SWITCHING DEVICE FOR DETECTING INTERRUPTIONS IN TRANSMISSION LINES

摘要

The device has a function to detect interruptions in transmission lines. A converter produces two signals of opposite polarity, and a receiver reconverts the signals connected to the converter by a pair of transmission lines. An exclusive-OR gate, connected to the transmission lines, provides an output when normal signals of opposite polarity are present. A switch comprises an AND gate converted to the receiver and to the exclusive-OR gate, which disconnects the receiver when no output is received from the exclusive-OR gate. The received signals from eachline are combined through a common OR gate.