| 摘要 |
PURPOSE:To output a binary-coded signal and an analog signal while reducing size, by integrally storing a photodetecting element, an amplifier and a binary- coding circuit in a storage body, and leading output signals out of the amplifier and binary-coding circuit. CONSTITUTION:At a prescribed ring-side position on a printed wiring board 11, a photodiode 12 as a photodetecting element is provided. Around the photodiode 12 on the board 11, an electric circuit 13 which outputs the result of discrimination between light and dark according to the output of the photodiode 12 is incorporated. At the right end part on the board 11, lead wires 141 and 142 for electric power supply and electric signal output to the electric circuit 13 are connected. At the left end part of the board 11, a variable resistor 16 for varying the amplification factor of an amplifier in the electric circuit 13 and a test pin 16 for observing a photoelectric conversion signal (analog output) in the electric circuit 13 are pvovided. |
