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:
May. 27, 2014
Filed:
Jun. 13, 2012
Richard Leo Galbraith, Rochester, MN (US);
Weldon Mark Hanson, Rochester, MN (US);
Martin Aureliano Hassner, Mountain View, CA (US);
Travis Roger Oenning, Rochester, MN (US);
Satoshi Yamamoto, San Jose, CA (US);
Richard Leo Galbraith, Rochester, MN (US);
Weldon Mark Hanson, Rochester, MN (US);
Martin Aureliano Hassner, Mountain View, CA (US);
Travis Roger Oenning, Rochester, MN (US);
Satoshi Yamamoto, San Jose, CA (US);
HGST Netherlands B.V., Amsterdam, NL;
Abstract
A method, apparatus, and system are provided for implementing magnetic defect location detection on-the-fly for hard disk drives. A magnetic media readback signal of a hard disk drive is demodulated to generate phase modulation (PM) and amplitude modulation (AM) signals. A new coordinate plane defined by a combined phase modulation (PM) and amplitude modulation (AM) phasor-defect detector calculation function used to locate magnetic defects on-the-fly.