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:
Apr. 25, 2006
Filed:
May. 21, 2003
Tetsuo Semba, Zama, JP;
Naoyuki Kagami, Fujisawa, JP;
Akira Tokizono, Fujisawa, JP;
Gaku Ikedo, Chigasaki, JP;
Tetsuo Semba, Zama, JP;
Naoyuki Kagami, Fujisawa, JP;
Akira Tokizono, Fujisawa, JP;
Gaku Ikedo, Chigasaki, JP;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A hard disk device includes a servo control unit that constitutes a servo loop for a head seek for performing read/write of data from/to a recording medium, a correction signal generation unit for generating a correction signal for correcting a control by the servo control unit based on an output of a predetermined sensor, and a correction signal control unit for estimating an effect of supplying the correction signal to the servo loop and for controlling whether or not the correction signal is to be supplied to the servo loop in response to a result of the estimation. Moreover, the gain of the sensor is dynamically controlled in response to the above estimation result.