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. 18, 2001
Filed:
Jan. 06, 1999
Yung-soo Kim, Sungnam, KR;
Abstract
A nonlinear equalizing apparatus used for a digital magnetic recording medium is provided. The nonlinear equalizing apparatus according to the present invention includes a linear filter for linear filtering the input value r,, a pattern dependent filter including 2,tap values selected by the respective patterns (b,,b,) of future v and past &tgr; bit data transition absolute values and N taps p,(b,,b,) for outputting the value obtained by multiplying the selected tap value with the current transition (x,), and (wherein, x,=(a,−a,)/2∈{−1, 0, }, b,=|x,|∈{0, 1}, b,=(b,b,. . . b,), b,=(b,b,. . . b,), n=0, 1, 2, . . . , N, and N is a predetermined integer not less than 1+v) a detector for obtaining an error value e,by a subsequent equation, with respect to all combinations of current and future data sequences