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:
May. 28, 2013
Filed:
Jun. 01, 2010
Nobuyuki Asai, Kanagawa, JP;
Nobuyoshi Kobayashi, Kanagawa, JP;
Yuji Gendai, Kanagawa, JP;
Kazumasa Nishimoto, Tokyo, JP;
Masaaki Ishihara, Kanagawa, JP;
Satoshi Kato, Kanagawa, JP;
Nobuyuki Asai, Kanagawa, JP;
Nobuyoshi Kobayashi, Kanagawa, JP;
Yuji Gendai, Kanagawa, JP;
Kazumasa Nishimoto, Tokyo, JP;
Masaaki Ishihara, Kanagawa, JP;
Satoshi Kato, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
An optical disk reproducing device includes: a signal reproducing section configured to read and decode information recorded on an optical disk by an optical pickup unit, and reproduce the information, wherein the signal reproducing section includes a gain controlled amplifier circuit configured to amplify an radio frequency signal generated from a light receiving element, an automatic gain control circuit configured to control a gain of the gain controlled amplifier circuit, and a signal processing section configured to derive a part of an automatic gain control value generated in the automatic gain control circuit, and generate a control signal for adjusting one of an optical system path and a detection system path for controlling the optical pickup unit.