| 摘要 |
<p>An apparatus (1) includes a pixel array (PA) in which pixels (100) for outputting an analog signal are arranged in a matrix, vertical output lines (106) each connected to pixels in a same column, A/D converting means (124), which are individually connected to the vertical output lines, for converting the analog signal into a digital signal, and constant current supplying means (140) for supplying a constant current to the A/D converting means. The A/D converting means includes integrating means (125) for integrating the constant current, comparing means (126) for comparing the integrated constant current with the analog signal and outputting a comparison signal, and digital signal storing means (127) for storing a digital signal corresponding to the comparison signal. The integrating means includes an input capacitor (116) for receiving the constant current. The comparing means is connected to the constant current supplying means via the input capacitor.</p> |
