Common mode rejection control in an optical disk drive

Details Common mode rejection control in an optical disk drive Common mode rejection control in an optical disk drive

1993-11-12

1995-08-15

Popek, Joseph A.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4432, 369 54, 369100, 369110, G11B 700

Patent

active

054426189

ABSTRACT:
An optical drive provides an internal routine for automatically optimizing the common mode rejection ratio of the magneto-optic data output signal. A microprocessor provides control to a controller module which in turn supplies a plurality of calibration signals to a data detecting portion. The calibration signals modify predetermined parameters of the data detecting portion based upon measuring a predetermined parameter indicative of the common mode rejection ratio. The common mode rejection ratio optimization corrects for mismatches in both the optical elements and in the electronic data circuits.

REFERENCES:
patent: 4847824 (1989-07-01), Davie
patent: 4964110 (1990-10-01), Horimai et al.
patent: 5105415 (1992-04-01), Tayefeh
patent: 5132954 (1992-07-01), Kulakowski et al.
patent: 5265085 (1993-11-01), Jaquette et al.

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