Abstract
A readout circuit with on-sensor-chip two-dimensional interpolation. The readout circuit includes a plurality of readout units and at least one connection switch. The readout units read received brightness of the pixel units with the same color. Each of readout units includes at least one charge storage device in which stored charge is a received brightness sensed by a corresponding pixel unit. The switch couples the charge storage devices to share the charge between the coupled devices before the stored charge is read out. Thus, an xy-interpolation is carried out in analog domain.