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:
Jun. 24, 2014
Filed:
Aug. 09, 2013
Marvell International Ltd., Hamilton, BM;
Qiyue Zou, San Jose, CA (US);
Supaket Katchmart, San Jose, CA (US);
Gregory Burd, San Jose, CA (US);
Marvell International Ltd., Hamilton, BM;
Abstract
Synchronization technologies for disk drives are described. A described technique includes receiving a waveform produced by a read head operated with respect to a recording medium including magnetic data positions, a first servo sync mark (SSM), a second SSM, and phase tracking fields (PTFs); producing, based on the waveform, a servo detect pulse that indicates a detection of at least one of the SSMs; controlling a first adjustment of a phase of a write clock signal, the first adjustment being responsive to the servo detect pulse; producing, based on the write clock signal, samples of the waveform that correspond to the PTFs; and controlling second adjustments of the phase based on the samples to align the write clock signal with at least a portion of the data positions, the second adjustments being responsive to the PTFs, respectively.