Signal producing apparatus for optical recording/reproducing app

Details Signal producing apparatus for optical recording/reproducing app Signal producing apparatus for optical recording/reproducing app

1991-11-26

1993-07-20

Sniezek, Andrew L.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4432, 2502015, G11B 700, G01J 120

Patent

active

052299848

ABSTRACT:
A photodetector to be used to produce a track error signal or the like by receiving the reflected light of light beams radiated to an optical recording medium is formed of a plurality of photodetecting devices provided as divided on a common chip and is provided with either a; leaking current absorbing member for suppressing a leaking current form overflowing through the chip from the photodetecting device receiving a light beam of a large light amount into the other photodetecting devices causing noises; or with a circuit for preventing the generation of a leaking current.

REFERENCES:
patent: 3876842 (1975-04-01), Bouwhuls
patent: 4309604 (1982-01-01), Yoshikawa et al.
patent: 4496834 (1985-01-01), Nanba et al.
patent: 4742219 (1988-05-01), Ando
patent: 4807209 (1989-02-01), Kramer et al.
patent: 4810871 (1989-03-01), Opheij

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