Method and device for monitoring differential signal fault
A differential signal and fault monitoring technology, which is applied in the direction of measuring devices, line transmission monitoring/testing, measuring electricity, etc., can solve the problems of long fault location time, lower transmission efficiency, and inability to accurately locate replaceable units, etc., to achieve low cost, Enhanced sensitivity and simple structure
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[0024] Differential signal (Differential Signal, DS) transmission technology refers to a communication transmission technology that uses a pair of physical lines with opposite current directions and equal sizes to transmit signals. Such as figure 2 As shown, the sending end converts the signal to be sent into two signals with opposite voltages and the same amplitude, and transmits the signals through line A and line B respectively; the signal received by the receiving end is the difference between the two signals. The influence of external electromagnetic interference on the line is usually to change the voltage amplitude of line A and line B at the same time. In this case, the signal difference between line A and line B will basically not change, so the differential signal is basically not affected by external interference. And because the currents of line A and line B are opposite and the amplitudes are equal, the electromagnetic field of their external radiation is cancelled o...
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