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. 22, 2004
Filed:
Jan. 12, 2000
Stanley H. Shepherd, Morgan Hill, CA (US);
Michael Anthony Moser, San Jose, CA (US);
Yakov Lifchits, San Jose, CA (US);
Ching-Tzuen Tarn, San Jose, CA (US);
Mohamad A. Rezvani, San Jose, CA (US);
Maxtor Corporation, Longmont, CO (US);
Abstract
A spindle motor control for a disk drive including a spindle motor for rotating a data disk at a desired rotational speed, and a data transducer head positionable relative to selected ones of a multiplicity of concentric data tracks formed on a data storage surface of the data disk by a head position actuator structure operating within a head position servo loop, wherein the concentric data tracks are periodically interrupted by a plurality of servo sectors per rotation, each servo sector recorded with head position information. The spindle motor control includes: a servo detector for detecting the head position information in at least one servo sector on a selected track under the transducer head in relation to a timing signal at a reference frequency; a position detector for determining the circumferential position of the detected head position information on the selected track in relation to the timing signal; and a controller for controlling the rotational speed of the spindle motor as a function of said circumferential position, to regulate the circumferential position of the transducer in relation to the servo sectors on the data tracks.