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. 31, 2005
Filed:
Jun. 07, 2001
Sam Gat-shang Chu, Austin, TX (US);
Joachim Gerhard Clabes, Austin, TX (US);
Michael Normand Goulet, Austin, TX (US);
Johnny J. Leblanc, Austin, TX (US);
James Douglas Warnock, Somers, NY (US);
Sam Gat-Shang Chu, Austin, TX (US);
Joachim Gerhard Clabes, Austin, TX (US);
Michael Normand Goulet, Austin, TX (US);
Johnny J. Leblanc, Austin, TX (US);
James Douglas Warnock, Somers, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A device for fault testing in a microprocessor chip provides a LBIST circuit which has a first reference signature. A loading unit is further provided for receiving and outputting a set of masking data. A file unit connected to the loading unit is yet further provided for receiving the masking data. A masking unit connected to the file unit is yet further provided for generating a second reference signature based on the masking data from the file unit and a scanning data from a scan string in the chip. And, a signature logic connected to the output of the masking unit is yet further provided for compressing the second reference signature and inputting the compressed second reference signature to the LBIST circuit, wherein the compressed second reference signature replaces the first reference signature.