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:
May. 16, 1995
Filed:
Dec. 17, 1992
Applicant:
Inventor:
Olivier Pribetich, Vallaurais, FR;
Assignee:
VLSI Technology, Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364489 ; 364488 ; 364490 ; 364491 ; 364578 ;
Abstract
A computerized method of generating a truth table of a cell in a library of circuit cells includes representing basic elements of the cells in a hardware description language, representing each cell as a set of equations in that language and parsing the equations each in accordance with a respective abstract data tree of which the `leaves` or extremities are signal values or constants. The parsing of each equation yields a respective partial truth table. The partial truth tables are merged to provide a complete truth table, which is preferably subjected to Boolean and/or expression optimization to reduce the number of entries in the truth table.