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:
Feb. 27, 2018
Filed:
Feb. 15, 2016
Seagate Technology Llc, Cupertino, CA (US);
Xiong Liu, Singapore, SG;
Michael R. Montemorra, Longmont, CO (US);
Ralph W. Cross, Lyons, CO (US);
Todd M. Lammers, Lafayette, CO (US);
Quan Li, Singapore, SG;
Beng Theam Ko, Singapore, SG;
Kirill Rivkin, Edina, MN (US);
Mourad Benakli, Eden Prairie, MN (US);
Seagate Technology LLC, Cupertino, CA (US);
Abstract
Method and apparatus for enhancing write current switching efficiencies during data write operations in a data storage device. In some embodiments, write data are described in the form a sequence of symbols of nT length where T is a channel clock rate and n is an integer over a selected range. Bi-directional write currents are applied to a write element to record the sequence of symbols to a storage medium. The write currents are switched between a first rail current and a second rail current for alternating symbols. The write currents are further transitioned to an intermediate current value for at least one channel clock period immediately preceding a next occurrence of a symbol boundary between an adjacent pair of symbols in the sequence.