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:
Apr. 13, 2004
Filed:
Dec. 12, 2001
Applicant:
Inventors:
Assignee:
Western Digital (Fremont), Inc., Fremont, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 1/115 ;
U.S. Cl.
CPC ...
G11C 1/115 ;
Abstract
A reference cell circuit for a magnetic tunnel junction MRAM includes a first magnetic tunnel junction device set to a low resistance state and a second magnetic tunnel junction device set to a high resistance state. A reference cell series unit includes the first magnetic tunnel junction device electrically coupled in series with the second magnetic tunnel junction device. The reference cell series unit further has a first end and a second end with the first end being electrically coupled to a first current source and the second end being electrically coupled to a current sink and a second current source.