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:
Aug. 31, 1999
Filed:
Sep. 19, 1997
Bruce Millar, Stittsville, CA;
Sldram, Inc., Palo Alto, CA (US);
Abstract
The present invention provides for high speed signal buses in printed circuit boards. For high speed operation, each signal line of a bus has substantially the same electrical length as the other signal lines and forms a loop in two halves, each half electrically shielded from the other half. Each signal line has a first and a second terminal, with each terminal connected to a reference bias voltage through a first resistance which matches a loaded characteristic impedance of the signal line. The reference bias voltage is set at a midpoint of signal voltage swings on the signal line. Such high speed buses have particular applications to high speed memory systems with DRAMs.