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:
Oct. 28, 2008
Filed:
Jul. 15, 2004
Alexander B. Hoefler, Austin, TX (US);
Qadeer A. Qureshi, Dripping Springs, TX (US);
Alexander B. Hoefler, Austin, TX (US);
Qadeer A. Qureshi, Dripping Springs, TX (US);
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
A memory not only uses redundant cells but also redundant references to reduce the likelihood of a failure. In one approach a failure in a reference can cause both the primary cell as well as the redundant cell to be ineffective. To overcome this potential problem two references for each bit are employed. In one form, the primary cell of a first bit is compared to one reference and the redundant cell of the first bit is compared to another reference. The primary and redundant cell of a second bit can use these two references as well. In another aspect, two references are placed in parallel for both the primary and redundant cell of the bit.