Variable impedance output driver

Details Variable impedance output driver Variable impedance output driver

2006-08-01

2006-08-01

Cho, James H. (Department: 2819)

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Bus or line termination

C326S021000

Reexamination Certificate

active

07084662

ABSTRACT:
A variable impedance output driver has been disclosed. One embodiment of the variable impedance output driver includes a first pull-up structure, a pull-down structure, and a comparator, coupled to the first pull-up structure and the pull-down structure, to calibrate the first pull-up structure and the pull-down structure against a reference impedance. Other embodiments are described and claimed.

REFERENCES:
patent: 6166563 (2000-12-01), Volk et al.
patent: 6384621 (2002-05-01), Gibbs et al.
patent: 6541996 (2003-04-01), Rosefield et al.
patent: 6762620 (2004-07-01), Jang et al.

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