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. 07, 2007
Filed:
May. 27, 2004
Xiaonan Zhang, Palo Alto, CA (US);
Michael Xiaonan Wang, Stanford, CA (US);
Xiaonan Zhang, Palo Alto, CA (US);
Michael Xiaonan Wang, Stanford, CA (US);
VeriSilicon Holdings, Co. Ltd., Santa Clara, CA (US);
Abstract
A cell library which enables reduced quantization over-design in large scale circuit design is provided. Library cells having the same cell function have drive strengths selected to provide delays about equal to a predetermined set of design delays, at a nominal load corresponding to the cell function. In contrast, conventional cell libraries typically have drive strengths which correspond to a predetermined set of cell physical areas. Preferably, the spacing between adjacent design delays is a non-decreasing function of cell drive strength. Such spacing reduces quantization induced over-design compared to conventional cell libraries which have a design delay spacing that is a decreasing function of cell drive strength.