Apparatus for reproducing information by delaying and attenuatin

Details Apparatus for reproducing information by delaying and attenuatin Apparatus for reproducing information by delaying and attenuatin

1993-04-20

1993-12-07

Psitos, Aristotelis

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 54, G11B 700

Patent

active

052688941

ABSTRACT:
An apparatus for reproducing information is adapted to irradiate a laser beam onto a recording surface of an information recording optical disk on which record information are written to transform a reflected laser beam from the recording surface to an electric signal by using a photoelectric transducer, thus to reproduce record information on the basis of this electric signal. The apparatus has a signal delayer for delaying an electric signal by a predetermined time, a signal attenuator for attenuating the delayed signal, and a signal subtracter for subtracting the delayed signal from the electric signal to output a subtraction signal.

REFERENCES:
patent: 4849953 (1989-07-01), Nomura et al.
patent: 4866688 (1989-09-01), Ohtaka et al.
patent: 4924447 (1990-05-01), Fuji et al.
patent: 4961182 (1990-10-01), Saito et al.
patent: 5020046 (1991-05-01), Ueda

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