| 摘要 |
An image signal processing system comprises an image sensor for receiving images of a subject in a form of light under the control of a shutter control signal and generating analog signals, an A/D converter for varying a comparison voltage range according to the shutter control signal and converting the analog signals of the image sensor into digital signals according to the varied comparison voltage range, and an image data processor for receiving output signals of the A/D converter to obtain movement values and generating the shutter control signal controlling an exposure time of the image sensor. The image signal processing system can realize high definition using the low resolution A/D converter, and occupies a small area in the semiconductor integrated circuit, and has low power consumption. Further, the image signal processing system can make use of the A/D converter in which a signal-to-noise is ratio of the input signal is relatively low.
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