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:
Sep. 28, 2004
Filed:
Jan. 04, 2002
Defined signal injection to calibrate servo index positions employing an independent position sensor
Alex Chliwnyj, Tucson, AZ (US);
Edward George Butt, Tucson, AZ (US);
David Lee Swanson, Tucson, AZ (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Calibration of magnetic tape servo index positions, which are laterally offset from edges and measured by ratios of dissimilar servo signals. A defined signal is injected into the track following servo to modulate the lateral position of the servo sensor, which is detected by an independent position sensor. Logic converts the detected lateral positions and servo signals to frequency components; selects injected signal frequency components; converts the selected frequency components to lateral positions and servo signals, and fits a curve to the converted lateral positions with respect to the converted servo signals to calibrate the index positions.