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:
Apr. 29, 2003
Filed:
Oct. 19, 2000
Kazuhiro Nakajima, Tokyo, JP;
NEC Electronics Corporation, Kanagawa, JP;
Abstract
In a method of designing a signal distribution circuit, a plurality of circuit patterns of buffer circuits and patterns of wiring lines are arranged and connected to have a tree structure. A total delay time from an input of the buffer circuit in the highest layer of the tree structure to an output of each of the buffer circuits in the lowest layer of the tree structure is calculated. Each of the plurality of circuit patterns of the buffer circuits is selectively substituted by one of substitution patterns of substitution buffer circuits such that the total delay times fall within a predetermined range. All the outputs of the buffer circuits in the lowest layer of the tree structure are connected.