| 摘要 |
PURPOSE:To perform a signal transmission having no error when a light transmitting module is connected to another circuit and used. CONSTITUTION:A light transmitting module 1 has a circuit for confirming that the light transmitting module 1 is in the operable state, or a power source voltage is in the normal state, and each circuit is in a steady operation mode; and a circuit for controlling the light emission of light output to an effective transmission signal. A light receiving module 2 has a circuit for showing that the power source voltage is in the normal state, gain control and, as occasion demands, timing control are also in the stable state, and a normal receipt signal is received. |
