| 摘要 |
PURPOSE:To obtain three kinds of functions of on-delay, off-delay and one shot by providing a time limiting circuit for outputting a time limiting signal after a specific lapse of time by an input of an operating signal, and three gate circuits. CONSTITUTION:In the first gate circuit G1 for driving an output relay by an output of an output pulse from a photodetector and a non-time limiting signal of a time limiting circuit, and the second gate circuit G2 for driving the time limiting circuit by outputting an operating signal when inputting an output pulse, the output relay is operated by an output of the first gate circuit, the output relay is reset by the first gate circuit through the second gate circuit, and a one shot function is obtained. Also, a titled switch is provided with the third gate circuit G3 for driving the time limiting circuit by outputting the operating signal when the output pulse is extinguished, the output relay is operated by the output of the first gate circuit, and an off-delay function is obtained by an output of the third gate circuit from the time when the output pulse is extinguished. Also, an on-delay function is obtained by driving the time limiting circuit through the second gate circuit and operating the output relay through the first gate circuit. |
