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. 10, 2010
Filed:
Nov. 25, 2008
Applicants:
Carl Xiaodong Che, Saratoga, CA (US);
Yawshing Tang, Saratoga, CA (US);
Haejung Lee, Suwon, KR;
Inventors:
Assignee:
Samsung Electronics Company, Ltd., Suwon, KR;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11B 21/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A hard disk drive that determines a flying height from a ratio of a first harmonic transfer function and a third harmonic transfer function. The transfer functions can be determined from a response to an impulse function. The impulse function (also known as an impulse response) can be a playback waveform de-convolved by channel data sequence. Any change in the ratio of the first and third harmonic transfer functions corresponds to a change in the flying height. The disk drive may utilize the transfer function ratios in a feedback routine to control the flying height.