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:
Jan. 28, 2003
Filed:
Feb. 02, 2001
Hua Liu, Eden Prairie, MN (US);
Timothy A. Madsen, Bloomington, MN (US);
Alex C. Toy, North St. Paul, MN (US);
Lezlie A. Hughes, Randolph, MN (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
This invention presents a method and system for testing a disc drive head usable with a disc drive head testing device. The steps for this include determining an unknown electrical property of the head testing device. This is done by generating output signals at the output stage. The testing device property is then computed by solving for the unknown electrical property based on the output signals generated for each of the known test devices. For each disc drive head under test, the head is coupled to the input lead and exposed to a stored magnetic data pattern to generate a read signal at the input lead. The measured difference affects the generated read output signal. The read output signal is adjusted based on the testing device property and the measured property to compensate for differences in the measured property.