| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical signal receiving control circuit, which can be adjusted easily without need special knowledge, in comparison to conventional examples and always and optimally adjusts an optical signal receiving circuit. SOLUTION: In an optical signal receiving circuit, a photodetector 1 receives an optical digital signal that is transmitted through an optical communication line, undergoes photoelectric conversion of it into an electric signal, an amplifier 2 amplifies the electric signal that has undergone photoelectric conversion, an identification circuit 3 identifies a code in the amplified electric signal and outputs an electric signal that represents a code. Here, an optical signal receiving control circuit 10, which controls the optical signal receiving circuit centralized controls each operation variable of the photodetector 1, the amplifier 2 and the device 3 by using control signals x1 to x4 , in order to minimize bit errors in the optical digital signal that is received through the optical communication line. |
