Apparatus for controlling monitor photo diode in optical...

Details Apparatus for controlling monitor photo diode in optical... Apparatus for controlling monitor photo diode in optical...

2008-05-13

2008-05-13

Korzuch, William (Department: 2627)

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

C369S059110, C369S059130

Reexamination Certificate

active

10687994

ABSTRACT:
An apparatus for controlling a monitor photo diode (PD) of an optical pickup system monitors an optical power signal output for writing data on or reading data from a disk. The apparatus includes a comparator which compares a voltage signal corresponding to the optical power signal output from the LD with a predetermined reference voltage signal, and a gain selector which selectively issues a gain output from the comparator depending on the type of the optical power signal output from the LD.

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patent: 8249701 (1996-09-01), None
patent: 1020010077597 (2002-08-01), None
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