SCHALTUNGSANORDNUNG FUER DIE UEBERTRAGUNG VON NACHRICHTEN MIT TRAEGERFREQUENZ- EINRICHTUNGEN

摘要

For the transmission of data with carrier-frequency devices, a transmission channel and a reception channel have adjacent frequencies and speech or data signals are transmitted simultaneously in both channels. The output of the transmission circuit (S) is connected via a first resistor (R1) to a first winding (W1) of the transformer (Ü). A second winding (W2) is disposed on the transformer and a voltage divider comprising a line balancing network (N) and a second resistor (R2) is disposed in parallel with said winding (W2). The first and second resistors are interconnected in series and are connected to the input of the receiver circuit (E). During transmission, the voltage drops occurring on the first and second resistors cancel one another. <IMAGE>