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. 01, 2010
Filed:
May. 18, 2007
Craig Smith, Santa Clara, CA (US);
Stan Shepherd, Morgan Hill, CA (US);
Xin Yang, Fremont, CA (US);
Yu Sun, Pleasanton, CA (US);
Craig Smith, Santa Clara, CA (US);
Stan Shepherd, Morgan Hill, CA (US);
Xin Yang, Fremont, CA (US);
Yu Sun, Pleasanton, CA (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
Devices and methods for performing dynamic sampling of a back electromotive force (BEMF) measurement are provided. A device has hardware, including a voice coil motor (VCM) for receiving a VCM command signal and a correction circuit, for obtaining the VCM command signal and a coil voltage measurement from the hardware, where the correction circuit removes a transient voltage measurement due to a change in the VCM command signal from the coil voltage measurement and outputs an estimated BEMF measurement.