| 摘要 |
PURPOSE:To improve a delay of voltage response speed and to read a correct signal by driving a matrix. CONSTITUTION:An output from photoelectric conversion elements 101... is amplified by preamplifiers A1... analog switches OQ1...OQn for individual electrodes are scanned and taken out, a circuit constant is determined so that the output of a differential waveform may appear as an output of the first element of respective blocks, and the output is separated to two systems of the output 31 for the first element part only and the output 32 for the remaining element 32. Separated outputs 31 and 32 are made binary by using comparators 41 and 42, and the threshold level of the comparator 41 is higher than the threshold level of the comparator 42, and therefore, erroneous actions can be prevented beforehand.
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