Patent ID: 8067720

Claim:
An image sensing device comprising: a pixel array in which a plurality of pixels are arrayed in a direction along a row and a direction along a column; a plurality of column amplification units, each of which includes a setting unit that sets an amplification factor therefor, and each of which amplifies, by the amplification factor set by the setting unit, the difference between a first signal and a second signal output at different timings from a pixel on a column in the pixel array to a column signal line or amplifies, by the set amplification factor, each of the first signal and the second signal; and a plurality of reference signal supply units, each of which outputs a first reference signal and a second reference signal to the column signal line at different timings, wherein the first reference signal and the second reference signal are common to a plurality of columns in the pixel array, wherein each of the plurality of column amplification units amplifies the difference between the first reference signal and the second reference signal to output the amplified difference, or amplifies each of the first reference signal and the second reference signal to output each of the amplified first reference signal and the amplified second reference signal, and wherein each setting unit sets an amplification factor for its column amplification unit, that is determined in accordance with a signal output from each of the plurality of column amplification units so as to reduce the variations between the amplification factors of the plurality of column amplification units.