Bridge circuit to suppress echoes in communication devices

Details Bridge circuit to suppress echoes in communication devices Bridge circuit to suppress echoes in communication devices

2008-01-29

2008-01-29

Singh, Ramnandan (Department: 2614)

Multiplex communications

Duplex

Transmit/receive interaction control

C379S406020

Reexamination Certificate

active

07324467

ABSTRACT:
Bridge circuit for echo suppression for a reception signal of a communication device connected to a transmission line, to which can be supplied a reception signal received via the transmission line and a transmission signal to be transmitted by the communication device via the transmission line. The bridge circuit is designed such that on balancing the bridge circuit, the reception signal there can be tapped echo-compensated with a transmission signal part generated by the transmission signal being suppressed. To balance the bridge circuit a variable simulation device is provided to simulate at least one circuit section of at least one bridge branch and connect with the at least one bridge branch. By such an arrangement, the signal level in the simulation device may be reduced so far that this can be designed as an integrated circuit and to be programmable.

REFERENCES:
patent: 5893034 (1999-04-01), Hikuma et al.
patent: 1 281 562 (1968-10-01), None
patent: 199 61 500 (2000-11-01), None
patent: 1 107 464 (2001-06-01), None
patent: 1107464 (2001-06-01), None

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