Tracking error signal correcting system which adjusts gain such

Details Tracking error signal correcting system which adjusts gain such Tracking error signal correcting system which adjusts gain such

1993-06-22

1995-08-15

Young, W. R.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4429, 369 4431, 369 4434, 369 4435, G11B 7095

Patent

active

054426090

ABSTRACT:
A tracking error generating system is provided for generating a tracking error signal based on a laser beam irradiated on a writable optical disc by a pickup. Test data are recorded on a power calibration area (PCA) of the disc. A recording tracking error signal is obtained by jumping the pickup in the PCA, and the recording tracking error signal is stored in a first memory. A reading tracking error signal obtained through the tracking error generating system at reproduction of the optical disc is stored in a second memory. An adjusting circuit is provided for adjusting gain of the tracking error generating system so that the level of the reading tracking error signal becomes equal to the level of the recording tracking error signal.

REFERENCES:
patent: 4286318 (1981-08-01), Immink et al.
patent: 5138594 (1992-08-01), Fennema et al.
patent: 5197058 (1993-03-01), Bell, Jr. et al.
patent: 5220549 (1993-06-01), Yanagidate
patent: 5251194 (1993-10-01), Yoshimoto et al.

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