05134311 is referenced by 241 patents and cites 1 patents.

A self-adjusting impedance matching driver for a digital circuit. The driver has both a pull-up gate to VDD and a pull-down gate to ground. An array of gates is provided in parallel with each of the pull-up gate and the pull-down gate, with any one or more of such gates being selectively enabled in response to circuit means that monitors the impedance match between the output of the driver and the network it drives. By enabling selectively such gates, any impedance mismatch can be minimized. The selective enablement may be done only at power up, and thereafter only if the driven network is changed substantially.

Title
Self-adjusting impedance matching driver
Application Number
7/534406
Publication Number
5134311
Application Date
June 7, 1990
Publication Date
July 28, 1992
Inventor
Douglas W Stout
Milton
VT, US
Alice I Biber
Needham
MA, US
Agent
J Dennis Moore
Assignee
International Business Machines Corporation
NY, US
IPC
H03K 5/159
H03K 17/16
H03K 3/01
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