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:
Nov. 28, 2006
Filed:
Aug. 25, 2004
Hiroyuki Tsuchinaga, Kodaira, JP;
Hiroyuki Tsuchinaga, Kodaira, JP;
Hitachi Global Storage Technologies Japan, Ltd., Odawara, JP;
Abstract
A magnetic recording system having a magnetic-recording medium with data sectors wherein a preamble pattern of a prescribed cycle is recorded, the preamble pattern having the cycle of a predetermined T, wherein T represents a minimum duration of a data-recorded bits in the data sectors. The system includes a magnetic head to reproduce the preamble pattern and a signal-processing circuit to process data to be recorded in and reproduced from the data sectors. The signal-processing circuit including (i) a sampler for sampling a signal reproduced from the preamble pattern and (ii) a corrector for correcting the amplitude by using maximum and minimum amplitude values in each cycle of the preamble pattern sampled by the sampler.