Einrichtung zur Umwandlung von digitalen Signalen in positive und negative Strom- bzw. Spannungswerte

摘要

Digital signal code words are converted into positive and negative currents or voltages at the receiver of a PCM communications network. A single shift register receives the words and a single resistance network produces the bipolar analog output signals. The network comprises series and shunt resistors. The shunt resistors in the network can each be switched to one of three reference voltages. The switches are controlled by the register via memories and gates.