CONVERTER/LINE DRIVER CIRCUIT FOR A LINE REPEATER

摘要

- 16 -CONVERTER/LINE DRIVER CIRCUIT FOR A LINE REPEATERAbstractA converter circuit receives N-rail logic signalsand converts them into a precision N-level signal. A pairof line drivers is connected in a balanced outputarrangement with the primary winding of an outputtransformer. In response to the N-rail logic signals,weighted currents are conducted through an inputimpedance, connected with the line drivers, to a groundreference. As a result the line drivers conduct variouslevels and polarities of current through the entire primarywinding of the output transformer. Thereby a precision N-level signal is produced in a secondary winding of theoutput transformer and at the converter output terminals.