Signal processing device for optical disks and optical disk...

Details Signal processing device for optical disks and optical disk... Signal processing device for optical disks and optical disk...

2008-11-25

2011-10-11

Pardo, Thuy (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S044270, C369S044290, C369S044350, C369S044360

Reexamination Certificate

active

08036095

ABSTRACT:
A signal processing device for optical disks includes a reflected light process section configured to convert reflected light received by an optical pickup into an electric signal based on a first gain, wherein the optical pickup emits laser light to an optical disk and receives reflected light from the optical disk; a servo signal generation section configured to generate a servo signal by using the electric signal generated by the reflected light process section; a servo signal control section configured to control the servo signal so that a change in the amplitude of the servo signal, in response to an increase or decrease of the amount of the reflected light from the optical disk, is suppressed using an attenuator that attenuates the servo signal generated by the servo signal generation section by a factor of a second gain; and a gain setting section configured to set the first gain to the reflected light process section and the second gain to the servo signal control section substantially simultaneously.

REFERENCES:
patent: 4866688 (1989-09-01), Ohtake et al.
patent: 5757748 (1998-05-01), Kiyoura et al.
patent: 5862111 (1999-01-01), Arai
patent: 6298019 (2001-10-01), Watanabe et al.
patent: RE40946 (2009-10-01), Watanabe et al.
patent: 2002/0105896 (2002-08-01), Kusumoto et al.
patent: 2005/0063286 (2005-03-01), Hsu et al.
patent: 2005/0157626 (2005-07-01), Lin et al.
patent: 2007/0058502 (2007-03-01), Huang et al.
patent: 2001-266371 (2001-09-01), None
patent: 2001-297454 (2001-10-01), None

Affiliated with

Also associated with

Rating

Signal processing device for optical disks and optical disk... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Signal processing device for optical disks and optical disk..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal processing device for optical disks and optical disk... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4268929