DATA COMMUNICATION CIRCUIT AND THE SAME METHOD

摘要

The circuit generates synchronizing signal using normal AC power of 60Hz-sinewave and communicating data bidirectionally during the period of the synchronizing signal. The circuit includes a phase detector (50) for edge-conversion detecting the output of a digital converter (40) and supplying the 1st sync. signal to the 1st microprocessor (10), the 1st microprocessor (10) for generating the 2nd sync. signal of 50 %-duty-ratio from the 1st sync. signal, a PLC modem (20) for interfacing data with a power line under the control of the 1st microprocessor (10), and a buffer (60) for performing bidirectional path according to the 2nd sync. signal.