Power control circuit for optical information recording device
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United States of America Patent
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Oct 9, 2012
Grant Date -
N/A
app pub date -
Sep 6, 2007
filing date -
Mar 30, 2001
priority date (Note) -
In Force
status (Latency Note)
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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.
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