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:
Dec. 15, 2009
Filed:
Dec. 15, 2006
Shehzaad Kaka, Pittsburgh, PA (US);
Mark William Covington, Pittsburgh, PA (US);
Nils Jan Gokemeijer, Pittsburgh, PA (US);
Michael Allen Seigler, Pittsburgh, PA (US);
Shehzaad Kaka, Pittsburgh, PA (US);
Mark William Covington, Pittsburgh, PA (US);
Nils Jan Gokemeijer, Pittsburgh, PA (US);
Michael Allen Seigler, Pittsburgh, PA (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
An apparatus includes a magnetically biased multilayer structure having a reference layer and a free layer separated by a spacer layer; a DC current source connected to the multilayer structure; an AC current source connected to the multilayer structure; and a phase detector for measuring a phase difference between an AC current and a voltage across the multilayer structure. A method performed by the apparatus is also provided.