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, 2012
Filed:
Aug. 18, 2009
Hisakatsu Yamaguchi, Kawasaki, JP;
Shunichiro Masaki, Kawasaki, JP;
Hideki Ishida, Kawasaki, JP;
Kohtaroh Gotoh, Kawasaki, JP;
Hisakatsu Yamaguchi, Kawasaki, JP;
Shunichiro Masaki, Kawasaki, JP;
Hideki Ishida, Kawasaki, JP;
Kohtaroh Gotoh, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An adaptive equalizer circuit includes an equalizer circuit configured to produce an output data signal in response to an equalizing factor, a data detecting circuit configured to detect a signal level of the output data signal in a given unit time at predetermined timing, a boundary detecting circuit configured to detect a signal level of the output data signal at a timing that is ½ unit time away from the predetermined timing, and a control unit configured to detect, multiple times, a pattern having consecutive data items of a first value followed by a data item of a second value, and to adjust the equalizing factor such that a data detection value and a boundary detection value obtained for the data item of the second value are equal to each other a certain percentage of times, and are different from each other substantially the same percentage of times.