Laser control circuit in recordable optical disk drive

Details Laser control circuit in recordable optical disk drive Laser control circuit in recordable optical disk drive

1997-08-13

1998-11-03

Swann, Tod R.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369121, 372 25, G11B 700

Patent

active

058319590

ABSTRACT:
An improved laser control circuit in a recordable optical disk drive is disclosed. The laser control circuit includes a feeding circuit which supplies an auxiliary current into a bypass capacitor provided on a control line of a drive current switching circuit for a laser diode, so that the charge current for the bypass capacitor is increased. Therefore, the required time to start the emission of the laser beam for recording is reduced. The laser control circuit also includes a control circuit which controls the on/off state of the feeding circuit. The control circuit turns off upon detecting to the transition of the state of the drive current switching circuit to the on state, accordingly it ensure the normal operation of the laser control circuit.

REFERENCES:
patent: 5444728 (1995-08-01), Thompson
patent: 5495464 (1996-02-01), Fujikawa et al.
patent: 5519431 (1996-05-01), Kusano et al.

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