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:
Oct. 02, 2007
Filed:
Feb. 07, 2003
Istvan Novak, Maynard, MA (US);
Jason R. Miller, Cambridge, MA (US);
Eric L. Blomberg, Woburn, MA (US);
Deborah Foltz, Pelham, NH (US);
Kenneth Laird, Pittsburgh, PA (US);
Istvan Novak, Maynard, MA (US);
Jason R. Miller, Cambridge, MA (US);
Eric L. Blomberg, Woburn, MA (US);
Deborah Foltz, Pelham, NH (US);
Kenneth Laird, Pittsburgh, PA (US);
Sun Microsystems, Inc., Santa Clara, CA (US);
Abstract
An adaptive subgridding method for power/ground plane simulations. The method includes superimposing a grid of cells onto a circuit plane. For each cell, the method may determine a fill ratio representing the amount of area in a given cell that overlaps with the circuit plane. For each cell having a fill ratio that is less than a predetermined upper limit or a predetermined lower limit the cell may be divided into a plurality of subcells. The method may then determine the fill ratio for each of the subcells. As with the original cells, each of the subcells having a fill ratio less than the predetermined upper limit and greater than the predetermined lower limit may be further subdivided into additional subcells. The loop may repeat itself until a predetermined integer value is reached, wherein the integer value indicates the number of times a cell may be subdivided.