TRANSCEIVING CIRCUIT Russian patent published in 1999 - IPC

FIELD: optical communication. SUBSTANCE: invention refers to passive optical long-distance communication system that has collection of non-central devices which are connected via own light guide connection line to optical splitter that is linked directly or via one more additional optical splitter and light guide bus to common light guide input of central device. In this case non- central and central devices transmit or correspondingly receive optical digital signals by method of double talk in same frequency band. Transceiving circuit is so manufactured that output of optoelectric converter is connected to input of optoelectric converter via electric inverter of receiving signal and optical delay line which delay is timed to operation time of electric inverter of receiving signal is placed between output of optoelectric converter and light guide connection line. EFFECT: exclusion of negative influence on sensitivity during reception of signal at central device. 4 cl, 1 dwg