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:
Sep. 05, 2017
Filed:
Feb. 01, 2016
Applicant:
Seagate Technology Llc, Cupertino, CA (US);
Inventors:
Vijay Kumar, Edina, MN (US);
Narayanan Ramakrishnan, Eden Prairie, MN (US);
Assignee:
Seagate Technology LLC, Cupertino, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 21/02 (2006.01); G11B 20/10 (2006.01); G11B 5/55 (2006.01); G11B 5/48 (2006.01);
U.S. Cl.
CPC ...
G11B 20/10268 (2013.01); G11B 5/483 (2015.09); G11B 5/4826 (2013.01); G11B 5/5552 (2013.01); G11B 5/5573 (2013.01);
Abstract
An apparatus and associated method contemplating a head gimbal assembly (HGA) and a bridge circuit including first and second microactuators attached to the HGA. Computation logic is connected to the bridge circuit and configured to independently measure an electrical output of each microactuator and to sum the electrical outputs to derive a value related to a vertically dominant modulation mode of the HGA.