Asymmetrical digital subscriber line (ADSL) line driver circuit

Details Asymmetrical digital subscriber line (ADSL) line driver circuit Asymmetrical digital subscriber line (ADSL) line driver circuit

1996-04-23

1998-10-20

Chin, Stephen

Pulse or digital communications

Cable systems and components

375258, 379 9301, 379399, 330255, 330258, H04B 300

Patent

active

058258191

ABSTRACT:
A differential amplifier (40) receives a low level ADSL signal IN- and IN+ and produces an amplified differential signal. A pair of differential amplifiers (42, 44) receives the differential signal and provides phase shifting and further amplification to the differential signal. A set of differential pairs (46, 48, 50, 52) are coupled to the pair of differential amplifiers (42, 44) and provide further amplification and drive capability to the differential signal. A pair of driver pairs 54 and 56 are coupled to the differential pairs (46, 48, 50, 52) to provide a fully differential output signal OUT- and OUT+ with high linearity. A common mode feedback stage (58) and gain feedback stage (98) provide feedback.

REFERENCES:
patent: 5235617 (1993-08-01), Mallard, Jr.
patent: 5287386 (1994-02-01), Wade et al.
patent: 5381112 (1995-01-01), Rybicki et al.
patent: 5485488 (1996-01-01), Van Brunt et al.

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