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. 05, 1996
Filed:
Dec. 13, 1994
Naoki Satoh, Odawara, JP;
Takeshi Maeda, Kokubunji, JP;
Atsushi Saito, Ichikawa, JP;
Hisataka Sugiyama, Kodaira, JP;
Hirofumi Sukeda, Kodaira, JP;
Hiroyuki Tsuchinaga, Kokubunji, JP;
Yasuhide Ouchi, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An optical disk device which uses a light spot for reproducing data, including photodetector, a decoder, and a non-linear equalizer provided between the photodetector and the decoder for correcting non-linear distortions in a reproduced signal from an optical disk. The non-linear equalizer includes a linear equalizer and a decision feedback equalizer provided after the linear equalizer. The non-linear equalizer includes a detector for detecting a signal on the basis of the output of the linear equalizer with the output of the detector being input to the decision feedback equalizer, the output of which is input to the detector along with the output of the linear equalizer in an additive manner.