Dynamic impedance control for input/output buffers

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United States of America Patent

PATENT NO 8847623
APP PUB NO 20120019282A1
SERIAL NO

13248330

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Abstract

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A system and method of performing off chip drive (OCD) and on-die termination (ODT) are provided. A common pull-up network composed of transistors and a common pull-down network composed of transistors are employed to implement both of these functions. In drive mode, the pull-up network is configured to produce a calibrated drive impedance when an “on” output is to be generated, and the pull-up network is configured to produce a calibrated drive impedance when an “off” output is to be generated. In termination mode, the pull-up network and the pull-down network are configured to produce a calibrated pull-up resistance and pull-down resistance respectively such that together, they form a split termination.

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Patent Owner(s)

  • CONVERSANT INTELLECTUAL PROPERTY MANAGEMENT INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Millar, Bruce Stittsville, CA 45 1874

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