| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a photosensor capable of reducing the effect of thermal noise or a quantization error.SOLUTION: The photosensor causes a sample-and-hold circuit 31 to perform multiple sessions of sampling in a sampling period. The photosensor causes an AD conversion circuit 32 to select plural sets of two sampled values from among a plurality of sampled values that were sampled by the sample-and-hold circuit 31, and to convert a difference value between the two sampled values in each of the selected multiple sets into a digital signal. The photosensor is provided with an averaging circuit 40 for averaging an inclination against time of each of the digital signals converted by the AD conversion circuit 32 and outputting the result.</p> |
