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Rise of antijamming capability at data communication by the twisted pair of wires

Rise of antijamming capability at data communication by the twisted pair of wires

The twisted pair of wires, current loop, PCP (light-emitting diode – photodiode; light-emitting diode - phototransistor) are the elements with high antijamming capability. A circuit on fig.1 allows to multiply antijamming of the scheme decisions. In this case the logical ,,1” is passed to the receiver by the current , and logical ,,0” is passed to the receiver by the current . The current flows on the same twisted pair of wires, but only in opposite direction (fig.2):

Eke – falling of tension on collector - emitter transition of the opened transistor at R1 = R0. , – currents of logical ,,1” and logical ,,0” flowing through the light-emitting diodes of photon-coupled pair (PCP). A line is always found under action of currents of logical ,,1”, or logical,,0”, that multiplies its antijamming capability in the conditions of the large electromagnetic fields and hindrances. Absence of currents means disconnect.

Fig.1. Rise of antijamming capability at data communication by the twisted pair of wires Circuit.

Fig.2.

added 05.01.08 18:11:25 | looked over 1215 times