CONVERTER/LINE DRIVER CIRCUIT FOR A LINE REPEATER

摘要

A converter circuit receives N-rail logic signals and converts them into a precision N-level signal. A pair of line drivers is connected in a balanced output arrangement with the primary winding of an output transformer. In response to the N-rail logic signals, weighted currents are conducted through an input impedance, connected with the line drivers, to a ground reference. As a result the line drivers conduct various levels and polarities of current through the entire primary winding of the output transformer. Thereby a precision N-level signal is produced in a secondary winding of the output transformer and at the converter output terminals.