Image sensing apparatus, image sensing apparatus control method, and imaging system

摘要

An image sensing apparatus comprises: an output unit which includes an output line group, a plurality of difference circuits, a first dummy line, and a second dummy line, and wherein the output line group is interposed between the first dummy line and the second dummy line, a readout unit includes a plurality of memory circuits, each of the plurality of memory circuits includes a first holding capacitance and a second holding capacitance, a gain determined by a ratio of a capacitance value of the first holding capacitance and a capacitance value of a 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 a second output line is applied to the second signal output to the second output line.

主权项

1. A method of controlling an image sensing apparatus including a pixel array having a plurality of pixels and column signal lines for outputting signals of the plurality of pixels, a readout unit which outputs first and second signals in accordance with signals output from selected pixels of the plurality of pixels via the column signal lines, and an output unit which outputs signals in accordance with the first and second signals output from the readout unit,
the output unit including an output line group including a plurality of pairs each of which includes a first output line for transferring the first signal output from the readout unit and a second output line for transferring the second signal output from the readout unit, a plurality of difference circuits each of which generates a difference signal between the first signal and the second signal corresponding to the pair of the first output line and the second output line, a first dummy line, and a second dummy line, the output line group being interposed between the first dummy line and the second dummy line, the readout unit including a memory block which holds the first and second signals, and a transfer block which transfers the first and second signals held by the memory block to the first and second output lines of the plurality of pairs of the output line group, the method comprising: a first step of controlling electric potentials of the first dummy line and the second dummy line to a floating state during a period in which the readout unit outputs the first signal and the second signal; and a second step of resetting electric potentials of the first dummy line and the second dummy line to a reset electric potential after the plurality of difference circuits output the difference signals.