摘要 |
An image sensor and a method for using the same are disclosed. The image sensor[40] includes an array of pixel sensors[41], a signal digitizing circuit[48], and a digitizing controller[53]. The array of pixel sensors includes a plurality of pixel sensors. Each pixel sensor includes a photodetector[46], a charge conversion circuit[34], and a gate transistor[36]. The charge conversion circuit generates a voltage signal that is related to a charge on the photodiode, and the gate transistor couples the voltage signal to a bit line[43] in response to a first signal. The signal digitizing circuit converts the voltage signal to a plurality of output digital values. Each output digital value has a different level of digitization noise. One of the output digital values is selected for output in response to an output selection signal that is generated by the digitizing controller. |