Patent ID: 8120681
Filing Date: 2012-02-21
Classification: H04N

Abstract:
1. An image sensing apparatus comprising: a pixel array in which a plurality of pixels are arrayed two-dimensionally; a selection unit which selects a readout row from which a signal is to be read out in the pixel array; a readout unit which reads out a signal from the readout row selected by the selection unit, and outputs a plurality of signals of each column on the readout row; and an output unit, wherein the output unit includes an output line group including a plurality of pairs, each of the pairs including a first output line which transfers a first signal output from the readout unit and a second output line which transfers a second signal output from the readout unit, a plurality of difference circuits which are arranged in correspondence with the plurality of pairs, each of the plurality of difference circuits generating a difference signal between the first signal and the second signal in the corresponding pair, a first dummy line where an electric potential is set to a floating state during at least a period in which the readout unit outputs the first signal and the second signal, and a second dummy line where an electric potential is set to a floating state during at least a period in which the readout unit outputs the first signal and the second signal, and wherein the output line group is interposed between the first dummy line and the second dummy line, the readout unit includes a plurality of memory circuits which hold signals of a plurality of columns on the readout row, adjacent memory circuits among the plurality of memory circuits are connected to different pairs, a gain determined by a ratio of a capacitance value of the first holding capacitance and a capacitance value of the first output line is applied to the first signal output to the first output line, and a gain determined by a ratio of a capacitance value of the second holding capacitance and a capacitance value of the second output line is applied to the second signal output to the second output line.