Power control circuit for optical information recording device

Details Power control circuit for optical information recording device Power control circuit for optical information recording device

2005-09-06

2005-09-06

Hindi, Nabil (Department: 2655)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S053260, C369S116000

Reexamination Certificate

active

06940804

ABSTRACT:
A power control circuit for an optical information recording device is disclosed. A power sampling signal from a photodiode is transmitted to a peal envelope acquiring circuit and a bottom envelope acquiring circuit and then sampled and held, which is fed-back to a laser diode driving circuit. The laser diode driving circuit alters a driving signal emitted to the laser diode according to the fed-back signal to adjust the power of the optical signal emitted from the laser diode. Therefore, cost is reduced and the power control circuit is particularly suitable for high-speed recordable optical disk drive.

REFERENCES:
patent: 5412632 (1995-05-01), Mita et al.
patent: 6249490 (2001-06-01), Miyaoka
patent: 6320832 (2001-11-01), Nakao et al.
patent: 6646968 (2003-11-01), Miyaoka

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