| 摘要 |
PROBLEM TO BE SOLVED: To provide a plurality of photoelectric transducers with one O/E convertor and not to generate cross talk. SOLUTION: The plus side of a power source E is commonly connected to each cathode of PD1-1, 1-2, 1-3, 1-4 through an impedance element 2 (the minus side is grounded). Each anode of the PD1-1, 1-2, 1-3, 1-4 is grounded through switches SW1, SW2, SW3, SW4, respectively. The connecting point between the impedance element and the PD1-1, 1-2, 1-3, 1-4 is connected to a high-input impedance amplifier (AMP) 3 through a capacitor C. The output of the high-input impedance amplifier AMP is connected to an arithmetic circuit (microcomputer) 5 through an AC level voltage conversion circuit 4. COPYRIGHT: (C)2006,JPO&NCIPI
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