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US 2010/0060317 A1Published application
Data output device and semiconductor memory apparatus including the same
AssigneeHynix Semiconductor Inc.
InventorsJeong Yoon Ahn, Ki Ho Kim
Life of this patent
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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.
Claims16
A data output device, comprising:
- a pre-driver unit configured to control a driving force according to an impedance control signal and drive data to output by the driving force;
- and
- 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 and to drive an output of the pre-driver unit by using the controlled impedance.
A semiconductor memory apparatus, comprising:
- a calibration section configured to output pull-up and pull-down resistance control codes for matching an impedance according to an impedance control signal;
- a pre-driver unit configured to control a driving force according to the impedance control signal and drive data to output by the driving force;
- and
- a main-driver unit configured to control the impedance according to the pull-up and pull-down resistance control codes and to drive an output of the pre-driver unit by using the controlled impedance.
1 more element
Dependencies are inferred from the claim text.