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. 02, 2003
Filed:
Mar. 04, 1999
Hiroki Kuribayashi, Tsurugashima, JP;
Shogo Miyanabe, Tsurugashima, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Abstract
A waveform equalizer which can improve a quality of a read signal by certainly correcting asymmetry in the read signal and a data reproducing apparatus using the waveform equalizer. The waveform equalizer performs a waveform equalization to the read signal and is constructed by: inclination discriminating means for detecting an ascending slope portion and a descending slope portion of the read signal; a filter for performing a filtering process to the read signal; and characteristics switching means for switching frequency characteristics of the filter in accordance with a discrimination output of the inclination discriminating means.