| 摘要 |
PROBLEM TO BE SOLVED: To provide a color sensor capable of canceling a dark current voltage off-set to enhance temperature robustness. SOLUTION: This color sensor is provided with a color sensor circuit, a dark color sensor circuit, and a differential amplification circuit. The color sensor circuit receives a photocurrent from a color component of incident light. The color sensor circuit outputs the first voltage indicating intensity of the color component. The dark color sensor circuit receives a dark photocurrent to output the second voltage indicating an off-set voltage. The differential amplification circuit is coupled to the color sensor circuit and the dark color sensor circuit. The differential amplification circuit receives the first and second voltages, and outputs the final output for canceling an influence of the off-set voltage in the first voltage due to the dark photocurrent. COPYRIGHT: (C)2005,JPO&NCIPI
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