Invention Grant
US08199235B2 Image sensing device and imaging system 有权
图像感测装置及成像系统

Image sensing device and imaging system
Abstract:
An image sensing device includes a pixel array in which a plurality of pixels are arrayed, and a plurality of column amplification units that amplify a plurality of signals that are output in parallel from the pixel array. Each of the column amplification units includes a differential amplifier including an amplification unit and a constant current circuit, with the amplification unit amplifying a signal that is output from the pixels and outputting the signal to an output node, and the constant current circuit being arranged between the amplification unit and a ground terminal and supplying a current to the amplification unit. Each amplification unit also includes a clip unit that clips a voltage of the output node when the differential amplifier amplifies the signal and thereby clipping a voltage of a connection node connecting the amplification unit to the constant current circuit in the differential amplifier.
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