Power supply noise processing circuit and processing method, reading circuit and image sensor

The invention relates to a power supply noise processing circuit, a power supply noise processing method, a reading circuit and an image sensor. The power supply noise processing circuit comprises a ramp voltage signal generator and a comparator connected with the ramp voltage signal generator. The slope voltage signal generator outputs a slope voltage signal Vramp and a first fixed voltage signalVrampc, the generation mechanism of the Vramp is the same as the generation mechanism of the Vrampc, and the voltage value of the Vrampc is a first fixed value; the Vramp is input to a first input end of the comparator, and output signals of a single column of pixels in the pixel array and the Vrampc are respectively input to a second input end of the comparator. 本公开涉及一种电源噪声处理电路和处理方法、读出电路及图像传感器。所述电源噪声处理电路包括：斜坡电压信号发生器和与所述斜坡电压信号发生器相连的比较器；所述斜坡电压信号发生器输出斜坡电压信号Vramp和第一固定电压信号Vrampc，所述Vramp的产生机制和所述Vrampc的产生机制相同，所述Vrampc的电压值为第一固定值；所述Vramp输入到所述比较器的第一输入端，像素阵列中单列像素的输出信号以及所述Vrampc分别输入到所述比较器的第二输入端。