| 主权项 |
1. A communication system comprising:
a plurality of communication nodes including a master and a plurality of slaves; and a communication line cascade-connecting the communication nodes and supplying electricity, the communication line corresponding to a feeder line, wherein each of the communication nodes is connected with the communication line through an inductor and is supplied with electricity, the each of the communication nodes is AC coupled to the communication line to transmit and receive a communication signal, the master and the slaves perform a bidirectional communication, each of the communication nodes includes
a receiver receiving the communication signal transmitted from another communication node, anda signal distortion correction circuit at an input side of the receiver, the signal distortion correction circuit detects an amount of distortion of a signal waveform generated by a magnetic saturation phenomenon in the communication line, and the signal distortion correction circuit corrects the distortion of the signal waveform according to the amount of the distortion, and the signal distortion correction circuit includes
an A/D converter performing an A/D conversion of a reception signal,a comparator comparing an A/D converted data and a threshold data and outputting a binary data as an output data according to a comparison result of the A/D converted data and the threshold data,a subtractor calculating a difference between the A/D converted data and the output data, anda correction circuit correcting an output data of the A/D converter according to the difference. |
