Active pixel sensor with sensing circuits and output circuits disposed on the same substrate

An active pixel sensor comprising:

• a substrate divided into a plurality of pixel rows, wherein a plurality of pixel areas are disposed on the plurality of pixel rows;
• a plurality of sensing circuits disposed in the pixel areas on the pixel rows excluding a specific pixel row among the plurality of pixel rows, wherein the plurality of sensing circuits are further disposed on a plurality of pixel columns to form an array, and each of the plurality of sensing circuits comprises a sensing element, a transfer transistor, and a floating diffusion node;
• and
• a plurality of output circuits disposed in the pixel areas on the specific pixel row,
• wherein the sensing circuits on the same pixel column are coupled to the same output circuit,
• wherein the sensing circuits on the same pixel column are coupled to the same output circuit through a connection line, and
• wherein in each sensing circuit, a first terminal of the sensing element is coupled to a ground, and a second terminal of the sensing element is coupled to a first node, a first terminal of the transfer transistor is coupled to the first node, a control terminal of the transfer transistor receives a scan signal, a second terminal of the transfer transistor is coupled to the floating diffusion node, and the floating diffusion node is coupled to the corresponding connection line.