Write signal control circuit in an optical disk drive

Details Write signal control circuit in an optical disk drive Write signal control circuit in an optical disk drive

2004-07-01

2008-12-30

Dinh, Tan X (Department: 2627)

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Control of information signal processing channel

C369S053340, C369S059200, C369S059110, C369S059120

Reexamination Certificate

active

07471599

ABSTRACT:
A write signal control circuit in an optical disk drive for adjusting the duty cycle of the write signals by a duty cycle adjusting unit. The write signal control circuit includes a write signal generator for converting an EFM signal into the write signals according to the write strategy waveform generating rules, a duty cycle adjusting unit for adjusting the duty cycle of each write signal according to adjusting parameters and for outputting adjusted write signals, and a duty cycle detector for detecting the duty cycle of each adjusted write signal and outputting a respective duty cycle control signal. The duty cycle adjusting unit further receives the duty cycle control signal to adapt the adjusting parameters.

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