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:
Nov. 14, 2006
Filed:
Feb. 02, 2005
Noboru Yoshida, Kanagawa, JP;
Masato Taniguchi, Kanagawa, JP;
Noboru Yoshida, Kanagawa, JP;
Masato Taniguchi, Kanagawa, JP;
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Abstract
Embodiments of the invention are directed to setting optimum FIR filter coefficients. In one embodiment, a POR (Power On Reset) control block acquires temperature data from a thermistor. If the temperature is the first to have been detected as falling within a low temperature range, a filter coefficient determining block in a read/write channel determines filter coefficients of a FIR filter by using the signal acquired from the magnetic disk. The determined filter coefficients are set to the FIR filter. If the temperature data does not satisfy the above-mentioned condition, filter coefficients registered in a filter coefficient table are set to the FIR filter.