Communication circuit, communication network, and connecting apparatus

摘要

The present invention provides a communication circuit, a communication network, and a connecting apparatus that can realize communication with very high reliability using a simple wiring system, that includes a communication line 2 comprising three or more signal lines 2a,2b,2c, a signal distributing section 4, that is connected to one end of the communication line 2, for distributing and transmitting a signal input into an input terminal 3i to respective signal lines 2a,2b,2c, and a majority selection receiving circuit 5, that is connected to the other end of the communication line 2, for comparing a plurality of reception signals received via the signal lines 2a,2b,2c and selecting reception signals which are most matched with one another as true so as to output them to an output terminal 30.

主权项

1. A communication circuit comprising:
a communication line comprising three or more signal lines; and a plurality of nodes, each of the nodes connected to an end of the communication line, and each of the nodes including:
a signal distributing section, which is connected to a respective one of the ends of the communication line, for distributing and transmitting a signal input into an input/output terminal to the signal lines;a majority selection receiving circuit for comparing a plurality of reception signals received via the signal lines and selecting reception signals of the plurality of reception signals that are most matched with each other as true so as to output them to the input/output terminal; anda time division communication control section for switching communication directions of the signal distributing section and the majority selection receiving circuit at time-divided timing so as to hold bidirectional communication,wherein the time division communication control section includes a token call control section for transmitting tokens according to a number of the plurality of nodes at predetermined times, andwherein, at synchronous timings given to the plurality of the nodes and following the tokens to the communication line, one of the plurality of nodes outputs the signal input into its input/output terminal and a remainder of the plurality of nodes provides interlocking to prevent their signals from being input from their input/output terminals.