Methods and apparatus for improving impedance tolerance of...

Details Methods and apparatus for improving impedance tolerance of... Methods and apparatus for improving impedance tolerance of...

2006-06-13

2006-06-13

Cho, James H. (Department: 2819)

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Bus or line termination

C326S026000

Reexamination Certificate

active

07061266

ABSTRACT:
An impedance calibration circuit in an integrated circuit includes a master current source to force a master current to flow through a first load that is external to the integrated circuit. The master current source includes a stabilized current source to provide a first part of the master current and a first supplementary current source to provide a supplementary part of the master current.

REFERENCES:
patent: 6343024 (2002-01-01), Zabroda
patent: 6768393 (2004-07-01), Song
patent: 6963218 (2005-11-01), Alexander et al.

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