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:
Jan. 13, 2015
Filed:
Dec. 15, 2011
Applicants:
Narayanan Ramakrishnan, Bloomington, MN (US);
Stefan Alexander Weissner, St. Louis Park, MN (US);
Inventors:
Narayanan Ramakrishnan, Bloomington, MN (US);
Stefan Alexander Weissner, St. Louis Park, MN (US);
Assignee:
Seagate Technology LLC, Cupertino, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 5/56 (2006.01); G11B 5/596 (2006.01);
U.S. Cl.
CPC ...
Abstract
In certain embodiments, an apparatus includes a first piezoelectric (PZT) element poled in the same direction as a second PZT element. The first and second PZT elements are configured to be driven while simultaneously sensing motion. The apparatus further includes a circuit configured to add outputs of the first and second PZT elements, extract the sensed motion, and detect off-track motion from the extracted sensed motion.