry for propagating the calibration row control signal along a row of dummy pixels; and one or more sampling circuits coupled to one or more tap points in the row dummy pixels for monitoring when the calibration row control signal reaches the one or more tap points. The pixel array may output a signal during normal operation. The image sensor may include column readout circuitry for reading out the signals from the pixel array. The column readout circuit may be controlled using a gradually delayed sampling signal based on count values output from the one or more sampling circuits. 本公开涉及用于减轻图像传感器中梯度效应的电路和方法。一种图像传感器，该图像传感器可包括像素阵列以及用于确定行控制信号的延迟量的相关联延迟校准电路。该延迟校准