Optical disc reproducing apparatus

Details Optical disc reproducing apparatus Optical disc reproducing apparatus

G - Physics

11

B

352/32.2

G11B 7/00 (2006.01) G11B 7/085 (2006.01) G11B 7/09 (2006.01)

Patent

CA 2029719

A detected signal of an optical pickup is applied to an automatic gain control circuit (AGC circuit) for equalizing the level of the detected signal, the output of the AGC circuit is detected by an envelope detector and is compared with a reference level by a comparator, and the output of the comparator is applied to the AGC circuit as a gate signal for holding the gain of the AGC circuit to a predetermined value during tracing of a nonrecorded part of a track, and additionally, a jump signal which is output in track jump operation of the optical pickup is applied to the AGC circuit to hold the gain to the predetermined value during the track jump operation.

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