Data output device and semiconductor memory apparatus...

Details Data output device and semiconductor memory apparatus... Data output device and semiconductor memory apparatus...

2011-03-22

2011-03-22

Barnie, Rexford N (Department: 2819)

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Bus or line termination

Reexamination Certificate

active

07911225

ABSTRACT:
A data output device includes a pre-driver unit configured to control a driving force according to an impedance control signal and to drive output data using the driving force. The data output device includes a main-driver unit configured to control an impedance according to pull-up and pull-down resistance control codes having values that correspond to the impedance control signal provided to the pre-driver unit and to drive an output of the pre-driver unit by utilizing the controlled impedance.

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patent: 2006/0091901 (2006-05-01), Kim
patent: 2009/0115449 (2009-05-01), Kim et al.
patent: 1020070103907 (2007-10-01), None

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