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:
Aug. 04, 2015
Filed:
Oct. 28, 2014
Applicant:
Hgst Netherlands B.v., Amsterdam, NL;
Inventors:
John Contreras, Palo Alto, CA (US);
Samir Y. Garzon, San Jose, CA (US);
Rehan Ahmed Zakai, San Ramon, CA (US);
Assignee:
HGST Netherlands BV, Amsterdam, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 5/00 (2006.01); G11B 5/455 (2006.01); G11B 27/36 (2006.01);
U.S. Cl.
CPC ...
G11B 5/455 (2013.01); G11B 27/36 (2013.01); G11B 2005/0024 (2013.01);
Abstract
A method, apparatus, and system are provided for implementing noise based detection of spin-torque oscillator (STO) power on for microwave assisted magnetic recording (MAMR) hard disk drives (HDDs). A low frequency noise generated by a spin-torque oscillator, such as noise in a frequency range between 10 kHz and 100 MHz, is detected. The detected STO noise is compared to a predefined threshold to identify STO power on operation.