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. 06, 2010
Filed:
Sep. 13, 2006
Daniel J. Dolan, Jr., Cottage Grove, MN (US);
Hao Fang, Eden Prairie, MN (US);
Jeffrey A. Gleason, Burnsville, MN (US);
Ross S. Wilson, Menlo Park, CA (US);
Daniel J. Dolan, Jr., Cottage Grove, MN (US);
Hao Fang, Eden Prairie, MN (US);
Jeffrey A. Gleason, Burnsville, MN (US);
Ross S. Wilson, Menlo Park, CA (US);
Agere Systems Inc., Allentown, PA (US);
Abstract
An apparatus and method for determining a head parameter value (e.g., head resistance) of a resistive head. A test head current is supplied to the head during a head parameter measurement interval using the same current sources that supply a bias current to the head during an operating (read operation) interval. The determined head parameter value is latched for use in setting the control loop gain for a control loop that controls the current sources during the operating interval.