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:
Nov. 27, 2002
Zhang Tao, Shakopee, MN (US);
John Christopher Morris, Minneapolis, MN (US);
Priyadarshee Deeptarag Mathur, Bloomington, MN (US);
Zhang Tao, Shakopee, MN (US);
John Christopher Morris, Minneapolis, MN (US);
Priyadarshee Deeptarag Mathur, Bloomington, MN (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
An NRRO compensation circuit controls a head position in a disc drive. The circuit has a first frequency circuit providing a first output corresponding to NRRO and a first characteristic sensing circuit that senses the first output and that generates a first control output that adjusts a first NRRO compensation gain. A first control circuit included in the NRRO compensation circuit receives the first control output and the first NRRO compensation gain and provides a first NRRO compensator output.