Method for transmission of three signals through the four-wire communication line

摘要

The invention relates to methods for transmission of three signals and can be used in communication interfaces upon transmission of information, measurement of values of three thermo- or tensoresistors.Summary of the method consists in that the current values at the input and output of the communication line, corresponding to the characteristic conductance values, form two projective coordinate systems. For this purpose, the bias currents of required value are used. The projective coordinates of the points with respect to their coordinate systems are equal between them. By measuring the currents at the input, the projective coordinates of the point are reduced and are calculated the values of the information conductances or signals.