CMOS IMAGE SENSOR AND OPERATION METHOD THEREOF

摘要

A CMOS image sensor and an operation method thereof are disclosed. According to an embodiment of the present invention, the CMOS image sensor includes a current-voltage conversion transistor and a photodiode and the current-voltage conversion transistor can be maintained in a state capable of generating a gate induction drain leakage current while the photodiode absorbs light and generates a light current. The gate induction drain leakage current can be induced from the current-voltage conversion transistor as much as the photocurrent of the photodiode by connecting the photodiode with the current-voltage transistor. The current-voltage conversion transistor is able to generate a voltage which corresponds to the gate induction drain leakage current in a drain.