| 摘要 |
PROBLEM TO BE SOLVED: To provide an image sensing apparatus and an imaging system which can reduce the chip area and suppress an increase in power consumption even in reading out a pixel signal at a high speed. SOLUTION: An image sensing apparatus comprises a pixel including a photoelectric conversion unit, a column signal line connected to the pixel, a readout circuit for reading a signal out of the pixel via the column signal line, an output line connected to the readout circuit and having a capacitance, and an output unit for outputting an image signal in response to the signal from the readout circuit via the output line. The readout circuit includes a first accumulation unit for holding the signal outputted to the column signal line, a first opening/closing unit for opening/closing the connection with the first accumulation unit, a second accumulation unit, a transmission unit for transmitting to the second accumulation unit the signal held by the first accumulation unit, and a second opening/closing unit for opening/closing the connection of the transmission unit and the second accumulation unit. A capacitance of the first accumulation unit is smaller than a capacitance of the second accumulation unit, and the signal held by the second accumulation unit is read out to the output unit based on the capacitance of the second accumulation unit and the capacitance of the output line. COPYRIGHT: (C)2009,JPO&INPIT
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