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:
Mar. 07, 1995
Filed:
Feb. 19, 1993
Barry K Britton, Schnecksville, PA (US);
Dwight D Hill, San Carlos, CA (US);
William A Oswald, Allentown, PA (US);
AT&T Corp., Murray Hill, NJ (US);
Abstract
A field programmable gate array (FPGA) includes a distributed switch matrix for programmably connecting the various routing conductors. The distributed switch matrix comprises groups of additional conductors, referred to as 'Switching R-nodes'. The Switching R-nodes programmably connect selected ones of the (e.g, horizontal) routing conductors to other selected ones of the (e.g., vertical) routing conductors. In this manner, the direct connection between the routing conductors may be avoided, allowing for a reduced number of programmable interconnect devices. In one preferred embodiment, a nibble-mode architecture is used, wherein four data conductors are provided for each group of routing conductors, with other multiples-of-four data conductors also being advantageous.