Active termination and switchable passive termination circuits

Details Active termination and switchable passive termination circuits Active termination and switchable passive termination circuits

2011-07-19

2011-07-19

Tran, Anh Q (Department: 2819)

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Bus or line termination

C326S034000, C326S086000

Reexamination Certificate

active

07982491

ABSTRACT:
According to one exemplary embodiment, an active termination circuit includes at least one active termination branch, where the at least one active termination branch includes at least one transistor for providing an active termination output. The at least one active termination branch further includes an amplifier driving the at least one transistor, where the amplifier has a non-inverting input coupled to the active termination output via a feedback network. The amplifier controls a current flowing through the at least one transistor so as to provide the active termination output. The active termination output can be provided at a drain of the at least one transistor, where a source of the at least one transistor is coupled to ground through a degeneration transistor and a tail current sink.

REFERENCES:
patent: 6107867 (2000-08-01), Lakshmikumar
patent: 6343024 (2002-01-01), Zabroda
patent: 2008/0150650 (2008-06-01), Rentala et al.

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