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. 07, 2003
Filed:
Dec. 28, 2000
Charles H. Sobey, Plano, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A method and apparatus for characterizing a magnetic disk ( ) of the type that contains data to be read by a magneto-resistive type head ( ) in proximity thereto is disclosed. The method includes writing a continuous signal onto the disk, and reading back the signal written onto the disk ( ) using the magneto-resistive type head ( ). The read back signal is compared to a threshold value ( ), and areas of said disk at which energy contained in said read back signal occurs above said threshold value ( ) are mapped. The energy content is measured by accumulating oversampled signal values from the read back signal during a time at which said read back signal exceeds the threshold value ( ).