Reading circuit for an optical information storing apparatus

Details Reading circuit for an optical information storing apparatus Reading circuit for an optical information storing apparatus

1988-10-19

1990-12-04

Canney, Vincent P.

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

360 46, G11B 760, G11B 509

Patent

active

049758977

ABSTRACT:
A circuit applicable to an optical disk apparatus or similar optical information storing apparatus for reading out information being stored. A differentiated signal produced by differentiating an analog signal read out is compared with a predetermined threshold value to produce a leading edge level signal and a trailing edge level signal which are respectively the results of comparison performed in a polarity immediately before a peak of the analog signal and a polarity immediately after the peak. The leading edge level signal is delayed by a predetermined period of time and then compared with a peak signal for coincidence. The result of this comparison is further delayed by a predetermined period of time and then compared with the trailing edge level signal for comparison to deliver the result as read out data. 1

REFERENCES:
patent: 4688204 (1987-08-01), Noyes, Jr. et al.

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