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. 20, 1996
Filed:
Apr. 06, 1994
Applicant:
Inventors:
Celimo P Hernandez, San Jose, CA (US);
Robyn D Coultas, Atherton, CA (US);
Assignee:
Cadence Design Systems, Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364489 ; 364488 ;
Abstract
A method for generating hierarchical netlists for gate level or transistor level circuits having instances with properties defined by algebraic expressions. The present invention avoids duplication of instance definitions using a method of expression promotion in a computer aided design system capable of simple parameter passing, whereby expressions are replaced by tokens in the netlist, and moved up the hierarchy to a level where they can be fully evaluated. The present invention also provides a specific embodiment for implementing the expression promotion method used for netlisting.