Automatic control system for a tracking servo unbalance of optic

Details Automatic control system for a tracking servo unbalance of optic Automatic control system for a tracking servo unbalance of optic

1992-09-16

1994-03-01

Chin, Tommy P.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 32, 369 4436, G11B 709

Patent

active

052914666

ABSTRACT:
An automatic control system for tracking servo unbalance of optical disc player, which comprises first and second variable gain amplifiers, first and second photodetectors, a differential amplifier having resistors and capacitor, a direct current detector, a digital storing unit having an A/D/ converter, a ROM, a D/A converter, and an analog switch whereby the tracking servo unbalance is automatically eliminated upon manufacturing a CD player as well as the direct current detector and digital storing unit can be integrated so that cost is down and improvement of reliability is obtained.

REFERENCES:
patent: 4539665 (1985-09-01), Iso et al.
patent: 4614863 (1986-09-01), Sato

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