Digital data transmission equipment

PURPOSE: To provide a data transmission equipment which can be applied to a flight control circuit network and uses a power line and is relatively light- weight. CONSTITUTION: A DC or AC power line is used to perform two-way transmission of data. Transformers T3 and T4 comprises three windings L1, L2, and L3 and ferrite iron cores which are used for connection of data to or from a power line 2. Saturation of iron cores is avoided by a constitution where a load current flows to two windings L1 and L2 in opposite directions. The numbers of turns of these two windings are equalized to completely cancel the DC magnetic fluxes in iron cores. COPYRIGHT: (C)1994,JPO