Circuit configuration for line adaptation and echo suppression

Details Circuit configuration for line adaptation and echo suppression Circuit configuration for line adaptation and echo suppression

1997-03-26

1999-10-19

Le, Dinh T.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Unwanted signal suppression

327551, 379399, 379406, H03K 500

Patent

active

059695676

ABSTRACT:
A circuit configuration for line adaptation and echo suppression includes a balance filter which is triggered by transmission signals and supplies output signals that are linked through a subtractor to a reception signal. An impedance adaptation filter is triggered by the reception signal and supplies an output signal that is linked through an adder to the transmission signal. An analog/digital converter converts analog reception signals into digital reception signals. A digital/analog converter converts digital transmission signals into analog transmission signals. The impedance adaptation filter processes digital signals and the balance filter processes analog signals.

REFERENCES:
patent: 4161633 (1979-07-01), Treiber
patent: 4232400 (1980-11-01), Yamamoto et al.
"A Signal-Processing Codec Filter for PCM Applications", Vogel et al., Siemens Forschungs-und Entwicklungsberichte 15, 1986, No. 5, Berling, pp. 253-258.
Published International Application WO 90/13185, (Eriksson), dated Nov. 1, 1990.

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