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:
Jul. 15, 2025
Filed:
Mar. 05, 2024
Western Digital Technologies, Inc., San Jose, CA (US);
Guoxiao Guo, Irvine, CA (US);
Yanning Liu, San Jose, CA (US);
Joey M. Poss, Rochester, MN (US);
Ryan Mayo, Aliso Viejo, CA (US);
Richard Conway, San Jose, CA (US);
Scott A Ottele, Longmont, CO (US);
Charles A. Park, Aromas, CA (US);
Western Digital Technologies, Inc., San Jose, CA (US);
Abstract
Example circuits, data storage devices, and methods to provide parallel self-servo write in a data storage device are described. The data storage device may include multiple heads actuated over respective surfaces of storage media and at least two preamplifiers and read paths to a channel circuit. Control circuitry may select heads connected through different preamplifiers for parallel self-servo write and receive read signals from the selected heads in parallel. These read signals, which may be based on self-servo write reference spirals previously written to the storage media, may be used to determine respective position error signals for the two heads and control their respective positions with corresponding control signals to a shared voice control motor and respective micro and/or milli actuators on the arms supporting the heads.