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. 16, 2002
Filed:
Feb. 05, 1996
Steven D. Millman, Chandler, AZ (US);
Markus Wloka, Chandler, AZ (US);
Sean C. Tyler, Austin, TX (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A plurality of serially coupled circuit cells ( ) are modeled as a distributed serial load. The distributed serial load provides an accurate load model in situations where one cell is effected by loading on subsequent circuit cells, i.e. downstream loading is conveyed back to the first cell. The capacitance ( ) and resistance ( , of each cell has a loading effect on each previous cell. The effective resistance and capacitive values of each cell is identified and maintained as one element of the distributed serial load model. The distributed serial load accurately models the loading of unbuffered cells ( ). The distributed serial load is also applicable to portions of circuit cells ( ) that are not be buffered and where the downstream loading has an effect on previous circuit drivers ( ).