Method and apparatus for calibrating driver impedance

Details Method and apparatus for calibrating driver impedance Method and apparatus for calibrating driver impedance

2006-10-31

2006-10-31

Cho, James H. (Department: 2819)

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Bus or line termination

C326S031000

Reexamination Certificate

active

07129738

ABSTRACT:
The present invention provides a method and apparatus is provided for calibrating a driver impedance in an integrated circuit device. The method includes providing a signal from a synchronous circuit that is indicative of an impedance mismatch between a driver circuit and a load. The method also includes selecting one of a plurality of impedances of the driver circuit to reduce the impedance mismatch in response to the signal.

REFERENCES:
patent: 5296756 (1994-03-01), Patel et al.
patent: 6064224 (2000-05-01), Esch et al.
patent: 6087847 (2000-07-01), Mooney et al.

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