Driver circuit and method for driving a signal

Details Driver circuit and method for driving a signal Driver circuit and method for driving a signal

2006-06-26

2011-12-13

Tsang, Fan (Department: 2614)

Telephonic communications

Subscriber line or transmission line interface

Hybrid circuit

C379S395000, C379S405000, C379S413000

Reexamination Certificate

active

08077856

ABSTRACT:
Driver circuit for driving a transmit signal for a line comprising a signal amplifier which delivers a transmit signal, present at a signal input of the signal amplifier, amplified with a gain to a signal output, a line interface circuit which is connected between the signal output of the signal amplifier and the line, and comprising a hybrid circuit which is connected to the line interface circuit, wherein the hybrid circuit suppresses the transmit signal and couples a received signal received via the line to a signal input of the signal amplifier for the purpose of impedance synthesis.

REFERENCES:
patent: 2002/0034294 (2002-03-01), Servaes et al.
patent: 2010/0104089 (2010-04-01), Hauptmann et al.
patent: 1560412 (2005-03-01), None
patent: 1 560 412 (2005-08-01), None
patent: 1560412 (2005-08-01), None
German Office Action dated Mar. 6, 2006.

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