Circuit arrangement for the automatic adjustment of a two-wire f

Details Circuit arrangement for the automatic adjustment of a two-wire f Circuit arrangement for the automatic adjustment of a two-wire f

1977-05-04

1978-04-25

Robinson, Thomas A.

Telegraphy

Systems

Chemical

H04L 514

Patent

active

040864286

ABSTRACT:
In a two-wire, full duplex data transmission system a circuit arrangement is described for carrying out an automatic adjustment of the value of the current flowing from the transmitter in a given station to a receiver therein relative to the value of the current supplied to that receiver from another station over a transmission line. A balancing circuit receives the station transmitter current and divides it into a plurality of sub-currents which are subsequently recombined and conducted to the station's receiver. The station transmitter current and the received current values are compared, and a voltage proportional to the difference is produced. That voltage is utilized by a regulating stage to produce a number of regulating voltages corresponding to the number of sub-current carrying branches in the balancing circuit for regulating the amplification of the sub-currents.

REFERENCES:
patent: 4012590 (1977-03-01), Haass
patent: 4052556 (1977-10-01), Haass

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