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:
Jul. 20, 2004
Filed:
Mar. 21, 2003
Wayne Theel, Plymouth, MN (US);
Other;
Abstract
MRAM noise stabilizing and reducing apparatus and methods for MRAM sensing operations injects noise generated by activation of a word line ( ) into a sense line ( ) and a reference line ( ). Sense strings ( ) addressed by the word line ( ) are alternately coupled to the sense line ( ) and the reference line ( ). Cross coupling reduces the noise injected on the sense lines ( ). Cross coupling also balances the noise created by activation of the word line ( ) between the sense line ( ) and reference line ( ). A sense string ( ) not addressed by the word line ( ) provides a reference signal. A differential amplifier ( ) includes circuitry to compare and store a difference between the sense line ( ) and the reference line ( ). The stored value can be further compared to a second value obtained by reversing the current on the word line ( ).