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. 23, 2005
Filed:
Mar. 01, 2002
Applicants:
Eric-roger Brücklmeier, München, DE;
Herbert Palm, Höhenkirchen, DE;
Andreas Kux, Haar, DE;
Inventors:
Assignee:
Infineon Technologies AG, Munich, DE;
Primary Examiner:
Int. Cl.
CPC ...
G06F017/00 ;
U.S. Cl.
CPC ...
Abstract
The access time for the use of an electronic device, for example a chip, is prolonged after each unauthorized access attempt. The access time is determined by the time for the matching of the turn-on voltages of two floating gate cells. Before an access attempt, the turn-on voltage of one cell is set to a predefined initial value and the turn-on voltage of the other cell is set to a value which is higher in comparison and which is increased after each unauthorized access.