Wide-band analog front-end for DSL applications

Details Wide-band analog front-end for DSL applications Wide-band analog front-end for DSL applications

2006-06-13

2006-06-13

Kumar, Pankaj (Department: 2631)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

Reexamination Certificate

active

07061987

ABSTRACT:
An analog front-end circuit and method that supports multiple digital subscriber line (DSL) standards, including asymmetric digital subscriber line (ADSL) and very-high speed digital subscriber line (VDSL) is disclosed. The circuit incorporates multiple circuit blocks that can be selectively included into the transmit and receive paths of a DSL signal. It also permits selectable gain settings for signal amplifiers, and frequency bandwidth for signal filters that may be included in the transmit and receive paths. The receive path includes an analog-to-digital converter (ADC) that operates close to and exceeds the Nyquist sampling rate.

REFERENCES:
patent: 6281829 (2001-08-01), Amrany et al.
patent: 6839320 (2005-01-01), Paridaens et al.
patent: 6870928 (2005-03-01), Conroy et al.
Gustavson et al., U.S. Appl. No. 09/595,259 entitled High Performance Analog Front-End Architecture for Asynchronous Digital Subscriber Lines, filed Jun. 15, 2000, pp. 1-28.

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