| 摘要 |
A scanner, including a photoelectric conversion element photoelectrically converting light reflected from an original image to form an image signal; a timing generation circuit generating a drive signal for the photoelectric conversion element; a drive circuit driving the photoelectric conversion element; a signal processing circuit subjecting a sample hold signal fed in through the drive circuit and the image signal to an A/D conversion; and a control circuit turning on and off the sample hold signal when the scanner is powered on and off, respectively.
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