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. 18, 2008
Filed:
Feb. 24, 2004
James E. Mandry, North Andover, MA (US);
James E. Mandry, North Andover, MA (US);
Altera Corporation, San Jose, CA (US);
Abstract
A digital storage medium for storing electronic data for use with a clock tree design tool to design a clock distribution network within an integrated circuit. The electronic data implements a library of shim cells, wherein each of the shims cells represents a physical embodiment of a different clock driver cell such that all of the shim cells in the library are interchangeable in the clock distribution design without requiring any change in the placement or routing within the integrated circuit to maintain compliance with design requirements for the integrated circuit. Each cell within a library represents a structure that introduces a particular delay time in the clock signal. The library contains cells having a range of delays that span a range that is sufficiently large to deal with the range of clock skews typically encountered during integrated circuit design.