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, 2002
Filed:
Aug. 20, 1999
Applicant:
Inventors:
Assignee:
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 3/128 ; G06F 1/100 ; G11C 7/00 ; G11C 2/900 ;
U.S. Cl.
CPC ...
G01R 3/128 ; G06F 1/100 ; G11C 7/00 ; G11C 2/900 ;
Abstract
A method and system for testing a memory in operation. A storage unit is used to temporarily free one memory location in the memory, making it possible to check this memory location for bit errors. Data intended for the selected memory location is stored in the storage unit, and instead a test pattern is written into the memory location to be tested and read out again, all in coordination with the normal operation of the memory. If the pattern read from the test location does not match the written test pattern, an alarm is raised.