从长远的观点来看,纤维光学数据总线将取代有多种用途的普通电传输的数据总线。这就对光接收机电路提出了特殊的要求。因为在扩展的网络中,端站所接收到的信号电平可能差别很大,所以接收机必须有较大的动态工作范围。另外,对PCM系统还要考虑信息的同步和定时恢复问题。本文介绍的线路满足提出的要求。 From a long-term point of view, the fiber optic data bus will replace the common data bus with multiple uses. This puts forward special requirements for the optical receiver circuit. Because in the expanded network, the end station received the signal level may vary widely, so the receiver must have a larger dynamic operating range. In addition, the PCM system should also consider the synchronization of information and timing recovery issues. This article describes the line to meet the proposed requirements.