The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 06, 2005
Filed:
May. 30, 2002
David Marshall, Fort Collins, CO (US);
Karl J. Bois, Fort Collins, CO (US);
Elias Gedamu, Fort Collins, CO (US);
David Marshall, Fort Collins, CO (US);
Karl J. Bois, Fort Collins, CO (US);
Elias Gedamu, Fort Collins, CO (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
A data bus for a printed circuit board is disclosed having a plurality of lines separated by a substrate. A method is also disclosed for creating a bus with a reduced reflection of signal energy at the interface between the bus and a receiving agent connected to the bus. The lines in the bus include data lines and at least two strobe lines that are positioned adjacent each other to take advantage of the known impedance inherent to their dominant coupling. The bus includes separate data-line terminations and strobe-line terminations connected to the data lines and strobe lines, respectively. The separate terminations have values matched to impedances calculated from the separate sets of lines to more effectively reduce the reflected energy by more accurately matching the impedances on the lines.