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. 30, 2026
Filed:
Aug. 05, 2025
Stmicroelectronics International N.v., Geneva, CH;
Michele Boscolo Berto, Milan, IT;
STMicroelectronics International N.V., Geneva, CH;
Abstract
A voice coil motor (VCM) in a hard disk drive having a VCM resistance is driven based on a value of the back electromotive force (BEMF) of the VCM reconstructed from a voltage drop indicative of the intensity of a current flowing towards the VCM detected by an amperometry resistance. The BEMF of the VCM is reconstructed as a function of the voltage drop via a first gain value, determined as the ratio of the VCM resistance to the amperometry resistance. A calibrated gain value, indicative of the ratio of the actual VCM resistance to the amperometry resistance is produced by applying a correction factor to the first gain value. The VCM is driven continuously based on a value of the BEMF of the VCM reconstructed by applying to the voltage drop the calibrated gain value.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile