Abstract:
본발명에따른이미지센서는, 밀러효과를통해소스폴로워증폭기로동작하는드라이브트랜지스터의입력캐패시턴스를감소시켜변환이득을증가시킬수 있다. 이를위해, 센싱노드와메탈콘택사이를격리시켜이들간의기생캐패시턴스를최소화하도록배치한다. 출력라인과센싱노드사이의캐패시터는소스폴로워증폭기의피드백캐패시터로작용하며, 상기기생캐패시턴스를상쇄시킬수 있다.
Abstract:
PURPOSE: A CMOS image sensor is provided to improve sensitivity by increasing a transducer gain. CONSTITUTION: A photodiode outputs an optical charge by converting a received optical signal. A sensing node(17) senses the optical charge. A driving circuit converts the optical charge into an electric signal. The driving circuit includes one or more conductive contacts adjacent to the sensing node. An output line(18) is connected with the driving circuit to output the electric signal.
Abstract:
PURPOSE: A unit image sensor for compensating for leaked light, an image sensor array made of the unit image sensor, and a method for compensating for leaked light of the image sensor array are provided to compensate for leaked light currents remaining a storage diode configuring a normal image sensor array. CONSTITUTION: A unit image sensor receives light(LIGHT) from a backside area(DEEP PD1,DEEP PD2). Charges generated in the backside area are transferred to the storage diode through several processes. A global shutter step transfers signals which are optically converted from all photo diodes into a floating diffusion area. An electrical signal corresponding to charges transferred to the floating diffusion area is outputted by a line unit.