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. 14, 2009
Filed:
Sep. 10, 2004
Applicants:
Jean-marc Yannou, Colomby sur Thaon, FR;
Hervé Fleury, Caen, FR;
Hervé Vincent, Caen, FR;
Inventors:
Assignee:
NXP B.V., Eindhoven, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 31/28 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to an electronic circuit including a sub-module assembly () connected to the rest of the circuit, the sub-module assembly including a secret sub-module () for performing a function, scan chains; a built-in self test circuit including a pattern generator () to apply input signals to the scan chains, and a signature register () to check output signals from the scan chains. In order to keep the sub-module secret, the scan chains are not connected to the rest of the circuit.