Telegraphic transmission of processor information - employs electronic switching circuit to transmit binary information to distant peripheral

摘要

The electronic switching circuit is used for telegraphic transmission of information from a processor to distant peripheral equipments such as a teleprinter. Information is transmitted in binary form and includes circuits to eliminate disturbances from 50Hz voltages. A constant current generator (G1) produces a signal when commanded by control circuit (CD). The current flow is indicated by a monitoring circuit (MI). The constant current signals are applied to two identical switching circuits (T1, T2) whose outputs are applied to two transistors (T7, T8) whose bases are switched by a multivibrator (NB). The switched outputs are applied via capacitors (C1, C2) and diode bridge circuit (D3-7) to the lines (1g1, 1g2) to a peripheral equipment (TY).