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:
Dec. 24, 2002
Filed:
Sep. 01, 2000
Martin Aureliano Hassner, Palo Alto, CA (US);
Francesco Rezzi, Santa Clara, CA (US);
Barry Marshall Trager, Yorktown Heights, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A circuit combines a read signal from an MR/GMR read head with a signal generated by a matched filter, the parameters of which depend on the geometry of the head and the output of which, generated every N clock period, includes a real part and an imaginary part that models an expected head response. The combined signal is phase equalized and sent to a complex correlator, which integrates the signal over N clock periods to output a correlated signal having real and imaginary portions of the N root of unity which correspond to bits in an N-clock data unit. The real and imaginary portions can subsequently be digitized and analyzed for errors.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile